LP38853_15 Datasheet, PDF (6/30 Pages) Texas Instruments – LP38853 3A Fast-Response High-Accuracy Adjustable LDO Linear Regulator with Enable and Soft-Start

LP38853
SNVS335E – DECEMBER 2006 – REVISED NOVEMBER 2015
www.ti.com
Electrical Characteristics (continued)
Unless otherwise specified: V_OUT = 0.8 V, V_IN = V_OUT(NOM) + 1 V, V_BIAS = 3 V, V_EN = V_BIAS, I_OUT = 10 mA, C_IN = C_OUT = 10 µF,
C_BIAS = 1 µF, C_SS = open; typical (TYP) limits are for T_J = 25°C only, and minimum (MIN) and maximum (MAX) limits apply
over the junction temperature (T_J) 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 T_J = 25°C, and are provided for
reference purposes only.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
UVLO
Undervoltage lockout
threshold
UVLO_(HYS)
Undervoltage lockout
hysteresis
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
2.2
2.45
2
60
150
50
2.7
V
2.9
300
mV
350
I_SC
Output short-circuit current
V_IN = V_OUT(NOM) + 1 V, V_BIAS = 3 V, V_OUT =
0V
5.8
A
SOFT-START
r_SS
t_SS
ENABLE
Soft-start internal resistance
Soft-start time
t_SS = C_SS × r_SS × 5
C_SS = 10 nF
11
13.5
675
16 kΩ
μs
I_EN
ENABLE pin current
V_EN(ON)
Enable voltage threshold
V_EN(HYS)
Enable voltage hysteresis
AC PARAMETERS
V_EN = V_BIAS
V_EN = 0 V, V_BIAS = 5.5 V, T_J = 25°C
V_EN = 0 V, V_BIAS = 5.5 V
V_EN rising until output = ON, T_J = 25°C
V_EN rising until output = ON
V_EN falling from V_EN(ON) until Output = OFF
T_J = 25°C
V_EN falling from V_EN(ON) until Output = OFF
0.01
–19
–30
–13
1
1.25
0.9
50
100
30
–40 μA
–51
1.5
V
1.55
150
mV
200
PSRR
(V_IN)
PSRR
(V_BIAS)
Ripple rejection for V_IN input
voltage
Ripple rejection for V_BIAS
voltage
V_IN = V_OUT(NOM) + 1 V,
ƒ = 120 Hz
V_IN = V_OUT(NOM) + 1 V,
ƒ = 1 kHz
V_BIAS = V_OUT(NOM) + 3 V,
ƒ= 120 Hz
V_BIAS = V_OUT(NOM) + 3 V,
ƒ = 1 kHz
80
70
dB
58
58
Output noise density
ƒ = 120 Hz
1
µV/√Hz
e_n
Output noise voltage
BW = 10 Hz − 100 kHz
BW = 300 Hz − 300 kHz
150
90
µV_RMS
THERMAL PARAMETERS
T_SD
T_SD(HYS)
Thermal shutdown junction
temperature
Thermal shutdown hysteresis
160
°C
10
6.6 Timing Requirements
t_OFF
Turnoff delay time, R_LOAD x C_OUT << t_OFF
t_ON
Turnon delay time, R_LOAD x C_OUT << t_ON
MIN
NOM
MAX UNIT
20
µs
15
µs
6
Submit Documentation Feedback
Product Folder Links: LP38853
Copyright © 2006–2015, Texas Instruments Incorporated