LP38859 Datasheet, PDF (3/14 Pages) National Semiconductor (TI) – 3A Fast-Response High-Accuracy LDO Linear Regulator with Soft-Start

Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
V_OUT Voltage (Survival)
I_OUT Current (Survival)
Junction Temperature
−0.3V to +6.0V
Internally Limited
−40˚C to +150˚C
Storage Temperature Range
Lead Temperature
Soldering, 5 seconds
ESD Rating
Human Body Model (Note 2)
Power Dissipation (Note 3)
V_IN Supply Voltage (Survival)
V_BIAS Supply Voltage (Survival)
V_SS SoftStart Voltage (Survival)
−65˚C to +150˚C
260˚C
±2 kV
Internally Limited
−0.3V to +6.0V
−0.3V to +6.0V
−0.3V to +6.0V
Operating Ratings(Note 1)
V_IN Supply Voltage
V_BIAS Supply Voltage
I_OUT
Junction Temperature
Range(Note 3)
(V_OUT + V_DO) to V_BIAS
3.0V to 5.5V
0 mA to 3.0A
−40˚C to +125˚C
Electrical Characteristics Unless otherwise specified: V_IN = V_OUT(NOM) + 1V, V_BIAS = 3.0V, I_OUT = 10 mA,
C_IN = C_OUT = 10 µF, C_BIAS = 1 µF, C_SS = open. Limits in standard type are for T_J = 25˚C only; limits in boldface type apply
over the junction temperature (T_J) range of -40˚C to +125˚C. Minimum and Maximum limits are guaranteed through test, de-
sign, or statistical correlation. Typical values represent the most likely parametric norm at T_J = 25˚C, and are provided for ref-
erence purposes only.
Symbol
Parameter
V_OUT
V_OUT Accuracy
∆V_OUT/∆V_IN
Line Regulation, V_IN
(Note 4)
∆V_OUT/∆V_BIAS
Line Regulation, V_BIAS
(Note 4)
Output Voltage Load Regulation
∆V_OUT/∆I_{OUT (Note 5)}
Conditions
V_OUT(NOM) + 1V ≤ V_IN ≤ V_BIAS,
3.0V ≤ V_BIAS ≤ 5.5V,
10 mA ≤ I_OUT ≤ 3A
V_OUT(NOM) + 1V ≤ V_IN ≤ V_BIAS,
3.0V ≤ V_BIAS ≤ 5.5V,
10 mA ≤ I_OUT ≤ 3.0A,
0˚C ≤ T_J ≤ +125˚C
V_OUT(NOM) + 1V ≤ V_IN ≤ V_BIAS
3.0V ≤ V_BIAS ≤ 5.5V
10 mA ≤ I_OUT ≤ 3.0A
V_DO
Dropout Voltage (Note 6)
I_GND(IN)
Quiescent Current Drawn from
V_IN Supply
I_GND(BIAS)
UVLO
Quiescent Current Drawn from
V_BIAS Supply
Under-Voltage Lock-Out
Threshold
Under-Voltage Lock-Out
UVLO_{(HYS) Hysteresis}
I_SC
Soft-Start
r_SS
t_SS
Output Short-Circuit Current
Soft-Start internal resistance
Soft-Start time
t_SS = C_SS x r_SS x 5
I_OUT = 3.0A
LP38859-0.8
10 mA ≤ I_OUT ≤ 3.0A
LP38859-1.2
10 mA ≤ I_OUT ≤ 3.0A
10 mA ≤ I_OUT ≤ 3.0A
V_BIAS rising until device is
functional
V_BIAS falling from UVLO
threshold until device is
non-functional
V_IN = V_OUT(NOM) + 1V,
V_BIAS = 3.0V, V_OUT = 0.0V
LP38859-0.8
LP38859-1.2
LP38859-0.8, C_SS = 10 nF
LP38859-1.2, C_SS = 10 nF
MIN
-1.0
-3.0
-2.0
-
-
-
-
-
-
2.20
2.00
60
50
-
11.0
13.5
-
-
TYP
0.0
0.0
0.04
0.10
0.2
240
7.0
11
3.0
2.45
150
6.2
13.5
16.0
675
800
MAX
1.0
3.0
2.0
Units
%
-
%/V
-
%/V
-
%/A
300
mV
450
8.5
9.0
mA
12
15
3.8
mA
4.5
2.70
V
2.90
300
mV
350
-
A
16.0
kΩ
18.5
-
µs
-
3
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