Specifications

DIAG_EN low and

IN high to low and

t > t

off,deg

DIAG_EN

high to low

DIAG_EN

low to high

IN low to high

IN high to low and

DIAG_EN high and

t > t

off,deg

IN low to high

Standby Mode

(IN low, DIAG low)

Standby mode

with diagnostic

(IN low, DIAG high)

Normal Mode

(IN high)

TPS1H100-Q1

www.ti.com

SLVSCM2A –OCTOBER 2014–REVISED JANUARY 2014

In addition, during the output off period, diagnostic disable function lowers the current consumption for the

standby condition. The three working modes in the device are normal mode, standby mode, and standby mode

with diagnostic. If an off-state power saving is required in the system, the standby current is <500 nA with

DIAG_EN low. If the off-state diagnostic is required in the system, the typical standby current is around 1 mA

with DIAG_EN high.

8.4 Device Functional Modes

8.4.1 Working Mode

The three working modes in the device are normal mode, standby mode, and standby mode with diagnostic. If an

off-state power saving is required in the system, the standby current is less than 500 nA with DIAG_EN low. If an

off-state diagnostic is required in the system, the typical standby current is around 1 mA with DIAG_EN high.

Note that to enter standby mode requires IN low and t > t

off,deg

. t

off,deg

is the standby mode deglitch time, which is

used to avoid false triggering. Figure 44 shows a work mode state machine block diagram.

Figure 44. Work Mode State Machine

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