Monolithic Power Systems Inc. MP2632GR-Z

Overview

MP2632GR-Z from Monolithic Power Systems is a fully integrated, switch-mode single-cell Li-ion/Li-polymer battery charger and boost converter with power-path management, 3A programmable charge current, 3A programmable boost output current, 4.2V/4.35V/4.45V selectable charge voltage (±0.5%), and integrated 4-LED fuel gauge for power bank applications.

For engineers reviewing the MP2632GR-Z datasheet, MP2632GR-Z pinout, MP2632GR-Z application, or MP2632GR-Z equivalent, this device supports USB input detection (DP1/DM1), USB output signaling (DP2/DM2), torch-light control (TC), NTC-based temperature monitoring (NTC/VNTC), and automatic mode switching between charge, boost, and sleep - all in a 26-pin QFN (4mm×4mm) package.

Technical Context

The MP2632GR-Z implements dual-path power management: an IN-to-SYS pass-through path (with OVP/OCP priority over charging) and a synchronous buck-boost converter for battery-to-SYS reverse operation. Its control architecture integrates five independent regulation loops - input current (IIN_LMT), input voltage (VIN_REG), battery charge current (ICHG), battery voltage (VBATT_FB), and junction temperature (TJ) - enabling simultaneous system power delivery and battery charging without external MCU coordination.

In charge mode, it executes automatic three-phase charging (trickle → constant-current → constant-voltage) with auto-recharge and termination based on IBF threshold; in boost mode, it regulates SYS output at 5.1V ±100mV with programmable current limit (up to 3A), light-load auto-shutdown (16s timeout), and short-circuit protection that fully disconnects the battery.

Key Specifications

Pinout & Package

MP2632GR-Z is housed in a thermally enhanced 26-pin QFN package (4mm × 4mm, 0.5mm pitch) with exposed thermal pad (PGND-connected) for efficient heat dissipation in high-current power bank PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ25895RTWR and IP2326, MP2632GR-Z uniquely integrates USB BC1.2 signaling, torch control, NTC monitoring, and voltage-selectable charge thresholds in one QFN package - making it the only drop-in solution for MCU-free, safety-compliant, feature-rich power banks.

Availability

MP2632GR-Z is available at Aetrix Electronics and suitable for portable power banks, USB adapter designs, external battery packs, and rugged handheld tools requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.

Supply support for MP2632GR-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 MP2632 belongs to MPS's Power Bank & Portable Charger IC product line, engineered specifically to consolidate charging, boosting, USB detection/signaling, and fuel gauging into a single chip for MCU-free, space-constrained, and cost-sensitive portable power applications.

FAQ

What input voltage range does MP2632GR-Z support in normal operation?

The MP2632GR-Z operates within 4.65V to 6.0V for reliable charge mode functionality. It tolerates up to 14V input transiently (absolute maximum rating), but sustained operation above 6.0V triggers input over-voltage protection and disables the IN-to-SYS path. Input UVLO activates at 3.45V (typ.), ensuring clean startup from weak or recovering sources.

How is charge voltage selected between 4.2V, 4.35V, and 4.45V?

Charge voltage is set by the logic state of the VB pin: grounded = 4.35V, floating = 4.2V, and connected to VCC = 4.45V. This selection is latched at power-on and remains active throughout operation. The accuracy is ±0.5% across temperature, verified per electrical characteristics table (page 5 of datasheet Rev.1.0).

Does MP2632GR-Z support USB Type-C power delivery negotiation?

No. MP2632GR-Z supports only USB Battery Charging Specification v1.2 (BC1.2) for DCP/SDP/CDP detection and signaling via DP1/DM1 and DP2/DM2 pins. It does not implement USB PD communication, CC pin logic, or variable voltage output - it delivers fixed 5.1V in boost mode only.

Can the 4-LED fuel gauge operate during boost mode?

Yes. The voltage-based fuel gauge functions in both charge and discharge (boost) modes, using distinct threshold sets: four levels in boost mode (3.47V/3.62V/3.77V/3.92V) versus three in charge mode (3.6V/3.8V/4.0V). Each LED is driven independently as an open-drain output sinking up to 5mA.

What thermal protection mechanisms are implemented?

MP2632GR-Z includes two-tier thermal protection: junction temperature foldback initiates at 120°C (reducing charge current to maintain safe operating point), and hard thermal shutdown occurs at 150°C. Both are monitored continuously and recover automatically once die temperature falls below hysteresis thresholds (110°C and 140°C respectively).

Is external current-sense resistor RS1 required for charge current regulation?

Yes. RS1 (typically 10mΩ) is mandatory for high-side battery current sensing. The IC measures voltage across RS1 to regulate ICHG in CC mode and terminate at IBF threshold. Omitting RS1 disables charge current control and renders the device non-functional for battery charging.

How does the PB pin enable torch-light functionality?

The PB pin supports dual-press detection: pulling PB low for >1.5ms twice within one second toggles the TC pin output. TC is an open-drain driver capable of sinking ≥100mA, directly controlling an external NMOS torch LED driver. No external timing components or firmware are needed.