TPS3779DDBVR datasheet(10/28 Pages) TI1

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SENSE1

GND

VDD

OUT1

VIT+

SENSE2

OUT2

TPS3779

SENSE1

GND

VDD

OUT1

VIT+

SENSE2

OUT2

TPS3780

TPS3779, TPS3780

SBVS250 – APRIL 2015

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8 Detailed Description

8.1 Overview

The TPS3779 and TPS3780 are a family of small, low quiescent current (IDD), dual-channel voltage detectors.

These devices have high-accuracy, rising and falling input thresholds, and assert the output as shown in Table 1.

The output (OUTx pin) goes low when the SENSEx pin is less than VIT– and goes high when the pin is greater

than VIT+. The TPS3779 and TPS3780 offer multiple hysteresis options from 0.5% to 10% for use in a wide

variety of applications. These devices have two independent voltage detection channels that can be used in

systems where multiple voltage rails are required to be monitored, or where one channel can be used as an early

warning signal and the other channel used as the system reset signal.

Table 1. TPS3779, TPS3780 Truth Table

CONDITIONS

OUTPUT

SENSE1 < VIT–

OUT1 = low

SENSE2 < VIT–

OUT2 = low

SENSE1 > VIT+

OUT1 = high

SENSE2 > VIT+

OUT2 = high

8.2 Functional Block Diagrams

Figure 20. TPS3779 Block Diagram

Figure 21. TPS3780 Block Diagram

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