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| LP38869_15 Datasheet, PDF (4/23 Pages) Texas Instruments – 1A FlexCap, Low-Dropout Linear Regulator with 0.75% Accuracy | |||
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LP38869
SNVS877B â AUGUST 2012 â REVISED APRIL 2013
www.ti.com
Electrical Characteristics (continued)
Unless otherwise specified: VIN = VOUT(NOM) + 500 mV, VSHDN = VIN, IOUT = 10 mA, CIN = 1 μF MLCC, COUT = 1 μF MLCC, SS =
Open. Limits in standard type are for TJ = 25°C only; limits in boldface type apply over the junction temperature (TJ) range of
-40°C to +125°C. Minimum and Maximum limits are specified through test, design, or statistical correlation. Typical values
represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only.
Symbol
Parameter
Conditions
Min
Typ
Max Units
IGND
IOFF
IOUT(MAX)
ISC
ILIM
VSET(TH)
Ground Pin Current
Shutdown Supply Current
Adjustable Output Voltage Range
Maximum Output Current
Short Circuit Current
In Regulation Current Limit
SET Dual Mode Threshold
IOUT = 100 µA
IOUT = 1A
VSHDN = 0.0V, VIN = +5.5V, VOUT = 0V
1 mA ⤠IOUT ⤠1 A
Continuous
VOUT = 0V
VSET = 0.760V, -40°C ⤠TJ ⤠85°C
VSET = 0.760V
Threshold is where SET pin voltage rising
from 0.0V deactivates the Pre-Set Mode
-
0.6
2
mA
-
0.7
-
-
2
20
µA
0.8
-
5
V
1.0
-
-
A
1.0
1.9
-
A
2.0
3
1.9
-
A
35
87
138 mV
ISET
SET Pin Bias Current
VDO
Dropout Voltage (3)
VSHDN(ON)
VSHDN(OFF)
ÎVSHDN
ISHDN
ISS
SHDN ON Threshold
SHDN OFF Threshold
VSHDN Hysteresis
SHDN Input Bias Current
Soft-Start Charge Current
RST Output Low Voltage
Operating Input Voltage (VIN)
Range for RST Valid
VSET = +0.900V
IOUT = 1 mA
IOUT = 1.0A
VSHDN rising until output is acitve
+2.7V ⤠VIN ⤠+5.5V
VSHDN falling until output is shutdown
+2.7V ⤠VIN ⤠+5.5V
+2.7V ⤠VIN ⤠+5.5V
VSHDN = 0V
VSHDN = 5.5V
VSS= 0.0V
IRST(SINK) = 1 mA
IRST(SINK) = 10 μA
-
2
300
nA
-
0.2
-
mV
-
185
330
1.60 0.86
-
V
-
0.78 0.58
-
80
-
mV
-
0.002 0.1
µA
-
0.002 0.1
-
6.7
-
µA
-
0.007 0.1
V
1.0
-
5.5
V
IRST
VRST(TH)
RST Leakage
RST Threshold
VIN = 5.5V, VRST = 5.5V
VOUT falling from VOUT(NOM) until RST pin
goes low
-
0.0
1
µA
86
92
97
%
OUT
ÎVRST
RST Hysteresis
VOUT rising from VRST(TH) until RST pin goes
high
-
10
-
mV
tRST(DELAY) RST Release Delay time
Time from when VOUT returns to normal to
when VRST goes high
1.0
3
5.5
ms
AC Parameters
PSRR
VNOISE
Ripple Rejection
Output Noise
F = 100 kHz, COUT = 1 µF Ceramic,
IOUT = 300 mA
-
54
-
dB
f = 10Hz to 100 kHz, COUT = 1µF Ceramic,
IOUT = 150 mA
-
50
-
µVRMS
Thermal Characteristics
TSD
ÎTSD
Thermal Shutdown
Thermal Shutdown Hysteresis
TJ rising
TJ falling from TSD
-
160
-
°C
-
15
-
(3) Dropout voltage (VDO) is defined as the minimum input to output differential voltage at which the output voltage drops to 100 mV below
the nominal value. For any output voltage less than 2.5V, the minimum VIN operating voltage of 2.7V is the limiting factor, and dropout
voltage is not a valid parameter.
4
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