Power Supply Reference Design for GPRS Modems using LiSoCL2 Batteries


Design files


This design demonstrates how to power GPRS modems in smart meters using LiSoCL2 batteries. GPRS modems require peak current of up to 2A during transmission. This design reduces the peak load requirements on the battery by using the TPS61021A boost converter and a 20F super capacitor to provide the required transmit current. This reduces the overall cost of the system by allowing the use of lower cost LiCoCL2 batteries while maintaining a 10-year lifetime.

  • 0.7V to 4V input voltage range
  • Small boost converter solution
  • Efficiency is higher than 85% with 3V input voltage
  • More than 2A output current capability with 2.8V input
  • Ouput voltage dip less than 200mV
Output voltage options TIDA-01387
Vin (Min) (V) .7
Vin (Max) (V) 4
Vout (Nom) (V) 4
Iout (Max) (A) 2
Output Power (W) 8
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Boost- Synchronous
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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

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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

TIDRQO6.ZIP (1306 K)

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


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


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

AC/DC & DC/DC converters (integrated FET)

TPS61021A3-A Boost Converter with 0.5-V Ultra Low Input Voltage

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide Power Supply for GPRS Modules From LISOCL2 Battery Design Guide Apr. 27, 2017

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