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EFP01 Energy Friendly PMIC

The EFP01 Energy Friendly Power Management IC (PMIC) is an extremely flexible, highly-efficient, multi-output power management IC, providing complete system power and primary cell battery Coulomb counting for EFM32 and EFR32 devices. These devices operate over a wide input voltage range (0.8 to 5.5 V) with quiescent current as low as 150 nA. EFP01 provides three voltage output rails and four supply outputs – 1x buck/boost converter, 1x buck-only DC-DC converter + LDO, 1x LDO and 1x switched – delivering up to 94% efficiency.

Supports Single alkaline, dual alkaline, single lithium and USB
Ideal for ultra-low-power battery-powered IoT devices

EFP01 PMIC Common Specs

Voltage Output A (VOA)

  • Output Voltage: 1.7 V to 5.2 V
  • DC-DC A can be configured in Buck/Boost, Buck-only, or Boost-only
  • DC-DC A output be combined with the VOC linear regulator for more efficient regulation as the input voltage approaches the output voltage
  • Firmware-programmable switched output (VOA_SW) allows complete powerdown of high leakage external circuitry in low power modes

Voltage Output B (VOB)

  • Output Voltage:
    • 0.8 V to 3.3 V (EFP0109/EFP0111)
    • 0.8 V to 1.255 V (EFP0104/EFP0108)
  • DC-DC B can be used only in Buck configuration
  • Dedicated internal linear regulator in parallel provides more efficient regulation as the input voltage approaches the output voltage

Voltage Output C (VOC)

  • Output Voltage: 1.7 V to 3.3 V
  • Linear regulator only
  • Can be used either to create an independent third output-supply or in conjunction with DC-DC A

Coulomb Counter

  • Lossless (i.e. no sense resistor) measurement of charge into the load

Communication & Control

  • Fully configurable I2C
  • Direct Mode supports fast transitions between energymodes
  • IRQ pin to notify host processor

Ultra-low Quiescent Current

  • 150 nA with no outputs enabled
  • 300 nA with a single output enabled
  • +125 nA for each additional output enabled


  • Programmable inrush current
  • Short-circuit tolerant outputs
  • Under-voltage lock-out (UVLO) circuitry holds device in lowest power reset state when VDDB is below 1.2 V
  • Over-temperature monitoring and IRQ assertion

Wide Operating Range

  • 0.8 V to 5.5 V input power supply
  • -40 to 100 °C junction temperature


  • QFN20 3x3 mm?
Find the Right EFP01 Device Select Columns
Select Columns
Part Number Vdd Range (V) Output Voltage Range (V) Number of Output Voltage Rails Lowest Quiescent Current (nA) Coulomb Counting Temperature Range oC I2C Dig I/O Pins Package Type Package Size (mm)
1.8 3.6 1.7 3.3 3 150 -40 85 1 2 QFN20 3x3
0.8 1.8 1.7 3.3 3 150 -40 85 1 2 QFN20 3x3
1.8 5.5 1.7 5.2 3 150 -40 85 1 2 QFN20 3x3
1.5 5.5 1.7 5.2 3 150 -40 85 1 2 QFN20 3x3

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