RT9193T-18PQW [RICHTEK]
300mA, Thermal Folded Back CMOS LDO Regulator;![RT9193T-18PQW](http://pdffile.icpdf.com/pdf2/p00325/img/icpdf/RT9193T-18PQ_1997951_icpdf.jpg)
型号: | RT9193T-18PQW |
厂家: | ![]() |
描述: | 300mA, Thermal Folded Back CMOS LDO Regulator |
文件: | 总12页 (文件大小:296K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
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RT9193T
300mA, Thermal Folded Back CMOS LDO Regulator
General Description
Features
z Short Circuit Thermal Folded Back Protection
z Ultra-Low-Noise for RF Application
z Ultra-Fast Response in Line/Load Transient
z Quick Start-Up (Typically 50us)
The RT9193T is designed for portable RF and wireless
applications with demanding performance and space
requirements. The RT9193T performance is optimized for
battery-powered systems to deliver ultra low noise and
low quiescent current.Anoise bypass pin is available for
further reduction of output noise. Regulator ground current
increases only slightly in dropout, further prolonging the
battery life. The RT9193T also works with low-ESR
ceramic capacitors, reducing the amount of board space
necessary for power applications, critical in hand-held
wireless devices. The RT9193Tconsumes less than 0.01μA
in shutdown mode and has fast turn-on time less than
50μs. RT9193T is short circuit thermal folded back
protected. RT9193T lowers its OTP trip point from 165°C
to 110°Cwhen output short circuit occurs (VOUT < 0.4V)
providing maximum safety to end users. The other features
include ultra low dropout voltage, high output accuracy,
current limiting protection, and high ripple rejection ratio.
Available in the 5-lead of SC-70, SOT-23 and
WDFN-6L 2x2 packages.
z < 0.01uA Standby Current When Shutdown
z Low Dropout : 220mV @ 300mA
z Wide Operating Voltage Ranges : 2.5V to 5.5V
z TTL-Logic-Controlled Shutdown Input
z Low Temperature Coefficient
z Current Limiting Protection
z Thermal Shutdown Protection
z Only 1uF Output Capacitor Required for Stability
z High Power Supply Rejection Ratio
z Custom Voltage Available
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z CDMA/GSM Cellular Handsets
z Battery-Powered Equipment
z Laptop, Palmtops,Notebook Computers
z Hand-Held Instruments
Ordering Information
z PCMCIA Cards
RT9193T-
z Portable InformationAppliances
Package Type
U5 : SC-70-5
B : SOT-23-5
Marking Information
QW : WDFN-6L 2x2 (W-Type)
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
Output Voltage
15 : 1.5V
16 : 1.6V
Pin Configurations
(TOP VIEW)
1
2
3
6
5
4
EN
GND
VIN
BP
:
34 : 3.4V
35 : 3.5V
NC
7
VOUT
1H : 1.85V
2H : 2.85V
Note :
WDFN-6L 2x2
VOUT
BP
Richtek products are :
5
4
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
2
3
` Suitable for use in SnPb or Pb-free soldering processes.
VIN GND EN
SC-70-5/SOT-23-5
DS9193T-06 April 2011
www.richtek.com
1
RT9193T
Typical Application Circuit
RT9193T
V
VIN
VOUT
V
OUT
IN
C
C
IN
OUT
GND
EN
1uF
1uF
Chip Enable
BP
C
BP
22nF
Functional Pin Description
Pin Name
VIN
Pin Function
Power Input Voltage
Ground
GND
Chip Enable (Active High). Note that this pin is high impedance. There should be a pull low 100kΩ
EN
resistor connected to GND when the control signal is floating.
