nPM1304 Power Management IC

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  

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