TPS7A20_V05 [TI]

TPS7A20 300-mA, Ultra-Low-Noise, Low-IQ, High PSRR LDO;
TPS7A20_V05
型号: TPS7A20_V05
厂家: TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
描述:

TPS7A20 300-mA, Ultra-Low-Noise, Low-IQ, High PSRR LDO

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TPS7A20  
SBVS338A MARCH 2020REVISED MARCH 2020  
TPS7A20 300-mA, Ultra-Low-Noise, Low-IQ, High PSRR LDO  
1 Features  
3 Description  
The TPS7A20 is an ultra-small, low-dropout (LDO)  
1
Low output voltage noise: 6 µVRMS  
No noise-bypass capacitor required  
linear regulator that can source 300 mA of output  
current. The TPS7A20 is designed to provide low  
noise, high PSRR, and excellent load line transient  
performance that can meet the requirements of RF  
and other sensitive analog circuits. Using innovative  
design techniques, the TPS7A20 offers an ultra-low  
noise performance without the addition of a noise  
bypass capacitor. The TPS7A20 also provides the  
advantage of low quiescent current, which can be  
ideal for any battery-powered applications. The  
High PSRR: 85 dB at 1 kHz  
Very low IQ: 6.5 µA  
Input voltage range: 1.6 V to 6.0 V  
Output voltage range: 0.8 V to 5.5 V  
Output voltage tolerance: ±1.5% (max)  
Very low dropout:  
140 mV (max) at 300 mA (VOUT = 3.3 V)  
TPS7A20 can be used for  
a wide variety of  
Low inrush current  
applications by supporting an input voltage range  
from 1.6 V to 6.0 V and a wide output range of 0.8 V  
to 5.5 V. The device uses a precision reference circuit  
to provide a maximum accuracy of 1.5% over load,  
line, and temperature variations  
Smart enable pulldown  
Stable with 1-µF minimum ceramic output  
capacitors  
Packages:  
The TPS7A20 features an internal soft-start to lower  
the inrush current, thus minimizing the input voltage  
drop during start up. The device is stable with small  
ceramic capacitors, allowing for a small overall  
solution size.  
1-mm × 1-mm X2SON  
0.603-mm × 0.603-mm DSBGA (preview)  
2.90-mm × 1.60-mm SOT23-5 (preview)  
2 Applications  
The TPS7A20 has a smart enable input circuit with  
an internally controlled pulldown resistor that keeps  
the LDO disabled even when the EN pin is left  
floating and helps eliminate the external components  
used to pulldown the EN pin.  
Smartphones and tablets  
IP network cameras  
Portable medical equipment  
Smart meters and field transmitters  
Motor drives  
Device Information(1)  
PART  
NUMBER  
PACKAGE  
BODY SIZE (NOM)  
Wearables  
X2SON (4)  
1.00 mm × 1.00 mm  
0.603 mm × 0.603 mm  
2.90 mm × 1.60 mm  
Simplified Schematic  
TPS7A20  
DSBGA (4)(2)  
SOT-23 (5)(2)  
VOUT  
VIN  
OUTPUT  
INPUT  
1 µF  
(1) For all available packages, see the orderable addendum at  
the end of the data sheet.  
1 µF  
(2) Preview package.  
TPS7A20  
VEN  
ENABLE  
GND  
GND  
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. ADVANCE INFORMATION for pre-production products; subject to  
change without notice.  
 
 
 
 
 
TPS7A20  
SBVS338A MARCH 2020REVISED MARCH 2020  
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Table of Contents  
7.4 Device Functional Modes........................................ 12  
Application and Implementation ........................ 13  
8.1 Application Information............................................ 13  
8.2 Typical Application .................................................. 17  
Power Supply Recommendations...................... 17  
1
2
3
4
5
6
Features.................................................................. 1  
Applications ........................................................... 1  
Description ............................................................. 1  
Revision History..................................................... 2  
Pin Configuration and Functions......................... 3  
Specifications......................................................... 5  
6.1 Absolute Maximum Ratings ...................................... 5  
6.2 ESD Ratings.............................................................. 5  
6.3 Recommended Operating Conditions....................... 5  
6.4 Thermal Information.................................................. 6  
6.5 Electrical Characteristics........................................... 6  
6.6 Switching Characteristics.......................................... 7  
6.7 Typical Characteristics.............................................. 8  
Detailed Description .............................................. 9  
7.1 Overview ................................................................... 9  
7.2 Functional Block Diagram ......................................... 9  
7.3 Feature Description................................................. 10  
8
9
10 Layout................................................................... 18  
10.1 Layout Guidelines ................................................. 18  
10.2 Layout Examples................................................... 18  
11 Device and Documentation Support ................. 20  
11.1 Device Support...................................................... 20  
11.2 Receiving Notification of Documentation Updates 20  
11.3 Community Resources.......................................... 20  
11.4 Trademarks........................................................... 20  
11.5 Electrostatic Discharge Caution............................ 20  
11.6 Glossary................................................................ 20  
7
12 Mechanical, Packaging, and Orderable  
Information ........................................................... 20  
4 Revision History  
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.  
Changes from Original (March 2020) to Revision A  
Page  
Changed low output voltage noise from 7 µVRMS to 6 µVRMS in Features section ................................................................. 1  
Changed YEN package designator to YWD throughout document ...................................................................................... 3  
Changed DQN pin out drawing from Bottom View to Top View ............................................................................................ 4  
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5 Pin Configuration and Functions  
YWD Package (Preview)  
4-Pin DSBGA  
YWD Package (Preview)  
4-Pin DSBGA  
Top View  
Bottom View  
1
2
1
2
A
IN  
OUT  
B
EN  
GND  
B
EN  
GND  
A
IN  
OUT  
Not to scale  
Not to scale  
Pin Functions: DSBGA  
PIN  
I/O  
DESCRIPTION  
NO.  
NAME  
Input voltage supply. For best transient response and to minimize input impedance, use the  
recommended value or larger capacitor from IN to ground as listed in the Recommended  
Operating Conditions table. Place the input capacitor as close to the IN and GND pins of the  
device as possible.  
A1  
A2  
IN  
I
Regulated output voltage. A minimum 1-µF low equivalent series resistance (ESR) capacitor  
is required from OUT to ground for stability. For best transient response, use the nominal  
recommended value or larger capacitor from OUT to ground. Follow the recommended  
capacitor value as listed in the Recommended Operating Conditions table. Place the output  
capacitor as close to the OUT and GND pins of the device as possible. An internal 150-Ω  
(typical) pulldown resistor prevents a charge from remaining on VOUT when the regulator is  
in shutdown mode (VEN< VIL).  
OUT  
O
Enable input. A low voltage (< VIL) on this pin turns the regulator off and discharges the  
output pin to GND. A high voltage (> VIH) on this pin enables the regulator output. This pin  
has an internal 500-kΩ pulldown resistor to hold the regulator off by default.  
