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

RESET

VDD

GND

TPS3850

SENSE

1.8V

Microcontroller

SET1

1.2V

CRST

GND

WDO

NMI

CWD

SET0

WDI

GPIO

Copyright © 2016, Texas Instruments Incorporated

RESET

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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

SBVS301 – OCTOBER 2016

TPS3850 Precision Voltage Supervisor with Programmable Window Watchdog Timer

1

1 Features

1

•

0.8% Voltage Threshold Accuracy

•

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

•

Factory-Programmed Precision Watchdog and

Reset Timers:

–

±15% Accurate WDT and RST Delays

•

Watchdog Disable Feature

•

User-Programmable Watchdog Timeout

•

User-Programmable Reset Delay

•

Input Voltage Range: VDD = 1.6 V to 6.5 V

•

•

Open-Drain Outputs

•

Available in a Small 3-mm × 3-mm, 10-Pin VSON

Package

•

Junction Operating Temperature Range:

–40°C to +125°C

2 Applications

•

Safety Critical Applications

•

Telematics Control Units

•

FPGA and ASIC Applications

•

Embedded Controllers

•

Microcontroller and DSP Applications

•

Video Surveillance

3 Description

The

TPS3850

combines

a

precision

voltage

supervisor with a programmable window watchdog

timer. The TPS3850 window comparator achieves

0.8%

accuracy

(–40°C

to

+125°C)

for

both

overvoltage

thresholds. The TPS3850 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 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 is available in a small 3.00-mm ×

3.00-mm, 10-pin VSON package.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPS3850

VSON (10)

3.00 mm × 3.00 mm

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

the end of the data sheet.

Fully Integrated Microcontroller Supervisory

Circuit

Temperature