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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

? Fixed threshold voltage (VIT-): 1.05 V to 5.4 V

– Threshold voltage available in 50 mV steps

– 1.2 Voltage threshold accuracy (maximum)

– Built-in hysteresis (VHYS): 5 (Typical)

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

? Factory programmed or user-programmable

watchdog timeout

– ±10 Accurate timer (maximum)

– Factory programmed: 1 msec to 100 sec

? 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

– On the fly timer extension: 1X to 256X

– 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 TPS35-Q1 is an ultra-low power consumption

(250 nA typical) device offering a precision voltage

supervisor with a programmable watchdog timer.

The TPS35-Q1 supports wide threshold levels for

undervoltage supervision with 1.2 accuracy across

the specified temperature range.

The TPS35-Q1 offers a high accuracy watchdog

timer with a host of features for a wide variety

of applications. The watchdog timer can be factory

programmed or user programmed using an external

capacitor. The timer value can be changed on-thefly

using a combination of logic pins. The watchdog

feature can be enabled or disabled using a dedicated

pin or combination of timer extension pins. The device

also offers start-up delay options to disable watchdog

monitoring for fixed time immediately after host power

up or a RESET event. The TPS35-Q1 offers a pinout

option with an independent WDO pin. This helps

determine the nature of the fault condition.

The RESET or WDO delay can be set by factoryprogrammed

default delay settings or programmed by

an external capacitor. The device also offers a latched

output operation where the output is latched until the

supervisor or watchdog fault is cleared.

The TPS35-Q1 is available in a small 8-pin SOT23

package.