B1  
B2  
EN  
I
GND  
Common ground.  
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DQN Package  
4-Pin X2SON  
Top View  
DBV Package (Preview)  
5-Pin SOT-23  
Top View  
OUT  
1
4
IN  
IN  
GND  
EN  
1
2
3
5
OUT  
5
Thermal Pad  
4
N/C  
GND  
2
3
EN  
Not to scale  
Not to scale  
Pin Functions: X2SON, SOT-23  
PIN  
I/O  
DESCRIPTION  
NAME  
X2SON  
SOT-23  
Input voltage supply. For best transient response and to minimize input  
impedance, use the recommended value or larger capacitor from IN to ground as  
listed in the Recommended Operating Conditions table. Place the input capacitor  
as close to the IN and GND pins of the device as possible.  
IN  
4
1
3
1
I
O
I
Regulated output voltage. A minimum 1-µF low ESR capacitor is required from  
OUT to ground for stability. For best transient response, use the nominal  
recommended value or larger capacitor from OUT to ground. Follow the  
recommended capacitor value as listed in the Recommended Operating  
Conditions table. Place the output capacitor as close to the OUT and GND pins of  
the device as possible. An internal 150-Ω (typical) pulldown resistor prevents a  
OUT  
EN  
5
3
charge from remaining on VOUT when the regulator is in shutdown mode (VEN  
VIL).  
<
Enable input. A low voltage (< VIL) on this pin turns the regulator off and  
discharges the output pin to GND. A high voltage (> VIH) on this pin enables the  
regulator output. This pin has an internal 500-kΩ pulldown resistor to hold the  
regulator off by default.  
GND  
N/C  
2
2
4
Common ground.  
No internal electrical connection.  
Thermal pad for the X2SON package. Connect this pad to GND or leave floating.  
Do not connect to any potential other than GND. Connect the thermal pad to a  
large-area ground plane for best thermal performance.  
Thermal Pad  
5
4
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6 Specifications  
6.1 Absolute Maximum Ratings  
over operating free-air temperature range (unless otherwise noted)(1)  
MIN  
MAX  
UNIT  
VIN  
–0.3  
6.5  
VIN + 0.3 or  
6.0V(2)  
Voltage  
Current  
VOUT  
–0.3  
V
VEN  
–0.3  
Internally limited  
-40  
6.5  
Maximum output current  
Operating junction temperature, TJ  
Storage temperature, Tstg  
A
125  
150  
°C  
°C  
Temperatu  
re  
–65  
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Theseare stress ratings  
only, and functional operation of the device at these or any other conditionsbeyond those indicated underRecommended Operating  
Conditionsis not implied. Exposure to absolute-maximum-rated conditions forextended periods may affect device reliability.  
(2) Maximum is VIN + 0.3 V, or 6.0 V, whichever is smaller  
6.2 ESD Ratings  
VALUE  
±2000  
±750  
UNIT  
Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1)  
Charged-device model (CDM), per JEDEC specification JESD22-C101(2)  
V(ESD)  
Electrostatic discharge  
V
(1) JEDEC document JEP155 states that 500-V HBM allows safemanufacturing with a standard ESD control process.  
(2) JEDEC document JEP157 states that 250-V CDM allows safemanufacturing with a standard ESD control process.  
6.3 Recommended Operating Conditions  
over operating free-air temperature range (unless otherwise noted)  
MIN  
1.6  
0
NOM  
MAX  
6.0  
UNIT  
V
VIN  
Input supply voltage  
Enable input voltage  
Output voltage  
VEN  
VOUT  
IOUT  
CIN  
6.0  
V
0.8  
0
5.5  
V
Output current  
300  
mA  
µF  
µF  
m  
°C  
Input capacitor  
1
(2)  
COUT  
ESR  
TJ  
Output capacitor(1)  
1
200  
80  
Output Capacitor  
Operating junction temperature  
–40  
125  
(1) Effective output capacitance of 0.5 µF minimum is required for stability  
(2) 200 µF is the maximum derated capacitance that can be used for stability  
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6.4 Thermal Information  
TPS7A20  
(2)  
YWD(2)  
(DSBGA)  
DBV  
DQN  
(X2SON)  
THERMAL METRIC(1)  
UNIT  
(SOT-23)  
5 PINS  
TBD  
4 PINS  
179.1  
137.6  
116.3  
6.1  
4 PINS  
TBD  
TBD  
TBD  
TBD  
TBD  
TBD  
RθJA  
Junction-to-ambient thermal resistance  
°C/W  
°C/W  
°C/W  
°C/W  
°C/W  
°C/W  
RθJC(top)  
RθJB  
Junction-to-case (top) thermal resistance  
Junction-to-board thermal resistance  
TBD  
TBD  
ψJT  
Junction-to-top characterization parameter  
Junction-to-board characterization parameter  
Junction-to-case (bottom) thermal resistance  
TBD  
ψJB  
TBD  
116.3  
112.3  
RθJC(bot)  
TBD  
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application  
report.  
