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1 Features

? AEC-Q100 qualified with the following results:

– Device temperature grade 1: –40°C to 125°C

ambient operating temperature range

? Input voltage range: VDD = 1.04 V to 6.0 V

? Ultra low supply current: IDD = 250 nA (typical)

? Factory programmed or user-programmable

watchdog timeout

– ±10 Accurate timer (maximum)

– Factory programmed close window: 1msec to

100sec

? Factory programmed or user-programmable reset

delay

– ±10 Accurate timer (maximum)

– Factory programmed option: 2 msec to 10 sec

? Open-drain, push-pull; active-low outputs

? Various programmability options:

– Watchdog enable-disable

– Watchdog startup delay: no delay to 10 sec

– Open window to close window ratio option: 1X

to 511X

– Latched output option

? MR functionality support

2 Applications

? On-board (OBC) and wireless charger

? Driver monitoring

? Battery Management System (BMS)

? Front camera

? Surround view system ECU

3 Description

The TPS3436-Q1 is an ultra-low power consumption

(250 nA typical) device offering a programmable

window watchdog timer.

The TPS3436-Q1 offers a high accuracy window

watchdog timer with host of features for a wide variety

of applications. The close window timer can be factory

programmed or user programmed using an external

capacitor. The open window to close window ratio

can be changed on-the-fly using a combination of

logic pins. The watchdog feature can be enabled

or disabled using a dedicated pin or combination

of ratio pins. The device also offers start-up delay

options to disable watchdog monitoring for fixed time

immediately after host power up.

The WDO delay can be set by factory-programmed

default delay settings or programmed by an external

capacitor. The device also offers a latched output

operation where the output is latched until the

watchdog fault is cleared.

The TPS3436-Q1 is available in a small 8-pin SOT23

package.