EUP7982-28MIR0 [EUTECH]
300mA Low-Noise Ultra Low-Dropout CMOS Regulator with Fault Indicator; 300mA低压噪音超低压降CMOS稳压器，故障指示器
| 型号： | EUP7982-28MIR0 |
| 厂家： | 
EUTECH MICROELECTRONICS INC |
| 描述： | 300mA Low-Noise Ultra Low-Dropout CMOS Regulator with Fault Indicator |
| 文件： | 总10页 (文件大小：227K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
EUP7982
300mA Low-Noise Ultra Low-Dropout
CMOS Regulator with Fault Indicator
FEATURE
DESCRIPTION
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2.5V to 5.5V Input Range
The EUP7982 low-noise, low-dropout, linear
regulator operates from a 2.5V to 5.5V input and is
guaranteed to deliver 300mA.
300mA Guaranteed Output Current
60dB PSRR at 1kHz
50µV RMS Output Voltage Noise (10Hz to
100kHz)
The EUP7982 is stable with small 2.2µF ceramic
capacitor. Its performance suits battery powered
applications because of its shutdown mode (60 nA
typ), low quiescent current (110µA typ), and LDO
voltage (140mV typ). The low dropout voltage
allows for more utilization of a battery’s available
energy by operating closer to its end-of-life voltage.
An output fault-detection circuit indicates loss of
regulation.
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140mV Dropout at 300mA
Low 110µA No-Load Supply Current
≤1µA Shutdown Current
Fast Start-up Time
Stable With 2.2µF Ceramic Output Capacitors
Thermal Shutdown and Short-Circuit Protection
Fault Indicator
RoHS Compliant and 100% Lead (Pb)-Free
The EUP7982 is available in MSOP package with
1.8V, 2.5v, 2.8V, 3V, 3.3V, and adjustable versions.
APPLICATIONS
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Wireless Handsets
DSP Core Power
Battery Powered Electronics
Portable Information Appliances
Block Diagram
Figure1.
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EUP7982
Typical Application Circuit
Figure2. Fixed Voltage LDO Regulator
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EUP7982
Pin Configurations
Part Number
Pin Configurations
EUP7982
MSOP-8
Pin Description
PIN
OUT
IN
PIN
1,4
2
DESCRIPTION
Output voltage of the LDO
Input voltage of the LDO
GND
3
Common Ground
Output voltage set. Not externally connected for the fixed versions.
Connect ot resistor-divider for adjustable output voltage.
SET
5
CC
6
7
Compensation capacitor for noise reduction
places the entire device in shutdown mode when held low.
SHDN
SHDN
Fault output. A high-impedance, open-drain output. If the circuit is out of
regulation, goes low. In shutdown, this pin is high
8
FAULT
FAULT
Impedance. Connect to GND if unused
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EUP7982
Ordering Information
Order Number
Package Type
Marking
Operating Temperature range
CA □ □
EUP7982MIR1
EUP7982MIR0
MSOP-8
-40°C to 85°C
P7982
C1 □ □
EUP7982-18MIR1
EUP7982-18MIR0
MSOP-8
MSOP-8
MSOP-8
MSOP-8
MSOP-8
-40°C to 85°C
-40°C to 85°C
-40°C to 85°C
-40°C to 85°C
-40°C to 85°C
P7982
C2 □ □
EUP7982-25MIR1
EUP7982-25MIR0
P7982
C6 □ □
EUP7982-28MIR1
EUP7982-28MIR0
P7982
C5 □ □
EUP7982-30MIR1
EUP7982-30MIR0
P7982
C3 □ □
EUP7982-33MIR1
EUP7982-33MIR0
P7982
EUP7982 □ □ □ □ □ □
Lead Free Code
1: Lead Free 0: Lead
Packing
R: Tape & Reel
Operating temperature range
I: Industry Standard
C: Commercial
Package Type
M: MSOP
Output Voltage
18: 1.8V
25: 2.5V
28: 2.8V
30: 3.0V
33: 3.3V
Blank: Adjustable
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EUP7982
Absolute Maximum Ratings
VIN, VOUT, VSHDN , VSET , VCC, VFAULT
--------------------------------------------- -0.3V to 6V
Fault Sink Current --------------------------------------------------------------------------------- 20mA
Storage Temperature Range ------------------------------------------------------------- -65°C to 160°C
Junction Temperature (TJ) ------------------------------------------------------------------------
Lead Temperature (10 sec.) -------------------------------------------------------------------------
150°C
260°C
Electrical Characteristics
Unless otherwise specified, all limits guaranteed for VIN= VO +0.5V, VSHDN=VIN, CIN=COUT=2.2µF, CCC=22nF,
TJ =25°C. (Boldface limits apply for the operating temperature extremes: -40°C and 85°C)
EUP7982
Symbol
Parameter
Conditions
Unit
Min
2.5
-2
Typ
Max.