(2) Preview Package  
6.5 Electrical Characteristics  
at operating temperature range (TJ = –40to +125), VIN = VOUT(NOM) + 0.3 V or 1.6V, whichever is greater, VEN = 1.0 V,  
IOUT = 1 mA, CIN = 1 µF, COUT = 1 µF (unless otherwise noted); all typical values are at TJ = 25℃  
PARAMETER  
TEST CONDITIONS  
VIN = (VOUT(NOM) + 0.3 V) to 6.0 V,  
IOUT = 1 mA to 300 mA,  
OUT 1.5 V  
MIN  
TYP  
MAX  
UNIT  
–1.5  
1.5  
%
V
ΔVOUT  
Output voltage tolerance  
VIN = (VOUT(NOM) + 0.5 V) to 6.0 V,  
IOUT = 1 mA to 300 mA  
VOUT < 1.5 V  
–30  
30  
mV  
VIN = (VOUT(NOM) + 0.3 V) to 6.0 V,  
IOUT = 1 mA  
ΔVOUT  
(ΔVIN  
Line regulation  
Load regulation  
0.03  
%/V  
)
ΔVOUT(ΔIO  
IOUT = 1 mA to 300 mA  
0.003  
6.5  
%/mA  
)
UT  
TJ = 25°C  
8
10  
20  
VEN = VIN, VIN = 6.0  
V, IOUT = 0 mA  
TJ = –40°C to 85°C  
TJ = –40°C to 125°C  
IGND  
Ground current  
µA  
VEN = VIN, VIN = 6.0 V, IOUT = 300 mA  
2000  
0.15  
6.5  
ISHTDWN  
IGND(DO)  
Shutdown current  
VEN = 0 V (disabled), VIN = 6.0 V, TJ = 25°C  
0.5  
20  
µA  
µA  
Ground current in dropout  
VIN VOUT(NOM) , IOUT = 0 mA  
0.8 V VOUT < 1.0 V  
690  
490  
355  
240  
140  
140  
730  
1.0 V VOUT < 1.2 V  
1.2 V VOUT < 1.5 V  
1.5 V VOUT < 2.5 V  
2.5 V VOUT < 3.3 V  
3.3 V VOUT 5.5 V  
IOUT = 300 mA,  
VOUT = 95% x  
VOUT(NOM)  
VDO  
Dropout voltage  
mV  
ICL  
ISC  
Output current limit  
VOUT = 0.9 x VOUT(NOM), VIN = VOUT(NOM) + VDO  
360  
520  
160  
85  
73  
70  
49  
85  
73  
56  
48  
6
mA  
mA  
dB  
dB  
dB  
dB  
dB  
dB  
dB  
dB  
Short-circuit current limit  
VOUT = 0 V  
f = 1 kHz  
f = 10 kHz  
f = 100 kHz  
f = 1 MHz  
IOUT = 20 mA,  
VIN = VOUT + 1.0 V  
PSRR  
PSRR  
Power-supply rejection ratio  
f = 1 kHz  
f = 10 kHz  
f = 100 kHz  
f = 1 MHz  
IOUT = 300 mA,  
VIN = VOUT + 1.0 V  
Power-supply rejection ratio  
Output noise voltage  
BW = 10 Hz to 100  
kHz  
VOUT = 2.8V  
IOUT = 300 mA  
VN  
µVRMS  
IOUT = 1 mA  
10  
Output automatic discharge  
pulldown resistance  
RPULLDOWN  
VEN < VEN(LOW) (output disabled)  
150  
Ω
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Electrical Characteristics (continued)  
at operating temperature range (TJ = –40to +125), VIN = VOUT(NOM) + 0.3 V or 1.6V, whichever is greater, VEN = 1.0 V,  
IOUT = 1 mA, CIN = 1 µF, COUT = 1 µF (unless otherwise noted); all typical values are at TJ = 25℃  
PARAMETER  
TEST CONDITIONS  
MIN  
TYP  
165  
140  
MAX  
UNIT  
Thermal shutdown rising  
Thermal shutdown falling  
TJ rising  
TSD  
°C  
TJ falling  
VIN = 1.6 V to 6.0 V,  
VEN falling until the output is disabled  
VEN(LOW)  
VEN(HI)  
EN pin logic low threshold  
EN pin logic high threshold  
0.25  
V
V
VIN = 1.6 V to 6.0 V  
VEN rising until the output is enabled  
0.92  
VIN rising  
VIN falling  
1.21  
1.17  
1.35  
1.3  
1.55  
1.5  
V
V
VUVLO  
UVLO threshold  
VUVLO(HYST  
UVLO hysteresis  
50  
120  
500  
mV  
nA  
)
IEN  
EN Pin leakage current  
Smart enable pulldown resistor  
VEN = 6.0 V and VIN = 6.0 V  
VEN = 0.25 V  
250  
REN(PULL-  
KΩ  
DOWN)  
6.6 Switching Characteristics  
at operating temperature range (TJ = –40to +125), VIN = VOUT(NOM) + 0.3 V or 1.6V, whichever is greater, VEN = 1.0 V,  
IOUT = 1 mA, CIN= 1 µF, COUT = 1 µF (unless otherwise noted); all typical values are at TJ = 25℃  
PARAMETER  
TEST CONDITIONS  
MIN  
TYP  
MAX  
UNIT  
From VEN > VIH to VOUT = 95% of VOUT(NOM)  
,
tON  
Turnon time  
750  
1500  
µs  
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6.7 Typical Characteristics  
VIN = VOUT(NOM) + 0.3 V or 1.6 V (whichever is greater), VOUT = 2.8 V, IOUT = 1 mA, CIN = 1 µF, COUT = 1 µF, and TA = 25°C  
(unless otherwise noted)  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
120  
110  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
VIN  
3.3 V  
VIN  
3.3 V  
3.1 V  
3.8 V  
3.1 V  
3.8 V  
1k  
10k  
100k  
Frequency (Hz)  
1M  
10M  
1k  
10k  
100k  
Frequency (Hz)  
1M  
10M  
D001  
D001  
VOUT = 2.8 V, IOUT = 20 mA, COUT = 1 µF  
VOUT = 2.8 V, IOUT = 300 mA, COUT = 1 µF  
Figure 1. PSRR at 20-mA Loads  
Figure 2. PSRR at 300-mA Loads  
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7 Detailed Description  
7.1 Overview  
Designed to meet the needs of sensitive RF and analog circuits, the TPS7A20 provides low noise, high PSRR,  
low quiescent current, as well as low line and load transient response figures. Using innovative design  
techniques, the TPS7A20 offers class-leading noise performance without the need for a separate noise filter  
capacitor.  
The TPS7A20 is designed to perform with a single 1-µF input capacitor and a single 1-µF ceramic output  
capacitor.  
7.2 Functional Block Diagram  
Current  
Limit  
IN  
OUT  
Bandgap  
+
Active Discharge  
P-Version Only  
œ
œ
+
Error  
Amp  
+
UVLO  
Internal  
Controller  
Thermal  
Shutdown  
EN  
GND  
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7.3 Feature Description  
7.3.1 Low Output Noise  
Any internal noise at the TPS7A20 reference voltage is reduced by a first-order, low-pass RC filter before being  
passed to the output buffer stage. The low-pass RC filter has a –3-dB cut-off frequency of approximately 0.1 Hz.  
7.3.2 Smart Enable  
The enable pin for the device is an active-high pin. The output voltage is enabled when the voltage of the enable  
pin is greater than the high-level input voltage of the EN pin and disabled with the enable pin voltage is less than  
the low-level input voltage of the EN pin. If independent control of the output voltage is not needed, connect the  
enable pin to the input of the device.  
This device has a smart enable circuit to reduce quiescent current. When the voltage on the enable pin is driven  
above VEN(HI), as listed in the Electrical Characteristics table, the device is enabled and the smart enable internal  
pulldown resistor (REN(PULLDOWN)) is disconnected. When the enable pin is floating, the REN(PULLDOWN) is  
connected and pulls the enable pin low to disable the device. The REN(PULLDOWN) value is listed in the Electrical  
Characteristics table.  
This device has an internal pulldown circuit that activates when the device is disabled to actively discharge the  
output voltage.  
7.3.3 Dropout Voltage  
Dropout voltage (VDO) is defined as the input voltage minus the output voltage (VIN – VOUT) at the rated output  
current (IRATED), where the pass transistor is fully on. IRATED is the maximum IOUT listed in the Recommended  
Operating Conditions table. The pass transistor is in the ohmic or triode region of operation, and acts as a switch.  
