Power Supply for NB-IoT Modems in Smart Meters with LiSOCl2 Batteries Reference Design


Design files


This reference design provides a power supply solution for NB-IoT (Narrow Band -Internet of Things ) in smart meter with LiSOCl2 Batteries applications. The design is a low standby current, high efficiency solution that will extend battery use time more than 50%.

  • Operating input voltage from 2V to 4V, fixed output voltage is 3.6V, output current is up to 320mA
  • 1μA quiescent current under light load condition
  • About 4 μA standby current at 85℃ under open load conditions
  • Up to 93% efficiency from 10mA to 320mA
  • Extend battery life time by wide input voltage range and high efficiency
  • Simulate NB-IoT load characteristic, which is easy to test
  • A small solution size with the minimum amount of external components
Output voltage options TIDA-050010.1
Vin (Min) (V) 2
Vin (Max) (V) 4
Vout (Nom) (V) 3.6
Iout (Max) (A) .32
Output Power (W) 1.152
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Boost- Synchronous

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

TIDRX70.PDF (138 K)

Detailed schematic diagram for design layout and components

TIDRX71.PDF (56 K)

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

TIDRX72.PDF (96 K)

Detailed overview of design layout for component placement

TIDRX74.ZIP (593 K)

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

TIDCEW5.ZIP (1818 K)

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

TIDRX73.PDF (456 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Boost converters (integrated switch)

TPS610990.7Vin Synchronous Boost Converter with 800 nA Ultra-Low Quiescent Current

Data sheet document-pdfAcrobat PDF open-in-new HTML
N-channel MOSFETs

CSD18533KCS60-V, N channel NexFET™ power MOSFET, single TO-220, 6.3 mOhm

Data sheet document-pdfAcrobat PDF open-in-new HTML
Real-time clocks (RTCs) & timers

LMC555World’s smallest 555 timer with low power, high accuracy and a Fmax of 3MHz

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

Technical documentation

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Type Title Date
* Design guide Power Supply for NB-IoT Modems in Smart Meters With LiSOCl2 Batteries Reference Oct. 01, 2018

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