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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 

Documentation

nPM2100 Datasheet [PDF | HTML] 

nPM2100 EK Hardware [PDF | HTML] 

nPM2100 Hardware Design Guidelines [PDF | HTML]   

Using the nPM2100 Fuel Gauge [PDF | HTML] 

Reverse battery protection for the nPM2100 PMIC [PDF | HTML]

nPM2100 Design Checklist [xlsx]