The dropout voltage indirectly specifies a minimum input voltage greater than the nominal programmed output  
voltage at which the output voltage is expected to stay in regulation. If the input voltage falls to less than the  
nominal output regulation, then the output voltage falls as well.  
For a CMOS regulator, the dropout voltage is determined by the drain-source on-state resistance (RDS(ON)) of the  
pass transistor. Therefore, if the linear regulator operates at less than the rated current, the dropout voltage for  
that current scales accordingly. Use Equation 1 to calculate the RDS(ON) of the device.  
VDO  
RDS(ON)  
=
IRATED  
(1)  
7.3.4 Foldback Current Limit  
The device has an internal current limit circuit that protects the regulator during transient high-load current faults  
or shorting events. The current limit is a hybrid brickwall-foldback scheme. The current limit transitions from a  
brickwall scheme to a foldback scheme at the foldback voltage (VFOLDBACK). In a high-load current fault with the  
output voltage above VFOLDBACK, the brickwall scheme limits the output current to the current limit (ICL). When the  
voltage drops below VFOLDBACK, a foldback current limit activates that scales back the current as the output  
voltage approaches GND. When the output is shorted, the device supplies a typical current called the short-  
circuit current limit (ISC). ICL and ISC are listed in the Electrical Characteristics table.  
The output voltage is not regulated when the device is in current limit. When a current limit event occurs, the  
device begins to heat up because of the increase in power dissipation. When the device is in brickwall current  
limit, the pass transistor dissipates power [(VIN – VOUT) × ICL]. When the device output is shorted and the output  
is below VFOLDBACK, the pass transistor dissipates power [(VIN – VOUT) × ISC]. If thermal shutdown is triggered, the  
device turns off. After the device cools down, the internal thermal shutdown circuit turns the device back on. If  
the output current fault condition continues, the device cycles between current limit and thermal shutdown. For  
more information on current limits, see the Know Your Limits application report.  
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Feature Description (continued)  
Figure 3 shows a diagram of the foldback current limit.  
VOUT  
Brickwall  
VOUT(NOM)  
VFOLDBACK  
Foldback  
0 V  
IOUT  
IRATED  
0 mA  
ISC  
ICL  
Figure 3. Foldback Current Limit  
7.3.5 Undervoltage Lockout (UVLO)  
The device has an independent undervoltage lockout (UVLO) circuit that monitors the input voltage, allowing a  
controlled and consistent turn on and off of the output voltage. To prevent the device from turning off if the input  
drops during turn on, the UVLO has hysteresis as specified in the Electrical Characteristics table.  
7.3.6 Thermal Shutdown  
The device contains a thermal shutdown protection circuit to disable the device when the junction temperature  
(TJ) of the pass transistor rises to TSD(shutdown) (typical). Thermal shutdown hysteresis assures that the device  
resets (turns on) when the temperature falls to TSD(reset) (typical).  
The thermal time-constant of the semiconductor die is fairly short, thus the device may cycle on and off when  
thermal shutdown is reached until power dissipation is reduced. Power dissipation during startup can be high  
from large VIN – VOUT voltage drops across the device or from high inrush currents charging large output  
capacitors. Under some conditions, the thermal shutdown protection disables the device before startup  
completes.  
For reliable operation, limit the junction temperature to the maximum listed in the Recommended Operating  
Conditions table. Operation above this maximum temperature causes the device to exceed its operational  
specifications. Although the internal protection circuitry of the device is designed to protect against thermal  
overall conditions, this circuitry is not intended to replace proper heat sinking. Continuously running the device  
into thermal shutdown or above the maximum recommended junction temperature reduces long-term reliability.  
7.3.7 Active Discharge  
The device has an internal pulldown MOSFET that connects an RPULLDOWN resistor to ground when the device is  
disabled to actively discharge the output voltage. The active discharge circuit is activated by the enable pin or by  
the undervoltage lockout (UVLO).  
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Feature Description (continued)  
Do not rely on the active discharge circuit for discharging a large amount of output capacitance after the input  
supply has collapsed because reverse current can possibly flow from the output to the input. This reverse current  
flow can cause damage to the device. Limit reverse current to no more than 5% of the device rated current for a  
short period of time.  
7.4 Device Functional Modes  
7.4.1 Device Functional Mode Comparison  
The Device Functional Mode Comparison table shows the conditions that lead to the different modes of  
operation. See the Electrical Characteristics table for parameter values.  
Table 1. Device Functional Mode Comparison  
PARAMETER  
OPERATING MODE  
VIN  
VEN  
IOUT  
TJ  
Normal operation  
Dropout operation  
VIN > VOUT(nom) + VDO and VIN > VIN(min)  
VIN(min) < VIN < VOUT(nom) + VDO  
VEN > VEN(HI)  
VEN > VEN(HI)  
IOUT < IOUT(max)  
IOUT < IOUT(max)  
TJ < TSD(shutdown)  
TJ < TSD(shutdown)  
Disabled  
(any true condition  
disables the device)  
VIN < VUVLO  
VEN < VEN(LOW)  
Not applicable  
TJ > TSD(shutdown)  
7.4.2 Normal Operation  
The device regulates to the nominal output voltage when the following conditions are met:  
The input voltage is greater than the nominal output voltage plus the dropout voltage (VOUT(nom) + VDO  
The output current is less than the current limit (IOUT < ICL  
The device junction temperature is less than the thermal shutdown temperature (TJ < TSD  
The enable voltage has previously exceeded the enable rising threshold voltage and has not yet decreased to  
less than the enable falling threshold  
)
)
)
7.4.3 Dropout Operation  
If the input voltage is lower than the nominal output voltage plus the specified dropout voltage, but all other  
conditions are met for normal operation, the device operates in dropout mode. In this mode, the output voltage  
tracks the input voltage. During this mode, the transient performance of the device becomes significantly  
degraded because the pass transistor is in the ohmic or triode region, and acts as a switch. Line or load  
transients in dropout can result in large output-voltage deviations.  
When the device is in a steady dropout state (defined as when the device is in dropout, VIN < VOUT(NOM) + VDO  
,
directly after being in a normal regulation state, but not during startup), the pass transistor is driven into the  
ohmic or triode region. When the input voltage returns to a value greater than or equal to the nominal output  
voltage plus the dropout voltage (VOUT(NOM) + VDO), the output voltage can overshoot for a short period of time  
while the device pulls the pass transistor back into the linear region.  
7.4.4 Disabled  
The output of the device can be shutdown by forcing the voltage of the enable pin to less than the maximum EN  
pin low-level input voltage (see the Electrical Characteristics table). When disabled, the pass transistor is turned  
off, internal circuits are shutdown, and the output voltage is actively discharged to ground by an internal  
discharge circuit from the output to ground.  
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8 Application and Implementation  
NOTE  
Information in the following applications sections is not part of the TI component  
specification, and TI does not warrant its accuracy or completeness. TI’s customers are  
responsible for determining suitability of components for their purposes. Customers should  
validate and test their design implementation to confirm system functionality.  
