nPM1300 PMIC

Highly integrated PMIC with unique system management features.

The nPM1300 is a highly integrated multifunction Power Management IC (PMIC) that includes battery charger, an algorithm-based fuel gauge, two ultra-efficient buck regulators, two LDOs / load switches, and comprehensive system management functions into a single device. The nPM1300 reduces both board space and bill of materials while replacing multiple discrete components while enabling greater design flexibility through a fully I²C-compatible TWI interface.

The nPM1300 includes an algorithm-based battery fuel gauge solution with state of charge and state of health reporting. It comes with coulomb counter accuracy, ultra-low power operation 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 modes.

nPM1300 Datasheet [PDF | HTML]

Battery management

Linear battery charger
- Supported battery types: Li-ion, Li-poly, and LiFePO₄
- Charge current: 32 - 800 mA
- Charging termination voltage: 3.5 – 4.45 V
  - 50 mV termination voltage steps
- Battery input voltage: 2.3 - 4.45 V
- Dynamic power-path
- JEITA compliant
- Battery pack NTC input for battery protection and fuel gauging
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
- 22V overvoltage protection
- Unregulated system rail
  - Output voltage: 3 – 5.5 V
  - Output current: 1A (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

Block diagram

Battery fuel gauge for IoT devices

Accurate fuel gauging is essential for any battery‑powered device, giving users clear and reliable insight into how much energy is left and helping avoid unexpected shutdowns.

Nordic’s fuel gauging provides accurate state of charge information for all supported battery types. Battery state of health is also supported for rechargeable batteries - tracking actual capacity and aging over time to understand how the battery performs throughout its lifetime. This deeper insight helps devices stay reliable for longer and makes rechargeable battery replacement more predictable.

By combining high accuracy with ultra‑low power operation - including zero power consumption in sleep - and low system cost, the Nordic algorithm-based fuel gauge solution delivers accurate battery information without extra components, licensing fees, or impact on battery life.

The Fuel Gauge page brings together all documentation, development resources, support & training related to fuel gauging and battery health.