Temperature (qC)

-50

-25

0

25

50

75

100

125

-0.5

-0.3

-0.1

0.1

0.3

0.5

Unit 1

Unit 2

Unit 3

Unit 4

Unit 5

Average

VDD

GND

TPS3850-Q1

SENSE

1.8V

Microcontroller

SET1

1.2V

VCORE

VI/O

CRST

GND

CWD

SET0

WDI

GPIO

Copyright © 2016, Texas Instruments Incorporated

RESET

NMI

RESET

WDO

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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.

TPS3850-Q1

SBVS264 – JANUARY 2017

TPS3850-Q1 Precision Voltage Supervisor with Programmable Window 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

•

•

0.8% Voltage Threshold Accuracy (Max)

•

•

User-Programmable Watchdog Timeout

•

User-Programmable Reset Delay

•

Factory Programmed Precision Watchdog and

Reset Timers:

–

±15% Accurate WDT and RST Delays

•

Open-Drain Outputs

•

Precision Over- and Undervoltage Monitoring:

–

Supports Common Rails from 0.9 V to 5.0 V

–

4% and 7% Fault Windows Available

–

0.5% Hysteresis

•

Watchdog Disable Feature

•

Available in a Small 3-mm × 3-mm, 10-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 TPS3850-Q1 combines a precision voltage

supervisor with a programmable window watchdog

timer. The TPS3850-Q1 window comparator achieves

0.8%

accuracy

(–40°C

to

+125°C)

for

both

overvoltage

thresholds. The TPS3850-Q1 also includes accurate

hysteresis on both thresholds, making the device

ideal for use with tight tolerance systems. The

supervisor RESET delay can be set by factory-

programmed default delay settings, or programmed

by an external capacitor. The factory-programmed

RESET

delay

features

a

15%

accuracy,

high-

precision delay timing.

The TPS3850-Q1 includes a programmable window

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 window watchdog timeouts can be

set by factory-programmed default delay settings, or

programmed by an external capacitor. The watchdog

can be disabled via logic pins to avoid undesired

watchdog timeouts during the development process.

The TPS3850-Q1 is available in a small 3.00-mm ×

3.00-mm, 10-pin VSON package. The TPS3850-Q1

features wettable flanks for easy optical inspection.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPS3850-Q1

VSON (10)

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

Temperature