nPM1100 – Ultra-Small PMIC for Low Power Embedded Design

Nordic Semiconductor has launched its first PMIC nPM1100 for low power embedded system designs.

It combines a USB-compatible Li-ion/Li-Po battery charger and a highly efficient DC/DC buck regulator in a compact WLCSP package for space-constrained applications.

PCB area required for the whole circuitry is just 23 mm2. Its extremely small form factor makes it ideal for advanced wearables, connected medical devices, and other size-constrained applications.

nPM1100 - Ultra-Small PMIC for Low Power Embedded Design 1
Image Credit: Nordic Semiconductor

Technical Spec

  • Input Voltage from USB or Battery (2.3 V to 4.35 V)
  • Ultra-small form factor PMIC, 2.075 x 2.075 mm WLCSP package 
  • Battery charger (4.1/4.2V, 20 – 400mA current) 
    • Automatic charging mode
    • For Li-ion and Li-Polymer batteries
    • Battery thermal protection
  • Highly efficient regulator, efficiency up to 92%, Up to 150 mA 
  • USB compatible input regulator 
  • Overvoltage protection
  • Ship mode disables power output
  • Low quiescent currents (~700nA)
  • Drivers for charge and error LEDs 
  • -40°C to 85°C operating temperature
nPM1100 - Ultra-Small PMIC for Low Power Embedded Design 2
Internal Block Diagram on nPM1100

Ultra-low quiescent current

The nPM1100 features an ultra-low quiescent current (IQ) of 700nA (Typ.) which can be further reduced to 470 nA in “ship mode”. Ship mode also disables power output – removing the need for an external power switch and ensuring minimum battery lifetime impact on products in transit.

Nordic Semiconductor is also releasing nPM1100 Evaluation Kit so that developers can test the PMIC for their requirements before taking it into their design.

nPM1100 - Ultra-Small PMIC for Low Power Embedded Design 3

Availability and Cost (1.484$)

The PMIC will be available soon in samples from distributors like Mouser, Digikey, Avnet, Newark. The cost is just 2.5$ MOQ1 and 1.484$ MOQ500 as listed on Digikey

I am looking forward to test the chip as soon as available.

I wish they had an I2C interface for battery state of charge measurement and one more buck and boost regulator as an option. Generally, in many IoT devices where you have wireless connectivity other than BLE, you need a high current at 3-3v – 4.2V so an additional buck-boost would have been a more useful PMIC.

But, I am sure, they must be coming up with such options in their next version of devices.

For more details, please check their product page.

You can also check the evaluation board details and you can also download the Altium design files.

I hope you found this post useful.

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