TPS1H100-Q1
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ZHCSDD8D –OCTOBER 2014–REVISED DECEMBER 2019
7.3.4.8 Loss of Power Supply Protection
When loss of supply occurs, output is turned off regardless of whether the input is high or low. For a resistive or
capacitive load, loss-o-supply protection is easy to achieve due to no more power. The worst case is a charged
inductive load. In this case, the current is driven from all of the IOs to maintain the inductance output loop. TI
recommends either the MCU serial resistor plus the GND network (diode and resistor in parallel) or external free-
wheeling circuitry.
VBAT
IN
DRAIN
5V
ST
DIAG_EN
CS
SOURCE
MCU
D
L
NC
(Floating)
CL
Z
GND
Rgnd
Dgnd
Figure 40. Loss of Battery
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