8.1 Application Information  
8.1.1 Recommended Capacitor Types  
The device is designed to be stable using low equivalent series resistance (ESR) ceramic capacitors at the input  
and output. Multilayer ceramic capacitors have become the industry standard for these types of applications and  
are recommended, but must be used with good judgment. Ceramic capacitors that employ X7R-, X5R-, and  
C0G-rated dielectric materials provide relatively good capacitive stability across temperature, whereas the use of  
Y5V-rated capacitors is discouraged because of large variations in capacitance.  
Regardless of the ceramic capacitor type selected, the effective capacitance varies with operating voltage and  
temperature. As a rule of thumb, expect the effective capacitance to decrease by as much as 50%. The input  
and output capacitors recommended in the Recommended Operating Conditions table account for an effective  
capacitance of approximately 50% of the nominal value.  
8.1.2 Input and Output Capacitor Requirements  
Although an input capacitor is not required for stability, good analog design practice is to connect a capacitor  
from IN to GND. This capacitor counteracts reactive input sources and improves transient response, input ripple,  
and PSRR. An input capacitor is recommended if the source impedance is more than 0.5 Ω. A higher value  
capacitor may be necessary if large, fast rise-time load or line transients are anticipated or if the device is located  
several inches from the input power source.  
Dynamic performance of the device is improved with the use of an output capacitor. Use an output capacitor  
within the range specified in the Recommended Operating Conditions table for stability.  
8.1.3 Load Transient Response  
The load-step transient response is the output voltage response by the LDO to a step in load current, whereby  
output voltage regulation is maintained. There are two key transitions during a load transient response: the  
transition from a light to a heavy load and the transition from a heavy to a light load. The regions shown in  
Figure 4 are broken down as follows. Regions A, E, and H are where the output voltage is in steady-state.  
tAt  
tCt  
tDt  
tEt  
tGt  
tHt  
B
F
Figure 4. Load Transient Waveform  
During transitions from a light load to a heavy load, the:  
Initial voltage dip is a result of the depletion of the output capacitor charge and parasitic impedance to the  
output capacitor (region B)  
Recovery from the dip results from the LDO increasing its sourcing current, and leads to output voltage  
regulation (region C)  
During transitions from a heavy load to a light load, the:  
Initial voltage rise results from the LDO sourcing a large current, and leads to the output capacitor charge to  
increase (region F)  
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Application Information (continued)  
Recovery from the rise results from the LDO decreasing its sourcing current in combination with the load  
discharging the output capacitor (region G)  
A larger output capacitance reduces the peaks during a load transient but slows down the response time of the  
device. A larger DC load also reduces the peaks because the amplitude of the transition is lowered and a higher  
current discharge path is provided for the output capacitor.  
8.1.4 Undervoltage Lockout (UVLO) Operation  
The UVLO circuit ensures that the device stays disabled before its input supply reaches the minimum operational  
voltage range, and ensures that the device shuts down when the input supply collapses. Figure 5 shows the  
UVLO circuit response to various input voltage events. The diagram can be separated into the following parts:  
Region A: The device does not start until the input reaches the UVLO rising threshold.  
Region B: Normal operation, regulating device.  
Region C: Brownout event above the UVLO falling threshold (UVLO rising threshold – UVLO hysteresis). The  
output may fall out of regulation but the device remains enabled.  
Region D: Normal operation, regulating device.  
Region E: Brownout event below the UVLO falling threshold. The device is disabled in most cases and the  
output falls because of the load and active discharge circuit. The device is reenabled when the UVLO rising  
threshold is reached by the input voltage and a normal start-up follows.  
Region F: Normal operation followed by the input falling to the UVLO falling threshold.  
Region G: The device is disabled when the input voltage falls below the UVLO falling threshold to 0 V. The  
output falls because of the load and active discharge circuit.  
UVLO Rising Threshold  
UVLO Hysteresis  
VIN  
C
VOUT  
tAt  
tBt  
tDt  
tEt  
tFt  
tGt  
Figure 5. Typical UVLO Operation  
8.1.5 Power Dissipation (PD)  
Circuit reliability demands that proper consideration be given to device power dissipation, location of the circuit  
on the printed circuit board (PCB), and correct sizing of the thermal plane. The PCB area around the regulator  
must be as free as possible of other heat-generating devices that cause added thermal stresses.  
As a first-order approximation, power dissipation in the regulator depends on the input-to-output voltage  
difference and load conditions. Use Equation 2 to approximate PD:  
PD = (VIN – VOUT) × IOUT  
(2)  
Power dissipation can be minimized, and thus greater efficiency achieved, by proper selection of the system  
voltage rails. Proper selection allows the minimum input-to-output voltage differential to be obtained. The low  
dropout of the TPS7A20 allows for maximum efficiency across a wide range of output voltages.  
The main heat conduction path for the device is through the thermal pad on the package. As such, the thermal  
pad must be soldered to a copper pad area under the device. This pad area contains an array of plated vias that  
conduct heat to any inner plane areas or to a bottom-side copper plane.  
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Application Information (continued)  
The maximum power dissipation determines the maximum allowable junction temperature (TJ) for the device.  
According to Equation 3, power dissipation and junction temperature are most often related by the junction-to-  
ambient thermal resistance (RθJA) of the combined PCB and device package and the temperature of the ambient  
air (TA). Equation 4 rearranges Equation 3 for output current.  
TJ = TA + (RθJA × PD)  
(3)  
(4)  
IOUT = (TJ – TA) / [RθJA × (VIN – VOUT)]  
Unfortunately, this thermal resistance (RθJA) is highly dependent on the heat-spreading capability built into the  
particular PCB design, and therefore varies according to the total copper area, copper weight, and location of the  
planes. The RθJA recorded in the Thermal Information table is determined by the JEDEC standard, PCB, and  
copper-spreading area, and is only used as a relative measure of package thermal performance. For a well-  
designed thermal layout, RθJA is actually the sum of the X2SON package junction-to-case (bottom) thermal  
resistance (RθJC(bot)) plus the thermal resistance contribution by the PCB copper.  
8.1.5.1 Estimating Junction Temperature  
The JEDEC standard now recommends the use of psi (Ψ) thermal metrics to estimate the junction temperatures  
of the LDO when in-circuit on a typical PCB board application. These metrics are not strictly speaking thermal  
resistances, but rather offer practical and relative means of estimating junction temperatures. These psi metrics  
are determined to be significantly independent of the copper-spreading area. The key thermal metrics (ΨJT and  
ΨJB) are used in accordance with Equation 5 and are given in the Thermal Information table.  
