RESET

VDD

GND

TPS3851-Q1

1.8 V

Microcontroller

SET1

RESET

GND

WDO

NMI

CWD

MR

WDI

GPIO

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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.

TPS3851-Q1

SBVS286 – MARCH 2017

TPS3851-Q1 High-Accuracy Voltage Supervisor with Integrated Watchdog Timer

1

1 Features

1

•

AEC-Q100 Qualified with the Following Results:

–

Device Temperature Grade 1: –40°C to 125°C

Ambient Operating Temperature Range

–

Device HBM ESD Classification Level 2

–

Device CDM ESD Classification Level C4B

•

•

1% Voltage Threshold Accuracy

•

•

User-Programmable Watchdog Timeout

•

Factory Programmed Precision Watchdog and

Reset Timers:

–

±15% Accurate WDT and RST Delays

•

Open-Drain Outputs

•

Precision Undervoltage Monitoring:

–

Supports Common Rails from 1.8 V to 5.0 V

–

4% and 7% Undervoltage Thresholds

Available

–

0.5% Hysteresis

•

Watchdog Disable Feature

•

Available in a Small 3-mm × 3-mm, 8-Pin VSON

Package

2 Applications

•

Safety Critical Applications

•

Automotive Vision Systems

•

Automotive ADAS Systems

•

Telematics Control Units

•

FPGAs and ASICs

•

Microcontrollers and DSPs

3 Description

The

TPS3851-Q1

device

combines

a

precision

voltage supervisor with a programmable watchdog

timer. The TPS3851-Q1 comparator achieves a 0.8%

accuracy (–40°C to +125°C) for the undervoltage

accurate hysteresis on the undervoltage threshold

making the device ideal for use with tight tolerance

systems. The supervisor RESET delay features a

15% accuracy, high-precision delay timing.

The

TPS3851-Q1

includes

a

programmable

watchdog timer for a wide variety of applications. The

dedicated watchdog output (WDO) enables increased

resolution to help determine the nature of fault

conditions.

The

watchdog

timeouts

can

be

programmed either by an external capacitor, or by

factory-programmed

default

delay

settings.

The

watchdog can be disabled via logic pins to avoid

undesired watchdog timeouts during the development

process.

The TPS3851-Q1 is available in a small 3.00-mm ×

3.00-mm, 8-pin VSON package. The TPS3851-Q1

features wettable flanks that allow for easy optical

inspection.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPS3851-Q1

VSON (8)

3.00 mm × 3.00 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Typical Application Circuit