BP
Reference Noise Bypass
Output Voltage
VOUT
Function Block Diagram
EN
Shutdown
and
Logic Control
VIN
Quick
Start
V
REF
BP
MOSFET
Driver
+
Error
Amplifier
VOUT
GND
Current-Limit
and
Thermal
Protection
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2
DS9193T-06 April 2011
RT9193T
Absolute Maximum Ratings (Note 1)
z Supply Input Voltage ---------------------------------------------------------------------------------------------------- 6V
z PowerDissipation, PD @ TA = 25°C
SC-70-5 -------------------------------------------------------------------------------------------------------------------- 300mW
SOT-23-5------------------------------------------------------------------------------------------------------------------- 400mW
WDFN-6L2x2 ------------------------------------------------------------------------------------------------------------- 606mW
z Package Thermal Resistance (Note 2)
SOT-70-5, θJA ------------------------------------------------------------------------------------------------------------- 333°C/W
SOT-23-5, θJA ------------------------------------------------------------------------------------------------------------- 250°C/W
WDFN-6L 2x2, θJA ------------------------------------------------------------------------------------------------------- 165°C/W
z Lead Temperature (Soldering, 10 sec.) ----------------------------------------------------------------------------- 260°C
z StorageTemperature Range ------------------------------------------------------------------------------------------- −65°C to 150°C
z ESD Susceptibility (Note 3)
HBM (Human Body Mode) --------------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ---------------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions (Note 4)
z Supply Input Voltage ---------------------------------------------------------------------------------------------------- 2.5V to 5.5V
z Ambient Temperature Range ------------------------------------------------------------------------------------------ −40°C to 85°C
z Junction Temperature Range ------------------------------------------------------------------------------------------ −40°C to 125°C
Electrical Characteristics
(VIN = VOUT + 1V, CIN = COUT = 1uF, CBP = 22nF, TA = 25°C, unless otherwise specified)
Parameter
Output Voltage Accuracy
Current Limit
Symbol
ΔVOUT IOUT = 1mA
ILIM RLOAD = 1Ω
IQ
Test Conditions
Min
−2
Typ
--
Max
+2
Unit
%
360
--
400
90
--
mA
μA
≥
Quiescent Current
VEN 1.2V, IOUT = 0mA
130
200
300
IOUT = 200mA
170
220
Dropout Voltage
Line Regulation
(Note 5)
VDROP
mV
%
I
OUT = 300mA
IN = (VOUT + 0.3V) to 5.5V,
IOUT = 1mA
--
--
V
ΔVLINE
--
0.3
Load Regulation
ΔVLOAD 1mA < IOUT < 300mA
--
--
--
0.01
0
0.6
1
%
Standby Current
ISTBY
IIBSD
VIL
VEN = GND, Shutdown
VEN = GND or VIN
uA
nA
EN Input Bias Current
--
100
0.4
--
Logic-Low Voltage
Logic-High Voltage
VIN = 3V to 5.5V, Shutdown
VIN = 3V to 5.5V, Start-Up
--
--
EN Threshold
V
VIH
1.2
--
10Hz to 100kHz, IOUT = 200mA
COUT = 1uF
Output Noise Voltage
eNO
--
100
--
uVRMS
Power Supply
Rejection Rate
f = 100Hz
f = 10kHz
--
--
--
−70
−50
165
--
--
--
PSRR
TSD
COUT = 1uF, IOUT = 10mA
dB
Thermal Shutdown Temperature
°C
DS9193T-06 April 2011
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3
RT9193T
Parameter
Symbol
Test Conditions
Min
--
Typ
30
Max
--
Unit
°C
Thermal Shutdown Temperature
Hysteresis
ΔTSD
Thermal Folded Back
--
110
--
°C
Note 1. Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are for
stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended
periods may remain possibility to affect device reliability.
Note 2. θJA is measured in the natural convection at TA = 25°C on a low effective thermal conductivity test board
(Single Layer, 1S) of JEDEC 51-3 thermal measurement standard.
Note 3. Devices are ESD sensitive. Handling precaution is recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
Note 5. The dropout voltage is defined as VIN -VOUT, which is measured when VOUT is VOUT(NORMAL) − 100mV.
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4
DS9193T-06 April 2011
RT9193T
Typical Operating Characteristics
Output Voltage vs. Temperature
Quiescent Current vs. Temperature
1.8
95
90
85
80
75
70
65
60
RT9193T-15PU5
VIN = 3.3V
CIN = COUT = 1uF X7R
RT9193T-15PU5
VIN = 3.3V
CIN = COUT = 1uF X7R
1.7
1.6
1.5
1.4
1.3
1.2
-50
-25
0
25
50
75
100
125
-50
-25
0
25
50
75
100
125
(°C)
Temperature
Temperature
(°C)
Dropout Voltage vs. Load Current
PSRR
20
0
300
250
200
150
100
50
VIN = 4V to 5V
CIN = COUT = 1uF, X7R
RT9193T-33PB
CIN = COUT = 1uF
TJ = 125°C
-20
-40
-60
-80
TJ = 25°C
TJ = -40°C
ILOAD = 100mA
ILOAD = 10mA
0
10
100
1K
10K
100K
1M
0
0.05
0.1
0.15
0.2
0.25
0.3
Frequency (Hz)
Load Current (A)
EN Pin Shoutdown Threshold vs. Temperature
EN Pin Shutdown Response
1.75
RT9193T-15PU5
VIN = 3.3V
CIN = COUT = 1uF X7R
VIN = 5V
CIN = COUT = 1uF
RT9193T-28PU5
No Load
10
1.5
1.25
1
5
0
2
1
0
0.75
0.5
-50
-25
0
25
50
75
100
125
Time (500μs/Div)
