EFP01 - Power Management IC to Enhance Battery Life in IoT Product Design

EFP01 Power Management IC

Silicon Labs has come up with a new line of energy-friendly power management ICs namely EFP01 PMIC to address the power management needs of IoT developers by extending the energy efficiency of its wireless and MCU products. Simplifying product design with best-in-class tools and support, the feature-rich PMICs will serve as dedicated companion chips for EFR32 wireless devices and EFM32 microcontrollers (MCUs).


The all-new EFP01 PMIC family will offer a flexible, system-level power management solution, thereby enhancing the energy efficiency of battery-powered applications including IoT sensors, asset tags, smart meters, home, and building automation, security, and health and wellness products. These PMICs will enable developers to choose the optimal battery type and chemistries for their applications while controlling a product's power supply over multiple output rails and voltages.


The EFP01 is optimized for IoT connectivity platforms of Silicon Labs and eliminates the need to incorporate multiple vendor reference designs into a schematic or layout. Besides, it provides a turnkey power management companion solution for our wireless SoC and MCU families, combined with Simplicity Studio tools, reference designs, sample applications, and 'PMIC-aware' wireless stacks for easy development. The PMICS include low-voltage dc-dc converters and regulators along with a flexible mechanism to manage the power rails in system design.



  • Flexible input/output voltage: A wide input voltage range (0.8 V to 5.5 V) supports a large number of batteries, wide output voltages support a variety of peripherals, MCUs, and radios.
  • Flexible use cases: It enables buck and boost voltage conversion as well as combined boost and buck (boost bootstrap) supporting low-voltage, high-current rails for IoT products requiring coin cell batteries and higher transmit power (up to +20 dBm).
  • Multiple output power rails: IoT products can be powered by one low-cost PMIC using less board real estate and simplifying software/hardware design.
  • Low quiescent current: It is optimized for sleepy devices, offering quiescent current as low as 150 nA to reduce sleep current and improve battery life.
  • Coulomb counting: It supports coulomb counting, which provides vital information for battery life estimation and preventive maintenance.


The EFP01 PMICs in a 3 mm x 3 mm QFN20 package samples are available for sale and the price range starts at $0.55 (USD MSRP) in 10,000-unit quantities. The SLWRB4179B radio board priced at $39 (USD MSRP) and two PMIC evaluation boards each priced at $49 (USD MSRP) are available. Simplicity Studio that offers energy profiler and network analyzer tools, wireless stacks, and reference designs is made available for developers free of cost.

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