Bipolar transistors

Diodes

ESD protection, TVS, filtering and signal conditioning

MOSFETs

SiC MOSFETs

GaN FETs

IGBTs

Analog & Logic ICs

Automotive qualified products (AEC-Q100/Q101)

NBM5100

Coin cell battery life booster with adaptive power optimization

The NBM5100A/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 3.6 V lithium thionyl chloride (Li-SOCl2), which are commonly used in wireless, low-power IoT sensor applications.

The NBM5100A/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

Auto

start

Pulse

ILOAD

NBM5100A

I²C

Yes

≥ 150 mA

NBM5100B

SPI

No

≥ 150 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: > 150 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

  • Integrated capacitor voltage balancing circuit

  • 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

Applications

  • 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

Parametrics

Type numberProduct statusBus interfaceAuto startStorage cap charge balance functionMax storage cap voltage (V)Pulse ILOAD [max] (mA)Package versionPackage name
NBM5100ABQProductionI²CYesSupported5.5150SOT763-1DHVQFN16
NBM5100BBQProductionSPINoSupported5.5150SOT763-1DHVQFN16

Package

Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
NBM5100ABQ
DHVQFN16
(SOT763-1)
SOT763-1SOT763-1_115ActiveM5100ANBM5100ABQX
( 9356 911 93115 )
NBM5100BBQ
DHVQFN16
(SOT763-1)
SOT763-1SOT763-1_115ActiveM5100BNBM5100BBQX
( 9356 911 94115 )

Environmental information

Type numberOrderable part numberChemical contentRoHSRHF-indicatorLeadfree conversion date
NBM5100ABQNBM5100ABQXNBM5100ABQ
NBM5100BBQNBM5100BBQXNBM5100BBQ
Quality and reliability disclaimer

Documentation (6)

File nameTitleTypeDate
NBM5100Coin 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

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