ΨJT : TJ = TT + ΨJT × PD and ΨJB : TJ = TB + ΨJB × PD  
where:  
PD is the power dissipated as explained in Equation 2  
TT is the temperature at the center-top of the device package  
TB is the PCB surface temperature measured 1 mm from the device package and centered on the package  
edge  
(5)  
8.1.5.2 Recommended Area for Continuous Operation  
The operational area of an LDO is limited by the dropout voltage, output current, junction temperature, and input  
voltage. The recommended area for continuous operation for a linear regulator is given in Figure 6 and can be  
separated into the following parts:  
Dropout voltage limits the minimum differential voltage between the input and the output (VIN – VOUT) at a  
given output current level. See the Dropout Operation section for more details.  
The rated output currents limits the maximum recommended output current level. Exceeding this rating  
causes the device to fall out of specification.  
The rated junction temperature limits the maximum junction temperature of the device. Exceeding this rating  
causes the device to fall out of specification and reduces long-term reliability.  
The shape of the slope is given by Equation 4. The slope is nonlinear because the maximum-rated  
junction temperature of the LDO is controlled by the power dissipation across the LDO; thus when VIN  
VOUT increases the output current must decrease.  
The rated input voltage range governs both the minimum and maximum of VIN – VOUT  
.
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Application Information (continued)  
Figure 6 shows the recommended area of operation for this device on a JEDEC-standard high-K board with a  
θJA as given in the Thermal Information table.  
R
Output current limited by  
dropout  
Rated output  
current  
Output current limited by thermals  
Limited by  
minimum VIN  
Limited by  
maximum VIN  
VIN œ VOUT (V)  
Figure 6. Region Description of Continuous Operation Regime  
The TPS7A20 is designed to meet the requirements of RF and analog circuits, by providing low noise, high  
PSRR, low quiescent current, and low line or load transient response figures. The device offers excellent noise  
performance without the need for a noise bypass capacitor and is stable with input and output capacitors with a  
value of 1 µF. The TPS7A20 delivers this performance in industry-standard packages such as DSBGA, X2SON,  
and SOT-23 which, for this device, are specified with an operating junction temperature (TJ) of –40°C to +125°C.  
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8.2 Typical Application  
Figure 7 shows the typical application circuit for the TPS7A20. Input and output capacitances may need to be  
increased above the 1 µF minimum for some applications.  
VOUT  
VIN  
OUTPUT  
1.0 µF  
INPUT  
1.0 µF  
TPS7A20  
VEN  
ENABLE  
GND  
GND  
SVA-30180501  
Figure 7. TPS7A20 Typical Application  
8.2.1 Design Requirements  
Table 2 summaries the design requirements for Figure 7.  
Table 2. Design Parameters  
DESIGN PARAMETER  
Input voltage range  
Output voltage  
EXAMPLE VALUE  
3.1 V to 6.0 V  
2.8 V  
Output current  
200 mA  
Output capacitor range  
Output capacitor ESR range  
0.7 µF to 10 µF  
5 mΩ to 80 mΩ  
8.2.2 Detailed Design Procedure  
The TPS7A20 is designed to meet the requirements of RF and analog circuits, by providing low noise, high  
PSRR, low quiescent current, and low line or load transient response figures. The device offers excellent noise  
performance without the need for a noise bypass capacitor and is stable with input and output capacitors with a  
value of 1 µF. The TPS7A20 delivers this performance in industry standard packages such as DSBGA, X2SON,  
and SOT-23 which, for this device, are specified with an operating junction temperature (TJ) of –40°C to 125°C.  
9 Power Supply Recommendations  
This device is designed to operate from an input supply voltage range of 1.6 V to 6.0 V. The input supply must  
be well regulated and free of spurious noise. To ensure that the output voltage is well regulated and dynamic  
performance is optimum, the input supply must be at least VOUT(nom) + 0.3 V or 1.6 V, whichever is greater. TI  
highly recommends using a 1-µF or greater input capacitor to reduce the impedance of the input supply,  
especially during transients.  
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10 Layout  
10.1 Layout Guidelines  
Place input and output capacitors as close to the device as possible.  
Use copper planes for device connections to optimize thermal performance.  
Place thermal vias around the device to distribute the heat.  
Do not place a thermal via directly beneath the thermal pad of the DQN package. A via can wick solder or  
solder paste away from the thermal pad joint during the soldering process, leading to a compromised solder  
joint on the thermal pad.  
10.2 Layout Examples  
V
V
OUT  
IN  
C
IN  
OUT  
5
C
1
2
3
OUT  
IN  
GND  
GND  
GND  
EN  
Enable  
4
N/C  
Figure 8. DBV Package (SOT-23) Typical Layout  
TPS7A20  
VOUT  
VIN  
1
2
4
3
COUT  
CIN  
Power Ground  
VEN  
Figure 9. DQN Package (X2SON) Typical Layout  
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Layout Examples (continued)  
VIN  
VOUT  
TPS7A20  
A1  
A2  
B2  
COUT  
CIN  
B1  
Power Ground  
VEN  
Figure 10. YWD Package (DSBGA) Typical Layout  
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11 Device and Documentation Support  
11.1 Device Support  
11.1.1 Device Nomenclature  
Table 3. Device Nomenclature(1)(2)  
PRODUCT  
VOUT  
XX(X) is the nominal output voltage. For output voltages with a resolution of 100 mV, two digits are used  
in the ordering number; otherwise, three digits are used (for example, 28 = 2.8 V; 125 = 1.25 V).  
P indicates an active output discharge feature. All members of the TPS7A20 family actively discharge  
the output when the device is disabled.  
TPS7A20xx(x)Pyyyz  
YYY is the package designator.  
Z is the package quantity. R is for reel (3000 pieces), T is for tape (250 pieces).  
(1) For the most current package and ordering information see the Package Option Addendum at the end of this document, or visit the  
device product folder on www.ti.com.  
(2) Output voltages from 0.8 V to 5.5 V in 25-mV increments are available. Contact the factory for details and availability.  
11.2 Receiving Notification of Documentation Updates  
To receive notification of documentation updates, navigate to the device product folder on ti.com. In the upper  
right corner, click on Alert me to register and receive a weekly digest of any product information that has  
changed. For change details, review the revision history included in any revised document.  
11.3 Community Resources  
TI E2E™ support forums are an engineer's go-to source for fast, verified answers and design help — straight  
from the experts. Search existing answers or ask your own question to get the quick design help you need.  
Linked content is provided "AS IS" by the respective contributors. They do not constitute TI specifications and do  
not necessarily reflect TI's views; see TI's Terms of Use.  
11.4 Trademarks  
E2E is a trademark of Texas Instruments.  
All other trademarks are the property of their respective owners.  
11.5 Electrostatic Discharge Caution  
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam  
during storage or handling to prevent electrostatic damage to the MOS gates.  
11.6 Glossary  
SLYZ022 TI Glossary.  
This glossary lists and explains terms, acronyms, and definitions.  
