Nexperia USA Inc. NBM5100BBQX

Overview

NBM5100BBQX from Nexperia is a coin-cell battery life booster IC that extends operational lifetime of lithium thionyl chloride (Li-SOCl₂) primary batteries in ultra-low-power IoT sensor nodes by decoupling high-pulse loads from the battery via dual-stage DC-DC conversion and adaptive capacitor charging. It delivers ≥150 mA regulated output at VDH, supports SPI interface, features 20 nA standby current, operates from −40 °C to +85 °C, and targets wireless sensor applications with burst transmission requirements.

For engineers reviewing the NBM5100BBQX datasheet, NBM5100BBQX pinout, NBM5100BBQX application, or NBM5100BBQX equivalent, this page provides verified technical context on its two-stage energy transfer architecture, SPI-configurable charge current (2–16 mA), VDH output regulation (1.8–3.6 V), capacitor balancing function, and thermal performance in DHVQFN16 package - all critical for low-power wireless node power design.

Technical Context

The NBM5100BBQX implements a proprietary two-stage topology: first stage draws constant current (2–16 mA) from VBT to charge an external storage capacitor (CAP), while second stage converts stored energy into a regulated, high-current VDH output using synchronous buck-boost switching across LX1/LX2. Its learning algorithm dynamically adjusts charge current to minimize residual voltage on CAP between pulses.

It uses SPI (CSN/SDI/SDO/SCLK) for configuration and status readback, includes integrated capacitor voltage balancing (BAL), early-warning RDY signaling, and permanent low-dropout VDP output (30 Ω typical resistance). All logic I/Os are referenced to VDP, not VBT, enabling robust interfacing with microcontrollers operating at different supply rails.

Key Specifications

Pinout & Package

Package: DHVQFN16 (SOT763-1), 2.5 mm × 3.5 mm × 0.85 mm, lead-free, thermally enhanced, with exposed ground pad soldered to PCB analog ground plane.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar battery life extension applications.

Compared with MAX17048 and TPL7407L, the NBM5100BBQX uniquely integrates adaptive capacitor-based energy buffering, dual regulated outputs, and SPI-configurable charge control - making it the only single-chip solution capable of extending coin-cell life in pulsed IoT applications without external power components.

Availability

NBM5100BBQX is available at Aetrix Electronics and suitable for LoRaWAN® sensor nodes, smart metering systems, and electronic shelf labels requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for NBM5100BBQX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert delivering high-performance, reliable, and efficient components for automotive, industrial, and consumer markets, with leadership in logic, MOSFETs, and power management.

The NBM5100 series belongs to Nexperia's battery life extension product line, designed specifically to overcome voltage droop and capacity loss in primary battery-powered IoT endpoints using intelligent energy buffering and adaptive optimization.

FAQ

What is the maximum supported storage capacitor value for NBM5100BBQX?

The datasheet specifies a maximum recommended CCAP value of 470 mF (470,000 µF). This limit ensures safe inrush current handling during initial charge and avoids exceeding internal current limits during fast recharge cycles. Larger capacitors may cause excessive stress on the charge FET or violate timing constraints for capacitor voltage sensing via VDHS.

Does NBM5100BBQX support automatic start-up without MCU intervention?

No - unlike the NBM5100A variant, the NBM5100BBQX lacks Auto Start functionality. It requires an active HIGH pulse on the SDI/START pin to initiate the first charge cycle. This gives the host MCU full control over energy transfer timing, enabling synchronization with sensor acquisition or RF transmission windows.

How does the RDY pin behave during early warning (EW) condition?

When VDH output approaches undervoltage due to falling CAP voltage, the RDY pin asserts a 2.6–6.5 µs pulse (Early Warning) before dropping low. This pulse serves as a hardware interrupt to trigger MCU action - such as aborting transmission or entering deeper sleep - preserving remaining capacitor energy for critical operations.

Can NBM5100BBQX operate with a 2.0 V input from a partially discharged Li-SOCl₂ cell?

Yes - the device has a minimum power-on reset (POR) threshold of 1.3 V at −40 °C and 1.3 V at 25–85 °C. At 2.0 V input, it operates normally in charging and active states, though charge current is reduced per the IVBT vs. VVBT curves (Fig. 22/24), ensuring continued functionality even near end-of-life battery voltage.