Low Power Battery Charge Management Reference Design for Wearables and IoT Applications


Design files


The TIDA-00761 is a power management solution using the bq25120 IC in a small form factor design targeted at low power wearable devices.  It integrates the most common functions for wearable devices: Linear charger, regulated output, load switch, manual reset with timer, and battery voltage monitor. The device supports charge currents from 5 mA to 300 mA.

  • Highly Integrated Solution
  • Small WCSP Package, 2.5 mm x 2.5 mm
  • 700 nA (typical) Iq with Buck Converter Enabled
  • Configurable Termiantion Current Down to 500 uA
  • I2C Communication Control (Optional)
  • Battery Voltage Monitor
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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.


Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


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


Detailed overview of design layout for component placement


Detailed overview of design layout for component placement

TIDRHO6.ZIP (1231 K)

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

TIDCB33.ZIP (677 K)

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

TIDRHO5.PDF (1409 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Battery charger ICs

BQ25120A300-mA linear battery charger with Power Path, integrated LDO and buck converter 1.8V default output

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide TIDA-00761 Test Results Sep. 28, 2015

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