nPM2100 Power Management IC

Power Management IC (PMIC) with ultra-efficient boost regulator for primary-cell batteries

The nPM2100 PMIC enables longer run-time on every battery by implementing toolbox of power saving capabilities for primary cell batteries.

It features one boost converter that can provide voltages of 1.8 to 3.3 V output, from input voltages of 0.7 to 3.4 V. Examples of supported batteries are one or two AA/AAA/LRxx batteries (in series), or one 3V LiMnO2 cell. Single- or dual-cell silver oxide and zinc-air coin-cell batteries are also supported, or any other battery that operates within the PMICs input voltage range. 

The 150 nA iQ internal boost regulator places itself among the most efficient boost regulators on the market today. A 35 nA ship mode allows the device to be shipped with batteries inserted without draining the battery and eliminates the plastic pull-tab method of protecting batteries during shipping and storage. Hibernate mode includes timed wakeups for applications that spend most of their time in deep sleep, lowering sleep current to 175 nA extending battery lifetimes by up to 3x.

Designed to provide highly efficient power regulation for any primary-cell application, the nPM2100 comes with exceptional software support for Nordic’s nRF52, nRF53, and nRF54 Series of wireless multiprotocol Systems-on-Chip (SoC) in the nRF Connect SDK. The nPM2100 is also suitable for use with non-Nordic host devices.

The nPM2100 features precise algorithm-based fuel gauging. Standard voltage-based estimation is often inaccurate, leading to premature replacements or unexpected depletion. Instead, the nPM2100 uses a voltage and temperature-based fuel gauge on the host microprocessor for more accurate readings, ensuring full battery utilization with minimal additional load.

The nPM2100 comes in a compact 1.9 x 1.9 mm WLCSP and a versatile 4 x 4 mm QFN16 package.

To get the information from this page in a print friendly format, download the nPM2100 product brief. 

PDF IconDownload nPM2100 product brief [PDF]

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Key features
  • Ultra-efficient boost regulator, delivering up to 150 mA
  • 50 mA LDO/Load switch supplied by the boost regulator
  • 35 nA Ship Mode with multiple wakeup options
  • 175 nA Hibernate mode with wakeup timer 
  • Fuel gauge for primary cell batteries
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Low power high accuracy fuel gauging

tailored for embedded IoT

Estimating battery-state of non-rechargeable applications

Applications using non-rechargeable batteries, rarely have an indication of the remaining energy or operation time of the device. Instead manufacturers rely on the availability of replacement batteries, and the end-users ability to change the battery once the device dies. In certain situations, and for certain applications, it can be useful, not to say essential, for the end-user to know what the state-of-charge of their non-rechargeable device is.

Having this information available to the end-user could mitigate the temptation to preemptively change an only partially discharged battery, to ensure guaranteed operation of the device for a period of time. Giving the end-user the ability to confirm that the battery is, in fact, only partially discharged, creates an impression of a longer battery life. In turn this leads to a more satisfied customer and better reputation for the products battery life and it also lowers the products environmental impact by reducing battery waste.

The reason battery fuel gauging is not implemented in primary-cell powered applications are many, but mostly it is due to fact that the mainstream methods avaiable for estimating this gives inaccurate and unreliable results. That is why we, in the nPM2100 PMIC, implemented the same type of algorithm-based, highly accurate fuel gauge found in the nPM1300 PMIC, but for non-rechargeable batteries. The algorithms work with any combination of standard 1.5 V nominal AA or AAA alkaline batteries, 1S or 2S, as well as coin-cell and button-cell batteries, like CR2032 and LR44. More battery types will be supported based on reported customer needs. 

Learn how

Guide to accurate fuel gauging of primary-cell batteries

A practical guide to fuel gauge primary-cell batteries

To accurately estimate the battery state-of-charge in percent, from 0 to 100 %, the nPM2100's fuel gauge functionality uses an algorithms specially created by Nordic Semiconductor, tailored for the different non-rechargeable batteries on the market, as well as some key parameters measured by the PMICs hardware. The estimation algorithm can be run on any Arm Cortex M4 or M33, like those found in the nRF52, nRF53, nRF54 and nRF91 Series and does not require additional hardware beyond this.  

Learn how to implement fuel gauging for non-rechargeable batteries with the nPM2100: