Coin cell battery life booster with adaptive power optimization

The NBM7100A/B is a battery energy management device designed to maximize usable capacity from non-rechargeable, primary batteries when used in low-voltage, low-power applications requiring burst current loads. The devices overcome voltage drop and battery life limitations associated with extracting high pulse currents (Figure 1) from lithium primary batteries such as 3 V lithium manganese dioxide (LiMnO2) coin cells. which are commonly used in wireless, low-power IoT sensor applications.

The NBM7100A/B contains two stages of high efficiency DC-DC conversion and an intelligent learning algorithm. The first stage DC-DC conversion transfers energy from the lithium battery at a low constant current to a capacitive storage element. Once charged, a second DC-DC conversion cycle utilizes this stored energy to supply a regulated voltage with high pulse load current capability on the VDH output pin. The battery is never directly subjected to large load pulse currents, resulting in a longer, more predictable battery lifetime.

The proprietary learning algorithm monitors the energy used during repetitive load pulse cycles and optimizes first stage DC-DC conversion to minimize the residual charge in the storage capacitor.

A serial interface allows a microcontroller to change default configuration settings and read-back system information.

Table 1. Related devices

Type number

Bus interface








≥ 200 mA




≥ 200 mA

Figure 1. IoT pulsed load profile

Features and benefits

  • Programmable constant battery load current: 2 mA to 16 mA

  • Protection against battery voltage dips (Brown-out)

  • Pulse output current: > 200 mA

  • Low ripple regulated programmable output voltage, VDH: 1.8 V to 3.6 V

  • Ultra-low standby current: < 50 nA

  • Peak conversion efficiency > 90% with adaptive optimization

  • Integrated fuel gauge

  • Small 16 pin lead-free package (SOT763-1/DHVQFN16; 2.5 mm × 3.5 mm × 0.85 mm)

  • Specified from -40 °C to +85 °C


  • Battery powered wireless microcontroller applications (IoT): Bluetooth®, LoRaWAN®, Sigfox™, LTE-M, NB-IoT, Zigbee, etc.
  • Industrial: temperature, occupancy, e-metering, electronic shelf label, asset tracking, irrigation monitoring

  • Consumer/wearable: location tags, heart rate monitor, blood glucose meter, remote controls, key fobs

Figure 1. Simplified Application


Type numberProduct statusBus interfaceAuto startStorage cap charge balance functionMax storage cap voltage (V)Pulse ILOAD [max] (mA)Package versionPackage name
NBM7100ABQProductionI²CYesNot Supported11200SOT763-1DHVQFN16
NBM7100BBQProductionSPINoNot Supported11200SOT763-1DHVQFN16


Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
( 9356 911 95115 )
( 9356 911 96115 )

Environmental information

Type numberOrderable part numberChemical contentRoHSRHF-indicatorLeadfree conversion date
Quality and reliability disclaimer

Documentation (6)

File nameTitleTypeDate
NBM7100Coin cell battery life booster with adaptive power optimizationData sheet2023-06-29
nexperia_document_leaflet_battery_life_booster_NBM5100_NBM7100Coin cell battery life boosterLeaflet2023-06-22
DHVQFN16_SOT763-1_mkplastic, dual in-line compatible thermal enhanced very thin quad flat package; 16 terminals; 0.5 mm pitch; 3.5 mm x 2.5 mm x 0.85 mm bodyMarcom graphics2017-01-28
NBM5100_NBM7100_GUI_bert_v_1_9GUI for NBM5100 NBM7100 evaluation boardSoftware2023-10-27
UM90022NBM5100; NBM7100 Evaluation board moduleUser manual2023-07-11
SOT763-1plastic, leadless dual in-line compatible thermal enhanced very thin quad flat package; 16 terminals; 0.5 mm pitch; 3.5 mm x 2.5 mm x 1 mm bodyPackage information2023-05-11


If you are in need of design/technical support, let us know and fill in the answer form, we'll get back to you shortly.

Ordering, pricing & availability


As a Nexperia customer you can order samples via our sales organization or directly via our Online Sample Store: https://extranet.nexperia.com.

Sample orders normally take 2-4 days for delivery.

If you do not have a direct account with Nexperia our network of global and regional distributors is available and equipped to support you with Nexperia samples.