PS37044AJOFDDFR datasheet(15/34 Pages) TI

15 / 34 page

8 Detailed Description

8.1 Overview

TPS3704x is a family of quad, triple, dual, and single precision voltage supervisors where each channel has

overvoltage and undervoltage detection capability. The TPS3704x features a highly accurate window threshold

voltage where the upper and lower thresholds can be customized for symmetric or asymmetric tolerances. The

reset signal for the TPS3704x is asserted, with a fault detection time delay (tPD = 10 μs maximum), when the

sense voltage is outside of the overvoltage and undervoltage thresholds.

TPS3704x includes the resistors used to set the overvoltage and undervoltage thresholds internal to the

device. These internal resistors allow for lower component counts and greatly simplifies the design because

no additional margins are needed to account for the accuracy of external resistors. The level of integration in the

TPS3704x enables a total small solution size for any application.

The TPS3704x is capable to monitor any voltage rail with high resolution (VIT ≤ 0.8 V: 20 mV steps /

VIT > 0.8 V: 0.5% or 20 mV steps whichever is lower). Each channel in the TPS3704x can be configured

independently as a window, OV or UV supervisor. Also, the VIT threshold voltage for each channel can be

asymmetric. For example, a channel that is configured as an overvoltage supervisor can be setup with a +5%

tolerance whereas an undervoltage channel supervisor can be programmed with a -4% tolerance. If a window

supervisor is configured, the voltage threshold tolerance can either be symmetrical or asymmetrical.

The TPS3704x includes fixed reset time delay (tD) options ranging from 20 μs to 1200 ms and can monitor up to

four channels while maintaining an ultra-low IQ current of 15 μA (maximum).

8.2 Functional Block Diagram

VDD

BANDGAP

–

VBG

UNDERVOLTAGE

OVERVOLTAGE

SENSE1

POR

OTP

OSCILLATOR

CLK

TIME DELAY

(counter)

OTPUV_EN

OTPOV_EN

UVLO

–

VREF_UV

VREF_OV

VDD

UVLO

VBG

SENSE1

GND

VREF_UVLO

RESET1

VBG

SENSE1

Figure 8-1. TPS37041 Single-Channel Functional Block Diagram

www.ti.com

TPS3704

SNVSBZ2B – MARCH 2021 – REVISED DECEMBER 2021

Submit Document Feedback

Product Folder Links: TPS3704

PS37044AJOFDDFR bảng dữ liệu(PDF) 15 Page - Texas Instruments

PS37044AJOFDDFR bảng dữ liệu(HTML) 15 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

bảng dữ liệu tải về

Link URL