Temperature (°C)
DS9193T-06 April 2011
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5
RT9193T
Load Transient Response
Load Transient Response
VIN = 5V, VOUT = 2.8V
CIN = COUT = 1uF
ILOAD = 1mA to 60mA
VIN = 5V, VOUT = 2.8V
CIN = COUT = 1uF
ILOAD = 1mA to 250mA
100
50
0
400
200
0
20
0
50
0
-20
-50
Time (500μs/Div)
Time (500μs/Div)
Line Transient Response
Line Transient Response
VIN = 4V to 5V
COUT = 1uF
RT9193T-25PB
ILOAD = 1mA
VIN = 4V to 5V
COUT = 1uF
RT9193T-25PB
ILOAD = 100mA
6
5
4
6
5
4
10
0
10
0
-10
-10
Time (100μs/Div)
Time (50μs/Div)
Noise
Noise
RT9193T-30PB
ILOAD = 50mA
VIN = 4.5V
CIN = COUT = 1uF, X7R
VIN = 4.5V
CIN = COUT = 1uF, X7R
RT9193T-15PU5
ILOAD = 50mA
200
100
0
200
100
0
-100
-200
-100
-200
f = 10Hz to 100kHz
f = 10Hz to 100kHz
Time (10ms/Div)
Time (10ms/Div)
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6
DS9193T-06 April 2011
RT9193T
Start Up
VIN = 5V
CIN = COUT = 1uF
RT9193T-28PU5
No Load
10
5
0
2
1
0
Time (10μs/Div)
DS9193T-06 April 2011
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7
RT9193T
Applications Information
Like any low-dropout regulator, the external capacitors used
with the RT9193T must be carefully selected for regulator
stability and performance. Using a capacitor whose value
is > 1μF on the RT9193T input and the amount of
capacitance can be increased without limit. The input
capacitor must be located a distance of not more than
0.5 inch from the input pin of the IC and returned to a
clean analog ground. Any good quality ceramic or
tantalum can be used for this capacitor. The capacitor
with larger value and lower ESR (equivalent series
resistance) provides better PSRR and line-transient
response. The output capacitor must meet both
requirements for minimum amount of capacitance and
ESR in all LDOs application. The RT9193T is designed
specifically to work with low ESR ceramic output capacitor
in space-saving and performance consideration. Using
a ceramic capacitor whose value is at least 1μF with ESR
is > 25mΩ on the RT9193T output ensures stability. The
RT9193T still works well with output capacitor of other
types due to the wide stable ESR range. Figure 1 shows
the curves of allowable ESR range as a function of load
current for various output capacitor values. Output
capacitor of larger capacitance can reduce noise and
improve load transient response, stability, and PSRR. The
output capacitor should be located not more than 0.5
inch from the VOUT pin of the RT9193T and returned to a
clean analog ground.
Bypass Capacitor and Low Noise
Connecting a 22nF between the BP pin and GND pin
significantly reduces noise on the regulator output, it is
critical that the capacitor connection between the BP pin
andGNDpin be direct and PCB traces should be as short
as possible. There is a relationship between the bypass
capacitor value and the LDO regulator turn on time. DC
leakage on this pin can affect the LDO regulator output
noise and voltage regulation performance.
Enable Function
The RT9193T features an LDO regulator enable/disable
function. To assure the LDO regulator will switch on, the
EN turn on control level must be greater than 1.2 volts.
The LDO regulator will go into the shutdown mode when
the voltage on the EN pin falls below 0.4 volts. For to
protecting the system, the RT9193T have a quick-
discharge function. If the enable function is not needed in
a specific application, it may be tied to VIN to keep the
LDO regulator in a continuously on state.
Thermal Considerations
Thermal protection limits power dissipation in RT9193T.
When the operation junction temperature exceeds 165°C,
the OTP circuit starts the thermal shutdown function turn
the pass element off. The pass element turn on again
after the junction temperature cools by 30°C.
RT9193T lowers its OTP trip level from 165°C to 110°C
when output short circuit occurs (VOUT < 0.4V) as shown
in Figure 2. This limits IC case temperature under 100°C
and provides maximum safety to end users when output
short circuit occurs.
Region of Stable COUT ESR vs. Load Current
100
Instable
10
For continue operation, do not exceed absolute maximum
operation junction temperature 125°C. The power
dissipation definition in device is :
1
Stable
0.10
0.01
0.00
PD = (VIN−VOUT) x IOUT + VIN x IQ
The maximum power dissipation depends on the thermal
resistance of IC package, PCB layout, the rate of
surroundings airflow and temperature difference between
junction to ambient. The maximum power dissipation can
be calculated by following formula :
RT9193T-15PU5
CIN = COUT = 1uF, X7R
Simulation Verify
0
50
100
150
200
250
300
Load Current (mA)
Figure 1
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8
DS9193T-06 April 2011
RT9193T
PD(MAX) = ( TJ(MAX) − TA ) /θJA
700
600
500
400
300
200
100
0
WDFN-6L 2x2
Where TJ(MAX) is the maximum operation junction
temperature 125°C, TA is the ambient temperature and
the θJA is the junction to ambient thermal resistance.
