Monolithic Power Systems Inc. MP2632BGR-Z

Overview

MP2632BGR-Z from Monolithic Power Systems is a fully integrated switch-mode battery charger and boost converter IC for single-cell Li-ion/Li-polymer power banks. It delivers up to 3A charge current and 3A boost output, integrates VIN-to-SYS pass-through with OVP/OCP, supports 4.2V/4.35V/4.45V programmable charge voltage (±0.5%), and includes independent torch-on control and BATT_UVLO latch-off - enabling autonomous operation in portable power applications without MCU intervention.

For engineers reviewing the MP2632BGR-Z datasheet, MP2632BGR-Z pinout, MP2632BGR-Z application, or MP2632BGR-Z equivalent, this device is selected for high-density power bank designs requiring simultaneous charging, system power delivery, USB BC1.2 detection, voltage-based fuel gauge, and thermal/overvoltage/short-circuit protection in a single QFN-26 package.

Technical Context

The MP2632BGR-Z implements dual-path power management: a high-priority VIN-to-SYS pass-through path (with 47–62 mΩ R_DS(on)) and a buck-boost charge path. Its charge algorithm automatically sequences trickle → constant-current (up to 3A) → constant-voltage (4.2/4.35/4.45V) with ±0.5% accuracy and auto-recharge at 4.02–4.22V thresholds.

In boost mode, it regulates SYS output to 5.0–5.2V with programmable current limit (up to 3.0A via OLIM), light-load auto-shutdown, and integrated SCP/OVP. USB data-line signaling (DP2/DM2) supports BC1.2 DCP/SDP modes, while DP1/DM1 enables input source detection.

Key Specifications

Pinout & Package

MP2632BGR-Z is housed in a thermally enhanced QFN-26 (4mm × 4mm, 0.5mm pitch) package with exposed thermal pad. Pin 1 is located at top-left per top marking orientation; SW and PGND pins are optimized for low-inductance switching layout.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar all-in-one battery charger/boost converter applications.

Compared with BQ25895RTWR and IP5306, MP2632BGR-Z uniquely integrates charge, boost, USB signaling, fuel gauge, and torch control in one QFN-26 package - reducing total solution size by 40% and eliminating firmware dependency for feature-rich power banks.

Availability

MP2632BGR-Z is available at Aetrix Electronics and suitable for power bank systems, portable USB chargers, and smartphone backup batteries requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for MP2632BGR-Z 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

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP2632B product line targets highly integrated portable power management, specifically addressing the need for autonomous, MCU-free power bank solutions with USB compliance, thermal safety, and compact footprint.

FAQ

What is the function of the PB pin, and how does it control boost and torch modes?

The PB pin is a multifunction push-button input with built-in timing logic. A single press (>1.5ms) enables boost mode and illuminates LEDs for 5 seconds. Two presses within 1 second toggle the torch light (TC pin). A long press (>2.5s) manually disables boost. No external debouncing or MCU polling is required.

How does the MP2632BGR-Z handle USB input source detection and output signaling?

It uses DP1/DM1 to detect USB host/charger type (SDP/CDP/DCP) by measuring voltage and current signatures, then configures DP2/DM2 to signal back - e.g., shorting DP2/DM2 for DCP mode or applying 1.2V/1.2V for Apple-compatible charging - all without external components or firmware.

Can the charge voltage be set to 4.35V or 4.45V, and how is it configured?

Yes. Connect VB pin to GND for 4.35V, leave floating for 4.2V, or tie to VCC for 4.45V. Each setting achieves ±0.5% regulation accuracy across –40°C to +125°C, verified in production test and characterized in datasheet Table 7.

What protections are active during boost mode, and how do they behave on fault?

Boost mode includes output short-circuit protection (SCP), over-voltage protection (OVP at 5.8V), and over-current protection (OCP with 150µs blanking). On SCP, the battery is fully disconnected from SYS; normal operation resumes automatically after fault removal with no latch or reset required.

Is thermal regulation implemented, and what is the shutdown threshold?

Yes. Thermal regulation reduces charge current above 120°C to maintain safe die temperature. If junction temperature reaches 150°C, thermal shutdown activates with ~20°C hysteresis. Recovery occurs only after temperature falls below 130°C, ensuring robust operation in enclosed enclosures.

How is the 4-LED fuel gauge calibrated, and what battery voltage thresholds does it use?

The fuel gauge uses four fixed voltage thresholds referenced to the programmed VBATT_REG. In charge mode with 4.2V regulation, thresholds are 3.60V (1st), 3.80V (2nd), 4.00V (3rd), and 4.20V (4th), each with 500mV hysteresis - enabling unambiguous 4-level state-of-charge indication without calibration or lookup tables.

What is the minimum input voltage required to initiate charging, and how does input voltage regulation work?

Minimum VIN is 4.65V (per datasheet Section 6). Input voltage regulation maintains VIN at 4.65V by dynamically limiting input current when adapter capability is insufficient - protecting weak sources while sustaining system power via pass-through path before engaging charge mode.