TIDA-00670

Low-Cost, Flexible Voltage Supervisor and Battery Tester Reference Design

TIDA-00670

Design files

Overview

This is a low-cost, flexible voltage supervisor that uses a voltage reference in order to test the voltage of a battery. This solution can also be used as a voltage rail monitor for many applications that require accurate power delivery with multiple rails. With TI's ultra-low power voltage references, the total system power consumption is reduced, while maintaining a low BOM cost. Testing and displaying the battery voltage provides an example of how easily this can be designed and implemented in comparable applications.

Features
  • The ATL431 shunt regulator allows for voltage regulation with minimal current consumption (60 µA)
  • TLV61225 boost converter enables the entire circuit to be powered from a AA battery (0.8 V to 3.3 V Input)
  • User Configurable resistor ladder creates customizable number of voltage rails for supervision
  • Low Cost to design for customized voltage supervision
  • Footprint can fit on the backside of a single AA battery voltage holder
  • No Firmware or Software Needed

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUAI3.PDF (1551 K)

Reference design overview and verified performance test data

TIDRHC3.PDF (312 K)

Detailed schematic diagram for design layout and components

TIDRHC4.PDF (197 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRHC5.PDF (76 K)

Detailed overview of design layout for component placement

TIDRHC7.ZIP (1627 K)

Files used for 3D models or 2D drawings of IC components

TIDCB03.ZIP (291 K)

Design file that contains information on physical board layer of design PCB

TIDRHC6.PDF (268 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Shunt voltage references

ATL4312.5-V low-IQ adjustable precision shunt regulator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Boost converters (integrated switch)

TLV61225Single cell 3.3V output voltage high efficient step-up converter in 6 pin SC-70 package

Data sheet document-pdfAcrobat PDF open-in-new HTML
Comparators

LM339Quad differential comparator

Data sheet document-pdfAcrobat PDF open-in-new HTML
ESD & surge protection ICs

TPD1E10B0612-pF, ±5.5V, ±30-kV ESD protection diode in 0402 and SOD-523 package

Data sheet document-pdfAcrobat PDF open-in-new HTML
Load switches

TPS27081A8-V, 3-A, 44-mΩ load switch with adj. rise time

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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* Design guide Low-Cost Flexible Voltage Supervisor and Battery Tester Design Guide Aug. 31, 2015

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