nPM1100 Power Management IC from Nordic Semiconductor Delivers Power to Your Circuits and Charges Battery

Nordic Semiconductor's new nPM1100 Power Management IC (PMIC) can deliver power to circuits and charge battery of your portable device designs.
nPM1100 2x2mm WISP

Nordic Semiconductor ASA entered the power management solutions market with their new nPM1100 Power Management IC (PMIC). The chip comes in a 2x2mm ultra-small form-factor yet packs everything for your portable solutions. It integrates a dual-mode configurable DC-DC step down buck converter and a battery charge controller. The input voltage ranges from 4.1V to 6.7V and delivers a maximum of 150mA to the regulated output. The battery charge controller can deliver up to 400mA and supports different battery chemistries.

The high efficiency buck regulator can reach up to 92% while maintaining specified output. This delivers clean power to nRF52 and nRF53 series SoC based applications. The regulator has two modes – Hysteritic and PWM modes. The Hysteric mode reduces power consumptions for low load conditions. PWM mode is suitable for high current needs. The chip supports USB power input and has USB detect function.

nPM1100 simplified block diagram
nPM1100 Block Diagram

nPM1100 Features

  • Ultra-small form factor PMIC
    • 2.075 x 2.075 mm WLCSP package
  • 400 mA battery charger
    • Automatic charging mode
    • For Li-ion and Li-Polymer batteries
    • Battery thermal protection
  • Highly efficient regulator
    • Up to 92 % power conversion efficiency
    • Hysteretic and PWM mode
    • Selectable outout voltage
    • 150 mA current limit
  • Input regulator with USB support
    • SDP, CDP, DCP port detection
    • Overvoltage protection
  • Ship mode that disables power output
  • Drivers for charge and error LEDs
  • -40°C to 85°C operating temperature

nPM1100 Specifications

Battery charger
Regulatory complianceJEITA compliant
Termination voltage4.1 V or 4.2 V selectable
Charge current20 mA to 400 mA
Input regulator
Input voltage4.1 to 6.7 V
Output voltage3.0 to 5.5 V unregulated
Overvoltage protection20 V transient
USB current limit100 mA or 500 mA
Buck regulator
Output voltage1.8, 2.1, 2.7 or 3.0 V
Current limit150 mA output
Quiescent currents800 nA typical, 460 nA in
ship mode
Battery voltage2.3 V to 4.35 V
Operating temperature-40°C to 85°C
nPM1100 Specifications

Nordic also announced the availability of an evaluation board for nPM1100 – the nPM1100 Evaluation Kit. The kit integrates all input and output pins, connectors and switches for setting the configuration. It can be powered through a micro-USB or an external DC supply.

nPM1100 Evaluation Kit

nPM1100 Pinout

nPM1100 Ball Assignments
PinNameFunctionDescriptionRecommended usage
A1D-Analog inputUSB D- data line 
A2D+Analog inputUSB D+ data line 
A3DECPowerSystem decoupling capacitor 
A4SWPowerBUCK converter output (to inductor) 
A5PVSSPowerGround (DC/DC) 
B1VBUSPowerInput supply 
B2VBUSPowerInput supply 
B3VOUTBSET1Digital I/OBUCK regulator output voltage selectionToggle only when the device is in Power OFF
B4VOUTBSET0Digital I/OBUCK regulator output voltage selectionToggle only when the device is in Power OFF
B5VOUTBPowerBUCK regulator output 
C1VSYSPowerSystem voltage output; automatically enabled after power-on reset 
C2VSYSPowerSystem voltage output; automatically enabled after power-on reset 
C3VTERMSETDigital I/OBattery charging termination voltage selection:0 to 4.10 V1 to 4.20 VToggle only when the device is in Power OFF
D3SHPHLDDigital I/OShipping mode hold 
D4SHPACTDigital I/OShipping mode activate 
D5ISETDigital I/OVBUS current limit selection:0 mA to 100 mA (SDP mode only)1 mA to 500 mA 
E1NTCAnalog inputNTC resistor 
E2ICHGAnalog inputCharge current limiting resistor 
E3ERRDigital OUTOpen-drain LED driver; enabled when error condition in charging 
E4CHGDigital OUTOpen-drain LED driver; enabled when battery is charging 
E5MODEDigital I/O0 – automatic1 – Forced PWM

nPM1100 Evaluation Kit Features

  • nPM1100 PMIC
    • All features enabled
    • Performance optimized layout
  • 400 mA battery charger
  • Highly efficient buck regulator
  • Input regulator that supports USB charging
  • Low quiescent currents
  • Requires no software to operate I/O
    • Pin headers to all pins on nPM1100
    • USB connector & battery connectors
  • LEDs for charge and error indication
  • Switches
  • Buttons to enter and exit ship mode
nPM1100 Reference Schematic


  1. nPM1100 Product Page
  2. nPM1100 Evaluation Kit Product Page
  3. nPM1100 Web Documentation
  4. nPM1100 Product Brief PDF

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Vishnu Mohanan

Vishnu Mohanan

Founder and CEO at CIRCUITSTATE Electronics

Articles: 88

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