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nPM2100 Power Management IC

Primary-Cell with ultra-efficient boost regulator and fuel gauge

The nPM2100 is a Power Management IC specifically engineered for primary-cell battery applications, addressing the unique power management requirements of non-rechargeable battery-powered products. It supports Alkaline AA/AAA/LRxx cells (up to two in series), 3 V LiMnO₂ coin cells (CR2032 and similar), single- or dual-cell silver oxide and zinc-air coin-cell batteries, or any primary battery within 0.7–3.4 V input range. 

It features an ultra-efficient boost regulator, LDO and system management features and allowing it to operate from alkaline AA/AAA cells, 3 V lithium manganese dioxide (LiMnO₂) coin cells, and other primary batteries as they discharge from full voltage down to 0.7 V. 

The nPM2100 includes an algorithm-based battery fuel gauge and a rich set of system management features including a hardware watchdog, hard reset, failed-boot recovery, break-to-wake, ship and hibernate mode. The nPM2100 is your toolbox of power saving capabilities replacing multiple discrete components while enabling greater design flexibility through a fully I²C-compatible TWI interface. 

The nPM2100 included a unique mechanism to support short and high-peak burst currents without unnecessary wear on the battery

nPM2100 Datasheet [PDF | HTML] 

 

Battery management

  • Supported battery types
    • Alkaline AA/AAA/LRxx cells (up to two in series)
    • 3 V LiMnO₂ coin cells (CR2032 and similar)
    • Single- or dual-cell silver oxide and zinc-air coin-cell batteries
    • Any primary battery within 0.7–3.4 V input range
    • Fuel gauge
    • State of charge

Voltage regulators

  • Boost regulator
    • Output current: 150 mA
    • Output voltage: 1.8 – 3.3 V
      • 50 mV steps
    • Automatic switching between higher power, low power and ultra-low power modes, or pass-through mode
    • Quiescent current: 150 nA
    • Efficiency: up to 95% at 50 mA, 90.5% at 10 µA
  • LDOs / load switches
    • Output current: 50 mA
    • Output voltage: 0.8 – 3.0 V (LDO)
    • 50 mV steps (LDO)

System management

  • Hard reset
  • Watchdog timer
  • Failed-boot recovery
  • Ship mode: 35 nA
  • Hibernate mode: 175 nA
  • Two GPIOs
  • I²C compatible TWI
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Key features

  • Supported batteries: alkaline AA/AAA/LRxx (1S and 2S), 3 V LiMnO₂ coin cells, and other primary batteries 

  • Fuel gauge 

  • Ultra-efficient boost regulator 

  • LDO / load switch 

  • Ship & hibernate mode 

  • Break-to-wake

  • Hard reset 

  • Watchdog timer 

  • Failed-boot recovery 

  • Two GPIOs 

  • TWI configuration interface 

Download reference layout

for the nPM2100 PMIC

Selected version
0.2 QEAA layout and BOM resources

Changelog:

0.2 QEAA layout and BOM resources

Reference layout for the nPM2100 in QFN16 package

Download design

nPM2100 + nRF54L15 design example

nPM2100 + nRF54L15 Design Example

The nPM2100 + nRF54L15 Design Example has been developed by Seeed Studio in collaboration with Nordic Semiconductor. 

This minimal board design provides the essential circuitry and layout for basic operation and integration of the Bluetooth Low Energy SoC and Power Management IC. It serves as a foundational template, illustrating the critical connections and dependencies between components. Developers can use this design as a starting point, adding custom features and enhancements as needed for their specific applications.

Key power and RF performances, including conducted and radiated emissions levels have been validated for this design. 

 

The design is based on: