LP5910 and TPS61221 as Power Reference Design for devices Interacting with Ultra-Low Voltage MSP430


Design files


The MSP430X09X can operate form ultra-low voltages (ULV) in the range of 0.9V to 1.65V; however most of the devices in the system requires higher voltages. TIDA-00599 provides a solution for those companion devices that requires 1.8V and 3.3V input voltages.

A 3.3V voltage rail is generated from a 0.9V to 1.65 V batteries using the TPS61221 boost converter and a 1.8V voltage rail is generated using a high PSRR LDO (LP5910) connected in series with the boost converter output voltage rail. The combine output current is 100 mA at 1.65V input voltage and 50 mA at 0.90 V input voltage.

This power solution is deal to power sensors and peripherals from the same ultra-low voltage source powering the MSP430 family line.

  • Power management for devices interacting with the ultra-low voltage µController family (MSP430X09X) from a 0.9 V to 1.65 V single battery cell
  • Generates 1.8V and 3.3V voltage rails from an ultra-low voltage source
  • Combine output current
    • 50mA at 0.9V input voltage
    • 100mA at 1.65V input voltage
  • Ripple free and low noise 1.8 V voltage rail
  • Small solution size, with minimum compensation components
  • Cost efficient solution
  • TIDA-00599 provides design guide and design files of the power management solution
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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.

TIDUA73.PDF (1224 K)

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

TIDCB57.ZIP (1625 K)

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.

Linear & low-dropout (LDO) regulators

LP5910300-mA, low-noise, low-IQ, low-dropout voltage regulator with reverse current protection & enable

Data sheet: PDF | HTML
AC/DC & DC/DC converters (integrated FET)

TPS612210.7-VIN, 3.3-V fixed output voltage boost converter with 5.5-μA quiescent current

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430L0924 MHz MCU with 2KB ROM, 2KB SRAM, 8-bit ADC, 8-bit DAC, comparator, timer

Data sheet: PDF

Technical documentation

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* Design guide Ultra-Low Voltage MSP430x09x Companion Devices Design Guide Jun. 23, 2015

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