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LP2957ISX/NOPB 数据表(PDF) 3 Page - Texas Instruments

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部件名 LP2957ISX/NOPB
功能描述  5V Low-Dropout Regulator for 關P Applications
PDF  24 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

LP2957ISX/NOPB 数据表(HTML) 3 Page - Texas Instruments

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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.
LP2957AI
LP2957I
Symbol
Parameter
Conditions
Typical
Units
Min
Max
Min
Max
IGND
IL = 1 mA
150
200
200
µA
230
230
IL = 50 mA
1.1
2
2
2.5
2.5
Ground Pin Current(5)
IL = 100 mA
3
6
6
mA
8
8
IL = 250 mA
16
28
28
33
33
IGND
IL = 0
130
180
180
µA
Ground Pin Current in
Shutdown(5)
VSD = 0.4V
200
200
IGND
VIN = 4.5V
180
230
230
µA
Ground Pin Current at
Dropout(5)
IL = 0.1 mA
250
250
IO (Sink)
VIN = 5.3V
50
30
30
Off-State Output Pulldown
mA
Current
VO = 5V, VSD = 0.4V
20
20
IO (Off)
I(SD IN) ≥ 1 µA
3
10
10
Output Leakage in
µA
Shutdown
VIN = 30V, VOUT = 0V
20
20
ILIMIT
RL = 1Ω
400
500
500
Current Limit
mA
530
530
See(6)
Thermal Regulation
0.05
0.2
0.2
%/W
en
Output Noise Voltage
CL = 2.2 µF
500
(10 Hz to 100 kHz)
µV RMS
CL = 33 µF
320
IL = 100 mA
SHUTDOWN INPUT
VSD (ON)
1.155
1.305
1.155
1.305
Output Turn-On Threshold
V
Voltage
1.140
1.320
1.140
1.320
HYST
Hysteresis
6
mV
IB
VIN(SD) = 0V to 5V
10
−30
30
−30
30
Input Bias Current
nA
−50
50
−50
50
DROPOUT DETECTION COMPARATOR
IOH
VOH = 30V
0.01
1
1
Output “HIGH” Leakage
µA
2
2
VOL
VIN = 4V
150
250
250
Output “LOW” Voltage
mV
IO(COMP) = 400 µA
400
400
VTHR (Max)
See(7)
−240
−320
−150
−320
−150
Upper Threshold Voltage
mV
−380
−100
−380
−100
VTHR (Min)
See(7)
−350
−450
−230
−450
−230
Lower Threshold Voltage
mV
−640
−160
−640
−160
HYST
Hysteresis
See(7)
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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Product Folder Links: LP2957 LP2957A



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