5.5
+2
VIN
Input Voltage
V
100µA ≤ IOUT ≤ 300mA
VIN=VO+0.5V,
% of
∆ VO Output Voltage Tolerance
VOUT(NOM)
-3
+3
SET= OUT for the Adjust Versions
Adjust Version Only
VO
IO
Output Adjust Range
Maximum Output Current
V
mA
mA
1.25
300
5.5
Average DC Current Rating
ILIMIT Output Current Limit
600
110
240
0.06
0.4
90
140
IOUT=0mA
200
Supply Current
µA
µA
IOUT=300mA
IQ
Shutdown Supply Current
VDO Dropout Voltage
1
VO =0V, SHDN =GND
IOUT =1mA
IOUT =200mA
mV
200
0.1
I
OUT =300mA
IOUT = 1mA, (VO +0.5V)≤VI
Line Regulation
0.05
0.002
50
%/V
-0.1
≤ 5.5V
∆ VO
Load Regulation
%/mA
µVRMS
100µA ≤ IOUT ≤ 300mA
I
OUT =10mA, 10Hz ≤ f
en
Output Voltage Noise
≤ 100kHz
2
VIH,(VO+0.5V) ≤VI ≤ 5.5V
VIL,(VO+0.5V) ≤ VI ≤ 5.5V
V
VSHDN
SHDN Input Threshold
0.4
100
2.5
0.1
0.1
nA
nA
mV
V
ISHDN
ISET
SHDN Input Bias Current
SET Input Leakage
SHDN =GND or IN
SET = 1.3V, Adjust Version Only
150
0.13
0.1
VO ≥ 2.5V, IOUT =200mA
ISINK=2mA
280
0.25
100
FAULT Detection Voltage
FAULT Output Low Voltage
IFAULT FAULT Off-Leakage Current
VFAULT
nA
FAULT =3.6V, SHDN =0V
TSD
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
160
20
°C
µs
C
OUT =10µF, VO at 90% of Final
TON Start-Up Time
80
Value
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EUP7982
Typical Operating Characteristics
Unless otherwise specified, VIN = VO + 0.5V, CIN=COUT = 2.2 µF, CCC= 22 nF, TJ= 25°C, VSHDN=VIN
Output Voltage Change vs Temperature
DropoutVoltagevs.LoadCurrent
0.2
0.0
160
140
120
100
80
-0.2
-0.4
-0.6
-0.8
Tj=-40
Tj=25
Tj=85
60
40
20
0
0
50
100 150 200 250 300
LoadCurrent(mA)
Temperature
FAULT DectectThresholdvsLoadCurrent
SupplyCurrentvs.InputVoltage(SOT25)
200
175
150
125
100
75
175
150
125
100
75
TA=25
TA=85
Tj=-40
50
50
25
25
0
0
0
50
100
150
200
250
300
2.6
3
3.4 3.8 4.2 4.6
5
5.4 5.8
InputVoltage(V)
LoadCurrent(mA)
Supply CurrentvsLoadCurrent
300
250
200
150
100
50
Tj=25
Tj=85
TJ=-40
0
0
50
100
150
200
250
300
LoadCurrent(mA)
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EUP7982
Output Noise (10kHz to 100kHz)
Line Transient Response
Load Transient
Shutdown Response
Power-up Response
Power-down Response
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EUP7982
Application Information
External Capacitors
Noise Bypass Capacitor
Connecting a 33nF capacitor between the CBYPASS pin and
ground significantly reduces noise on the regulator output.
This cap is connected directly to a high impedance node
in the bandgap reference circuit. Any significant loading
on this node will cause a change on the regulated output
voltage. For this reason, DC leakage current through this
pin must be kept as low as possible for best output
voltage accuracy. The types of capacitors best suited for
the noise bypass capacitor are ceramic and film.
Like any low-dropout regulator, the EUP7982 requires
external capacitors for regulator stability. The EUP7982
is specifically designed for portable applications
requiring minimum board space and smallest components.
These capacitors must be correctly selected for good
performance.
Input Capacitor
A minimum input capacitance of 1µF is required between
the EUP7982 input pin and ground (the amount of the
capacitance may be increased without limit).This
capacitor must be located a distance of not more than
1cm from the input pin and returned to a clean analog
ground.
Unlike many other LDO’s , addition of a noise reduction
capacitor does not effect the load transient response of
the device. However, it does affect start-up time. The
smaller the capacitance value, the quicker the start-up
time.
1µF ceramic capacitor are fine for most end use
applications. If a tantalum capacitor is used at the input,
it must be guaranteed by the manufacturer to have asurge
current rating sufficient for the application.