SOT-23-5
SC 70-5
For recommended operating conditions specification of
RT9193T, where TJ(MAX) is the maximum junction
temperature of the die (125°C) and TA is the maximum
ambient temperature. The junction to ambient thermal
resistance (θJA is layout dependent) for SOT-23-5 package
is 250°C/W, SC-70-5 package is 333°C/W and
WDFN-6L 2x2 package is 165°C/W on standard JEDEC
51-3 thermal test board. The maximum power dissipation
at TA = 25°C can be calculated by following formula :
0
25
50
75
100
125
150
Ambient Temperature (°C)
Figure 3.Derating Curve for Packages
PD(MAX) = (125°C−25°C) / 333 = 300mW (SC-70-5)
PD(MAX) = (125°C−25°C) / 250 = 400mW (SOT-23-5)
PD(MAX) = (125°C−25°C) / 165 = 606mW (WDFN-6L 2x2)
The maximum power dissipation depends on operating
ambient temperature for fixed TJ(MAX) and thermal
resistance θJA. For RT9193T packages, the Figure 3 of
derating curves allows the designer to see the effect of
rising ambient temperature on the maximum power
allowed.
V
Short to GND
OUT
0.4V
V
I
OUT
OUT
TSD
165 °C
OTP Trip Point
110 C
°
°
110 C
80 °C
IC Temperature
Figure 2. Short Circuit Thermal Folded Back Protection
when Output Short Circuit Occurs
DS9193T-06 April 2011
www.richtek.com
9
RT9193T
Outline Dimension
H
D
L
B
C
A
b
A1
e
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
A1
B
0.800
0.000
1.150
0.150
1.800
1.800
1.100
0.100
1.350
0.400
2.450
2.250
0.031
0.000
0.045
0.006
0.071
0.071
0.044
0.004
0.054
0.016
0.096
0.089
b
C
D
e
0.650
0.026
H
L
0.080
0.210
0.260
0.460
0.003
0.008
0.010
0.018
SC-70-5 Surface Mount Package
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DS9193T-06 April 2011
RT9193T
H
D
L
B
C
A
b
A1
e
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
1.295
0.152
1.803
0.559
2.997
3.099
1.041
0.254
0.610
Min
Max
A
A1
B
0.889
0.000
1.397
0.356
2.591
2.692
0.838
0.080
0.300
0.035
0.000
0.055
0.014
0.102
0.106
0.033
0.003
0.012
0.051
0.006
0.071
0.022
0.118
0.122
0.041
0.010
0.024
b
C
D
e
H
L
SOT-23-5 Surface Mount Package
DS9193T-06 April 2011
www.richtek.com
11
RT9193T
D
D2
L
E
E2
SEE DETAIL A
1
b
e
2
1
2
1
A
A3
A1
DETAILA
Pin #1 ID and Tie Bar Mark Options
Note : The configuration of the Pin #1 identifier is optional,
but must be located within the zone indicated.
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
A1
A3
b
0.700
0.000
0.175
0.200
1.950
1.000
1.950
0.500
0.800
0.050
0.250
0.350
2.050
1.450
2.050
0.850
0.028
0.000
0.007
0.008
0.077
0.039
0.077
0.020
0.031
0.002
0.010
0.014
0.081
0.057
0.081
0.033
D
D2
E
E2
e
0.650
0.026
L
0.300
0.400
0.012
0.016
W-Type 6L DFN 2x2 Package
Richtek Technology Corporation
Headquarter
Richtek Technology Corporation
Taipei Office (Marketing)
5F, No. 20, Taiyuen Street, Chupei City
Hsinchu, Taiwan, R.O.C.
5F, No. 95, Minchiuan Road, Hsintien City
Taipei County, Taiwan, R.O.C.
Tel: (8863)5526789 Fax: (8863)5526611
Tel: (8862)86672399 Fax: (8862)86672377
Email: marketing@richtek.com
Information that is provided by Richtek Technology Corporation is believed to be accurate and reliable. Richtek reserves the right to make any change in circuit
design, specification or other related things if necessary without notice at any time. No third party intellectual property infringement of the applications should be
guaranteed by users when integrating Richtek products into any application. No legal responsibility for any said applications is assumed by Richtek.
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12
DS9193T-06 April 2011
相关型号:
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