Hysteresis

Control

Positive

Tempco

Reference

HYST

SET

Negative

Tempco

Reference

TMP708

R

SET

R

PULLUP

2.7 V to 5.5 V

OT

VCC

GND

Copyright © 2016, Texas Instruments Incorporated

7

TMP708-Q1

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SBOS828 – DECEMBER 2016

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Copyright © 2016, Texas Instruments Incorporated

7 Detailed Description

7.1 Overview

The TMP708-Q1 is a fully-integrated, resistor-programmable temperature switch that incorporates two

temperature-dependent voltage references and one comparator. One voltage reference exhibits a positive

temperature coefficient (tempco), and the other voltage reference exhibits a negative tempco. The temperature at

which both voltage references are equal determines the temperature trip point.

The Functional Block Diagram shows the comparator, the NFET open-drain device connected to the OT pin, the

7.2 Functional Block Diagram