Power Dissipation and Junction Temperature
Specified regulator operation is assured to a junction
temperature of 125°C; the maximum junction
temperature should be restricted to 125°C under normal
operating conditions. This restriction limits the power
dissipation the regulator can handle in any given
application. To ensure the junction temperature is within
acceptable limits, calculate the maximum allowable
dissipation, PD(max), and the actual dissipation, PD, which
must be less than or equal to PD(max)
No-Load Stability
The EUP7982 will remain stable and in regulation with
no external load. This is specially important in CMOS
RAM keep-alive applications.
Output Capacitance
The maximum-power-dissipation limit is determined
using the following equation:
The EUP7982 is specifically designed to employ ceramic
output capacitors as low as 2.2µF. Ceramic capacitors
below 10µF offer significant cost and space savings,
along with high frequency noise filtering. Higher values
and other types and of capacitor may be used, but their
equivalent series resistance (ESR) should be maintained
below 0.5Ω. Ceramic capacitor of the value required by
the EUP7982 are available in the following dielectric
types: Z5U, Y5V, X5R, and X7R. The Z5U and Y5V
types exhibit a 50% or more drop in capacitance value as
their temperature increase from 25°C, an important
consideration. The X5R generally maintain their
capacitance value within ± 20%. The X7R type are
desirable for their tighter tolerance of 10% over
temperature.
T max − T
J
=
A
P
D(max)
R
θJA
Where:
TJmax is the maximum allowable junction temperature.
R
θJA is the thermal resistance junction-to-ambient for the
package
TA is the ambient temperature.
The regulator dissipation is calculated using:
PD=(VI-VO) × IO
Power dissipation resulting from quiescent current is
negligible. Excessive power dissipation triggers the
thermal protection circuit.
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EUP7982
Adjustable Operation
Fault Detection
The adjustable version of the EUP7982 has an output
voltage range of 1.25V to 6V. The output voltage of the
EUP7982 adjustable regulator is programmed using an
external resistor divider as shown in Figure3. The output
voltage is calculated using:
The EUP7982 provides a FAULT pin that goes low
during out of regulation conditions like current limit and
thermal shutdown, or when it approaches dropout. The
latter monitors the input-to-output voltage differential
and compares it against a threshold that is slightly above
the dropout voltage. This threshold also tracks the
dropout voltage as it varies with load current. Refer to
Fault Detect vs. Load Current curve in the typical
characteristics section.
The FAULT pin requires a pull-up resistor since it is an
open-drain output. This resistor should be large in value
to reduce energy drain. A100kΩ pull-up resistor works
well for most applications.
R
1
V = V ×(1+
)
O
ref
R
2
Where:
Vref=1.23V typ. (the internal reference voltage)
Utilize the following equation for adjusting the output to
a particular voltage:
V
O
Shutdown
P = R
−1
I
2
1.23V
The EUP7982 goes into sleep mode when the
pin
SHDN
is in a logic low condition. During this condition, the
pass transistor, error amplifier, and bandgap are turned
off, reducing the supply current to 60nA typical. The
Choose R2=100k to optimize accuracy, power supply
rejection, noise and power consumption.
In order to improve the stability of the adjustable version,
it is suggested that a small compensation capacitor C1 be
placed between OUT and SET
pin may be directly tied to VIN to keep the part
SHDN
on.
Fast Start-up
The EUP7982 provides fast start-up time for better
system efficiency. The start-up speed is maintained when
using the optional noise bypass capacitor.
Figure3. Adjustable LDO Regulator Programming
DS7982 Ver 1.4 May.2005
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EUP7982
Packaging Information
MSOP-8
NOTE
1. Package body sizes exclude mold flash and gate burrs
2. Dimension L is measured in gage plane
3. Tolerance 0.10mm unless otherwise specified
4. Controlling dimension is millimeter. Converted inch dimensions are not necessarily exact.
DIMENSIONS IN MILLIMETERS
DIMENSIONS IN INCHES
SYMBOLS
MIN.
0.81
0.05
0.76
0.28
0.13
2.90
4.70
2.90
------
0.40
------
0
NOM.
0.95
0.09
0.86
0.30
0.15
3.00
4.90
3.00
0.65
0.53
------
------
MAX.
1.10
0.15
0.97
0.38
0.23
3.10
5.10
3.10
-----
0.66
0.10
6
MIN.
0.032
0.002
0.030
0.011
0.005
0.114
0.185
0.114
------
0.016
------
0
NOM.
0.0375
0.004
0.034
0.012
0.006
0.118
0.193
0.118
0.026
0.021
------
MAX.
0.043
0.006
0.038
0.015
0.009
0.122
0.201
0.122
------
0.026
0.004
6
A
A1
A2
b
C
D
E
E1
e
L
y
θ
------
DS7982 Ver 1.4 May.2005
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