TPS35-Q1 Automotive Nano IQ Precision Voltage Supervisor with Precision Timeout

Watchdog Timer

1 Features

• AEC-Q100 qualified with the following results:

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

ambient operating temperature range

• Factory programmed or user-programmable

watchdog timeout

– ±10% Accurate timer (maximum)

– Factory programmed: 1ms to 100s

• Factory programmed or user-programmable reset

delay

– ±10% Accurate timer (maximum)

– Factory programmed option: 2ms to 10s

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

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

– Threshold voltage available in 50mV steps

– 1.2% Voltage threshold accuracy (maximum)

– Built-in hysteresis (VHYS): 5% (typical)

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

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

• Various programmability options:

– Watchdog enable-disable

– Watchdog startup delay: no delay to 10s

– 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

(250nA typical) device offering a precision voltage

supervisor with a programmable timeout 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 timeout

watchdog timer with a host of features for a wide

variety of applications. The timeout watchdog timer

can be factory programmed or user programmed

using an external capacitor. The timer value can be

changed on-the-fly using a combination of logic pins.

The watchdog also offers unique features such as

enable-disable, start-up delay, independent WDO pin

option.

The RESET or 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

supervisor or watchdog fault is cleared.

The TPS35-Q1 provides a performance upgrade

alternative to TPS3851-Q1 device family. The TPS35-

Q1 is available in a small 8-pin SOT-23 package.

Device Information

PART NUMBER

PACKAGE (1)

BODY SIZE (NOM)

(2)

TPS35-Q1

DDF (8)

2.90mm × 1.60mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

(2)

The package size (length × width) is a nominal value and

includes pins, where applicable.

TPS35-Q1

µC

RESET

RESET

WDO

NMI

GPIO

WDI

WD-EN

GPIO

SET[0:1]

GPIO

GND

GND

VDD

VDD

CWD

CRST

MR

GND

TPS35-Q1 offers various pinout options to support different features.

Choose suitable pinout based on application needs

Supply

Typical Application Circuit

Ambient Te mperature (

C)

-40

-7

26

59

92

125

-10

-5

0

5

10

Device lot 1

Device lot 2

Device lot 3

TPS35-Q1

SLVSGE8B – NOVEMBER 2022 – REVISED AUGUST 2024

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.