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LP2957_15 Datasheet, PDF (3/24 Pages) Texas Instruments – 5V Low-Dropout Regulator for μP Applications
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LP2957, LP2957A
www.ti.com
SNVS102C – JUNE 1998 – REVISED APRIL 2013
Electrical Characteristics (continued)
Limits in standard typeface are for TJ = 25°C, and limits in boldface type apply over the full operating temperature range.
Unless otherwise specified: VIN = 6V, IL = 1 mA, CL = 2.2 µF, VSD = 3V.
Symbol
Parameter
Conditions
Typical
LP2957AI
Min
Max
LP2957I
Min
Max
Units
IGND
IL = 1 mA
150
200
200
µA
230
230
Ground Pin Current(5)
IL = 50 mA
IL = 100 mA
1.1
2
2
2.5
2.5
3
6
6
mA
8
8
IL = 250 mA
16
28
28
33
33
IGND
IGND
IO (Sink)
IO (Off)
ILIMIT
Ground Pin Current in
Shutdown (5)
Ground Pin Current at
Dropout (5)
Off-State Output Pulldown
Current
Output Leakage in
Shutdown
Current Limit
IL = 0
VSD = 0.4V
VIN = 4.5V
IL = 0.1 mA
VIN = 5.3V
VO = 5V, VSD = 0.4V
I(SD IN) ≥ 1 µA
VIN = 30V, VOUT = 0V
RL = 1Ω
Thermal Regulation
See (6)
130
180
180
µA
200
200
180
230
230
µA
250
250
50
30
20
30
mA
20
3
10
10
µA
20
20
400
500
500
mA
530
530
0.05
0.2
0.2
%/W
en
Output Noise Voltage
(10 Hz to 100 kHz)
IL = 100 mA
SHUTDOWN INPUT
VSD (ON)
Output Turn-On Threshold
Voltage
CL = 2.2 µF
CL = 33 µF
HYST
IB
Hysteresis
Input Bias Current
VIN(SD) = 0V to 5V
DROPOUT DETECTION COMPARATOR
IOH
Output “HIGH” Leakage
VOH = 30V
VOL
VTHR (Max)
VTHR (Min)
HYST
Output “LOW” Voltage
Upper Threshold Voltage
Lower Threshold Voltage
Hysteresis
VIN = 4V
IO(COMP) = 400 µA
See (7)
See (7)
See (7)
500
µV RMS
320
1.155 1.305 1.155 1.305
V
1.140 1.320 1.140 1.320
6
mV
10
−30
30
−30
30
nA
−50
50
−50
50
0.01
1
2
1
µA
2
150
250
250
mV
400
400
−240
−320
−150
−320
−150
mV
−380
−100
−380
−100
−350
−450
−230
−450
−230
mV
−640
−160
−640
−160
60
mV
(5) Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the load current plus the
ground pin current.
(6) Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load
or line regulation effects. Specifications are for a 200 mA load pulse at VIN = 20V (3W pulse) for T = 10 ms.
(7) Voltages are referenced to the nominal regulated output voltage.
Copyright © 1998–2013, Texas Instruments Incorporated
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