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nPM1304 Power Management IC

Highly integrated with unique system management features for small size batteries

The nPM1304 is a highly integrated multifunction Power Management IC (PMIC) that includes battery charger, an algorithm-based fuel gauge, two ultra-efficient step-down buck regulators, two LDOs / load switches, and comprehensive system management functions into a single device. It supports battery charge current as low as 4 mA. The nPM1304 reduces the bill of materials by replacing multiple discrete components while enabling greater design flexibility through a fully I²C-compatible TWI interface. 

The nPM1304 includes an algorithm-based battery fuel gauge solution with state of charge and state of health reporting. It is highly accurate, consumes ultra-low power and does not require any extra components. A rich set of system management features including a hardware watchdog, power-loss warning, hard-reset supervisory circuit, failed-boot recovery, ship and hibernate mode.A  

nPM1304 Datasheet [PDF | HTML] 

Battery management 

  • Linear battery charger 
    • Supported battery types: Li-ion, Li-poly, and LiFePO₄ 
    • Charge current: 4 - 100 mA 
    • Charging termination voltage: 3.5 – 4.45 V 
      • 50 mV termination voltage steps 
    • Battery input voltage: 2.3 - 4.65 V 
    • Dynamic power-path 
    • JEITA compliant 
    • NTC battery thermal protection 
  • Fuel gauge including battery health 
    • State of charge, state of health and cycle tracking 
  • System regulator 
    • USB type-C compliant with 100 mA, 500 mA, and 1500 mA current limit 
    • Input voltage: 4.0 – 5.5 V 
    • 22 V overvoltage protection 
    • Unregulated system rail 
      • Output voltage: 3 – 5.5 V  
      • Output current: 100mA (from battery), 1.5A (from USB) 

Voltage regulators 

  • Two buck regulators 
    • Output current: 200 mA 
    • Output voltage: 1.0 – 3.3 V 
      • 100 mV steps 
    • Automatic hysteretic and PWM mode switching, or forced PWM mode 
    • Power conversion efficiency up to 93% 
  • Two LDOs / load switches 
    • Output current: 50 mA (LDO) / 100 mA (load switch) 
    • Output voltage: 1.0 – 3.3 V 
      • 100 mV steps (LDO)

System management

  • Hard reset (one or two buttons)
  • Watchdog timer
  • Failed-boot recovery
  • Power loss warning
  • Ship mode: 370 nA
  • Hibernate mode: 500 nA
  • Five GPIOs
  • Three 5mA LED drivers
  • I²C compatible TWI 
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Key features
  • Supported batteries: Li-ion, Li-Po and LiFePO₄ 
  • USB-C compatible charger 
  • Overvoltage protection 
  • Fuel gauge including battery health 
  • Two buck regulators 
  • Two LDOs / load switches 
  • Ship & hibernate modes 
  • Hard reset 
  • Watchdog timer 
  • Failed-boot recovery 
  • Power loss warning 
  • Five GPIOs 
  • Three LED drivers 
  • TWI configuration interface 

nPM PowerUP

nPM PowerUP is a desktop application for controlling the nPM1304 Evaluation Kit (EK). Once connected to an EK, the app gives full control over the adjustable settings of the nPM1304 PMIC. Using the included battery models, you can also get an estimated time-to-full and time-to-empty when charging or discharging a battery connected to the EK. 

nPM PowerUP is found inside nRF Connect for Desktop. 

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nRF Connect for Desktop

nRF Connect for Desktop is a cross-platform framework for development applications. It contains applications for testing Bluetooth Low Energy and LTE links, power optimization, programming and more.

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