9 Application and Implementation

Note

Information in the following applications sections is not part of the TI component specification,

and TI does not warrant its accuracy or completeness. TI’s customers are responsible for

determining suitability of components for their purposes, as well as validating and testing their design

implementation to confirm system functionality.

9.1 Application Information

The following sections describe in detail how to properly use this device, depending on the requirements of the

final application.

9.2 Typical Application

Design 1: Adjustable Voltage Supervisor with Push-Button Functionality

A typical application for the TLV841S is voltage rail monitoring with push-button functionality. In this design

application, the TLV841SADL01 is being used to monitor a 3.3 V power rail and will trigger a reset when the

voltage drops below 2.90 V or when the push-button is pressed. The reset output connects to an MCU for

system resetting or servicing the push-button.

TLV841SADL01

VDD

GND

RESET

SENSE

Push-button

input

3.3V

47.5 k

10k

R1

R2

0.1 µF

30.1 k

0.1µF

Figure 9-1. Design 1 - Adjustable Voltage Supervisor with Push-Button Functionality Circuit

9.2.1 Design Requirements

The design requirements, described in Table 9-1, for this design has a defined reset threshold voltage of 2.90 V,

a reset delay of 40 μs and an output current no larger than 150 µA.

Table 9-1. Design Requirements

PARAMETER

DESIGN REQUIREMENTS

DESIGN RESULTS

Reset Asserting

Reset needs to assert when under the reset

condition of a button press or VDD ≤ 2.90 V.

Reset asserted when under the reset condition of a

button pressed or VDD ≤ 2.90 V.

Reset Asserting Timing

Reset output needs to assert when the reset

conditions are met for 20 μs, and needs to de-assert

after 40 μs of no reset conditions.

Reset output asserted when the reset conditions

were met for 26.4 μs and deasserted after 46.8 μs

of no reset conditions.

Output Current

The output current must not exceed 150 µA.

The output current was 110 µA under the reset

condition.

TLV841

SLVSFO5C – APRIL 2020 – REVISED JULY 2021

www.ti.com

20

Submit Document Feedback

Copyright © 2021 Texas Instruments Incorporated

Product Folder Links: TLV841