12 Mechanical, Packaging, and Orderable Information  
The following pages include mechanical, packaging, and orderable information. This information is the most  
current data available for the designated devices. This data is subject to change without notice and revision of  
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.  
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PACKAGE OPTION ADDENDUM  
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4-Sep-2020  
PACKAGING INFORMATION  
Orderable Device  
Status Package Type Package Pins Package  
Eco Plan  
Lead finish/  
Ball material  
MSL Peak Temp  
Op Temp (°C)  
Device Marking  
Samples  
Drawing  
Qty  
(1)  
(2)  
(3)  
(4/5)  
(6)  
PTPS7A2012PDBVR  
PTPS7A2012PDQNR  
PTPS7A2015PDQNR  
PTPS7A201825PDQNR  
PTPS7A20185PDQNR  
PTPS7A2018PDBVR  
PTPS7A2018PDQNR  
PTPS7A2025PDBVR  
PTPS7A2025PDQNR  
PTPS7A2028PDBVR  
PTPS7A2028PDQNR  
PTPS7A2029PDQNR  
PTPS7A2030PDBVR  
PTPS7A2030PDQNR  
PTPS7A2033PDBVR  
PTPS7A2033PDQNR  
PTPS7A2045PDQNR  
PTPS7A2050PDBVR  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
SOT-23  
X2SON  
X2SON  
X2SON  
X2SON  
SOT-23  
X2SON  
SOT-23  
X2SON  
SOT-23  
X2SON  
X2SON  
SOT-23  
X2SON  
SOT-23  
X2SON  
X2SON  
SOT-23  
DBV  
DQN  
DQN  
DQN  
DQN  
DBV  
DQN  
DBV  
DQN  
DBV  
DQN  
DQN  
DBV  
DQN  
DBV  
DQN  
DQN  
DBV  
5
4
4
4
4
5
4
5
4
5
4
4
5
4
5
4
4
5
3000  
3000  
3000  
3000  
3000  
3000  
3000  
3000  
3000  
3000  
3000  
3000  
3000  
3000  
3000  
3000  
3000  
3000  
TBD  
TBD  
TBD  
TBD  
TBD  
TBD  
TBD  
TBD  
TBD  
TBD  
TBD  
TBD  
TBD  
TBD  
TBD  
TBD  
TBD  
TBD  
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-40 to 125  
-40 to 125  
-40 to 125  
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-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
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TPS7A2012PDQNR  
TPS7A2015PDBVR  
PREVIEW  
PREVIEW  
X2SON  
SOT-23  
DQN  
DBV  
4
5
3000  
3000  
TBD  
TBD  
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-40 to 125  
Addendum-Page 1  
PACKAGE OPTION ADDENDUM  
www.ti.com  
4-Sep-2020  
Orderable Device  
Status Package Type Package Pins Package  
Eco Plan  
Lead finish/  
Ball material  
MSL Peak Temp  
Op Temp (°C)  
Device Marking  
Samples  
Drawing  
Qty  
(1)  
(2)  
(3)  
(4/5)  
(6)  
TPS7A2015PDQNR  
PREVIEW  
X2SON  
DQN  
4
3000  
Green (RoHS NIPDAU | NIPDAUAG Level-1-260C-UNLIM  
& no Sb/Br)  
-40 to 125  
JD  
JE  
TPS7A20185PDBVR  
TPS7A20185PDQNR  
PREVIEW  
PREVIEW  
SOT-23  
X2SON  
DBV  
DQN  
5
4
3000  
3000  
TBD  
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-40 to 125  
-40 to 125  
Green (RoHS NIPDAU | NIPDAUAG Level-1-260C-UNLIM  
& no Sb/Br)  
TPS7A2018PDBVR  
TPS7A2024PDBVR  
TPS7A2025PDBVR  
TPS7A2025PDQNR  
TPS7A2028PDBVR  
TPS7A2028PDQNR  
PREVIEW  
PREVIEW  
PREVIEW  
PREVIEW  
PREVIEW  
PREVIEW  
SOT-23  
SOT-23  
SOT-23  
X2SON  
SOT-23  
X2SON  
DBV  
DBV  
DBV  
DQN  
DBV  
DQN  
5
5
5
4
5
4
3000  
3000  
3000  
3000  
3000  
3000  
TBD  
TBD  
TBD  
TBD  
TBD  
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-40 to 125  
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-40 to 125  
-40 to 125  
-40 to 125  
Green (RoHS NIPDAU | NIPDAUAG Level-1-260C-UNLIM  
& no Sb/Br)  
JH  
JA  
TPS7A2029PDQNR  
TPS7A2030PDBVR  
TPS7A2030PDQNR  
TPS7A2033PDBVR  
TPS7A2033PDQNR  
PREVIEW  
PREVIEW  
PREVIEW  
PREVIEW  
PREVIEW  
X2SON  
SOT-23  
X2SON  
SOT-23  
X2SON  
DQN  
DBV  
DQN  
DBV  
DQN  
4
5
4
5
4
3000  
3000  
3000  
3000  
3000  
TBD  
TBD  
TBD  
TBD  
Call TI  
Call TI  
Call TI  
Call TI  
Call TI  
Call TI  
Call TI  
Call TI  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
-40 to 125  
Green (RoHS NIPDAU | NIPDAUAG Level-1-260C-UNLIM  
& no Sb/Br)  
TPS7A2045PDQNR  
TPS7A2050PDBVR  
PREVIEW  
PREVIEW  
X2SON  
SOT-23  
DQN  
DBV  
4
5
3000  
3000  
TBD  
TBD  
Call TI  
Call TI  
Call TI  
Call TI  
-40 to 125  
-40 to 125  
(1) The marketing status values are defined as follows:  
ACTIVE: Product device recommended for new designs.  
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.  
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.  
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.  
OBSOLETE: TI has discontinued the production of the device.  
(2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance  
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may  
reference these types of products as "Pb-Free".  
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.  
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based  
flame retardants must also meet the <=1000ppm threshold requirement.  
Addendum-Page 2  
PACKAGE OPTION ADDENDUM  
www.ti.com  
4-Sep-2020  
(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.  
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.  
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation  
of the previous line and the two combined represent the entire Device Marking for that device.  
(6)  
Lead finish/Ball material - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead finish/Ball material values may wrap to two  
lines if the finish value exceeds the maximum column width.  
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information  
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and  
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.  
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.  
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.  
Addendum-Page 3  
PACKAGE OUTLINE  
X2SON - 0.4 mm max height  
DQN0004A  
PLASTIC SMALL OUTLINE - NO LEAD  
1.05  
0.95  
A
B
1
1.05  
0.95  
PIN 1  
INDEX AREA  
C
0.4 MAX  
SEATING PLANE  
0.08  
NOTE 6  
+0.12  
-0.1  
0.05  
0.00  
0.48  
(0.05) TYP  
NOTE 6  
2
1
3
EXPOSED  
THERMAL PAD  
5
2X 0.65  
(0.07) TYP  
NOTE 5  
4
0.28  
PIN 1 ID  
(OPTIONAL)  
NOTE 4  
4X  
0.15  
(0.11)  
0.3  
0.2  
0.1  
C A B  
0.05  
C
0.30  
0.15  
3X  
4215302/E 12/2016  
NOTES:  
1. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing  
per ASME Y14.5M.  
