LP38859_15 Datasheet, PDF (5/25 Pages) Texas Instruments – 3A Fast-Response High-Accuracy LDO Linear Regulator With Soft Start

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LP38859
SNVS337F – JUNE 2006 – REVISED SEPTEMBER 2015
6.5 Electrical Characteristics
Unless otherwise specified: V_IN = V_OUT(NOM) + 1 V, V_BIAS = 3 V, I_OUT = 10 mA, C_IN = C_OUT = 10 µF, C_BIAS = 1 µF, C_SS = open.
Typical limits apply for T_J = 25°C; minimum and maximum limits apply over the junction temperature (T_J) range of -40°C to
+125°C, unless otherwise specified. Minimum and maximum limits are specified through test, design, or statistical correlation.
Typical values represent the most likely parametric norm at T_J = 25°C, and are provided for reference purposes only.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
V_OUT
ΔV_OUT/ΔV_IN
ΔV_OUT/ΔV_BIAS
ΔV_OUT/ΔI_OUT
V_DO
I_GND(IN)
I_GND(BIAS)
UVLO
UVLO_(HYS)
V_OUT accuracy
Line regulation, V_IN(1)
Line regulation, V_BIAS(1)
Output voltage load regulation⁽²⁾
Dropout voltage⁽³⁾
Quiescent current drawn from
V_IN supply
Quiescent current drawn from
V_BIAS supply
Undervoltage lockout threshold
Undervoltage lockout hysteresis
V_OUT(NOM) + 1 V ≤ V_IN ≤ V_BIAS
3 V ≤ V_BIAS ≤ 5.5 V
10 mA ≤ I_OUT ≤ 3 A, T_J = 25°C
V_OUT(NOM) + 1 V ≤ V_IN ≤ V_BIAS
3 V ≤ V_BIAS ≤ 5.5 V
10 mA ≤ I_OUT ≤ 3 A
V_OUT(NOM) + 1 V ≤ V_IN ≤ V_BIAS
3 V ≤ V_BIAS ≤ 5.5 V
10 mA ≤ I_OUT ≤ 3 A
0°C ≤ T_J ≤ +125°C
V_OUT(NOM) + 1 V ≤ V_IN ≤ V_BIAS
3 V ≤ V_BIAS ≤ 5.5 V
10 mA ≤ I_OUT ≤ 3 A
I_OUT = 3 A, T_J = 25°C
I_OUT = 3 A
LP38859-0.8
10 mA ≤ I_OUT ≤ 3 A, T_J = 25°C
LP38859-0.8
10 mA ≤ I_OUT ≤ 3 A
LP38859-1.2
10 mA ≤ I_OUT ≤ 3 A, T_J = 25°C
LP38859-1.2
10 mA ≤ I_OUT ≤ 3 A
10 mA ≤ I_OUT ≤ 3 A, T_J = 25°C
10 mA ≤ I_OUT ≤ 3 A
V_BIAS rising until device is functional
T_J = 25°C
V_BIAS rising until device is functional
V_BIAS falling from UVLO threshold
until device is non-functional
T_J = 25°C
V_BIAS falling from UVLO threshold
until device is non-functional
-1%
1%
–3%
3%
–2%
0.04
0.10
0.2
240
7
11
3
2.2
2.45
2
60
150
50
2%
%/V
%/V
%/A
300
mV
450
8.5
9
mA
12
15
3.8
mA
4.5
2.7
V
2.9
300
mV
350
I_SC
SOFT-START
Output short-circuit current
V_IN = V_OUT(NOM) + 1 V
V_BIAS = 3 V, V_OUT = 0 V
6.2
A
LP38859-0.8
r_SS
Soft-start internal resistance
LP38859-1.2
11
13.5
16
kΩ
13.5
16
18.5
t_SS
Soft-start time
t_SS = C_SS × r_SS × 5
LP38859-0.8, C_SS = 10 nF
LP38859-1.2, C_SS = 10 nF
675
μs
800
(1) Output voltage line regulation is defined as the change in output voltage from nominal value resulting from a change in input voltage.
(2) Output voltage load regulation is defined as the change in output voltage from nominal value as the load current increases from no load
to full load.
(3) Dropout voltage is defined the as input to output voltage differential (V_IN – V_OUT) where the input voltage is low enough to cause the
output voltage to drop no more than 2% from the nominal value.
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