Datasheet

TPS54427
SLVSB43A –NOVEMBER 2011–REVISED JUNE 2013 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
over operating free-air temperature range, V
IN
= 12 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
THERMAL SHUTDOWN
Shutdown temperature
(2)
170
T
SDN
Thermal shutdown threshold °C
Hysteresis
(2)
35
ON-TIME TIMER CONTROL
t
ON
On time V
IN
= 12 V, V
O
= 1.05 V 150 ns
t
OFF(MIN)
Minimum off time T
A
= 25°C, V
FB
= 0.7 V 260 310 ns
SOFT START
I
SSC
SS charge current V
SS
= 1 V 4.2 6.0 7.8 μA
I
SSD
SS discharge current V
SS
= 0.5 V 0.1 0.2 mA
UVLO
Wake up V
REG5
voltage 3.45 3.75 4.05
UVLO UVLO threshold V
Hysteresis V
REG5
voltage 0.19 0.32 0.45
(2) Not production tested.
4 Submit Documentation Feedback Copyright © 2011–2013, Texas Instruments Incorporated
Product Folder Links :TPS54427