2. This drawing is subject to change without notice.  
3. The package thermal pad must be soldered to the printed circuit board for optimal thermal and mechanical performance.  
4. Features may not exist. Recommend use of pin 1 marking on top of package for orientation purposes.  
5. Shape of exposed side leads may differ.  
6. Number and location of exposed tie bars may vary.  
www.ti.com  
EXAMPLE BOARD LAYOUT  
X2SON - 0.4 mm max height  
DQN0004A  
PLASTIC SMALL OUTLINE - NO LEAD  
(0.86)  
SYMM  
SEE DETAIL  
4X  
4X (0.36)  
(0.03)  
4
4X (0.21)  
1
5
SYMM  
(0.65)  
4X (0.18)  
2
3
(
0.48)  
(0.22) TYP  
EXPOSED METAL  
CLEARANCE  
LAND PATTERN EXAMPLE  
SCALE: 40X  
0.05 MIN  
ALL AROUND  
SOLDER MASK  
OPENING  
EXPOSED METAL  
METAL UNDER  
SOLDER MASK  
SOLDER MASK  
DEFINED  
SOLDER MASK DETAIL  
4215302/E 12/2016  
NOTES: (continued)  
7. This package is designed to be soldered to a thermal pad on the board. For more information, see Texas Instruments literature  
number SLUA271 (www.ti.com/lit/slua271)  
.
8. If any vias are implemented, it is recommended that vias under paste be filled, plugged or tented.  
www.ti.com  
EXAMPLE STENCIL DESIGN  
X2SON - 0.4 mm max height  
DQN0004A  
PLASTIC SMALL OUTLINE - NO LEAD  
(0.9)  
SYMM  
4X (0.4)  
4X (0.03)  
4
1
4X (0.21)  
5
SYMM  
(0.65)  
SOLDER MASK  
EDGE  
4X (0.22)  
2
3
(
0.45)  
4X (0.235)  
SOLDER PASTE EXAMPLE  
BASED ON 0.075 - 0.1mm THICK STENCIL  
EXPOSED PAD  
88% PRINTED SOLDER COVERAGE BY AREA  
SCALE: 60X  
4215302/E 12/2016  
NOTES: (continued)  
9. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate  
design recommendations.  
www.ti.com  
PACKAGE OUTLINE  
DBV0005A  
SOT-23 - 1.45 mm max height  
S
C
A
L
E
4
.
0
0
0
SMALL OUTLINE TRANSISTOR  
C
3.0  
2.6  
0.1 C  
1.75  
1.45  
1.45  
0.90  
B
A
PIN 1  
INDEX AREA  
1
2
5
2X 0.95  
1.9  
3.05  
2.75  
1.9  
4
3
0.5  
5X  
0.3  
0.15  
0.00  
(1.1)  
TYP  
0.2  
C A B  
0.25  
GAGE PLANE  
0.22  
0.08  
TYP  
8
0
TYP  
0.6  
0.3  
TYP  
SEATING PLANE  
4214839/E 09/2019  
NOTES:  
1. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing  
per ASME Y14.5M.  
2. This drawing is subject to change without notice.  
3. Refernce JEDEC MO-178.  
4. Body dimensions do not include mold flash, protrusions, or gate burrs. Mold flash, protrusions, or gate burrs shall not  
exceed 0.15 mm per side.  
www.ti.com  
EXAMPLE BOARD LAYOUT  
DBV0005A  
SOT-23 - 1.45 mm max height  
SMALL OUTLINE TRANSISTOR  
PKG  
5X (1.1)  
1
5
5X (0.6)  
SYMM  
(1.9)  
2
3
2X (0.95)  
4
(R0.05) TYP  
(2.6)  
LAND PATTERN EXAMPLE  
EXPOSED METAL SHOWN  
SCALE:15X  
SOLDER MASK  
OPENING  
SOLDER MASK  
OPENING  
METAL UNDER  
SOLDER MASK  
METAL  
EXPOSED METAL  
EXPOSED METAL  
0.07 MIN  
ARROUND  
0.07 MAX  
ARROUND  
NON SOLDER MASK  
DEFINED  
SOLDER MASK  
DEFINED  
(PREFERRED)  
SOLDER MASK DETAILS  
4214839/E 09/2019  
NOTES: (continued)  
5. Publication IPC-7351 may have alternate designs.  
6. Solder mask tolerances between and around signal pads can vary based on board fabrication site.  
www.ti.com  
EXAMPLE STENCIL DESIGN  
DBV0005A  
SOT-23 - 1.45 mm max height  
SMALL OUTLINE TRANSISTOR  
PKG  
5X (1.1)  
1
5
5X (0.6)  
SYMM  
(1.9)  
2
3
2X(0.95)  
4
(R0.05) TYP  
(2.6)  
SOLDER PASTE EXAMPLE  
BASED ON 0.125 mm THICK STENCIL  
SCALE:15X  
4214839/E 09/2019  
NOTES: (continued)  
7. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate  
design recommendations.  
8. Board assembly site may have different recommendations for stencil design.  
www.ti.com  
IMPORTANT NOTICE AND DISCLAIMER  
TI PROVIDES TECHNICAL AND RELIABILITY DATA (INCLUDING DATASHEETS), DESIGN RESOURCES (INCLUDING REFERENCE  
DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES “AS IS”  
AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS AND IMPLIED, INCLUDING WITHOUT LIMITATION ANY  
IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD  
PARTY INTELLECTUAL PROPERTY RIGHTS.  
These resources are intended for skilled developers designing with TI products. You are solely responsible for (1) selecting the appropriate  
TI products for your application, (2) designing, validating and testing your application, and (3) ensuring your application meets applicable  
standards, and any other safety, security, or other requirements. These resources are subject to change without notice. TI grants you  
permission to use these resources only for development of an application that uses the TI products described in the resource. Other  
reproduction and display of these resources is prohibited. No license is granted to any other TI intellectual property right or to any third  
party intellectual property right. TI disclaims responsibility for, and you will fully indemnify TI and its representatives against, any claims,  
damages, costs, losses, and liabilities arising out of your use of these resources.  
TI’s products are provided subject to TI’s Terms of Sale (www.ti.com/legal/termsofsale.html) or other applicable terms available either on  
ti.com or provided in conjunction with such TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable  
warranties or warranty disclaimers for TI products.  
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265  
Copyright © 2020, Texas Instruments Incorporated  

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