Monolithic Power Systems Inc. MP2633GR-Z

Overview

MP2633GR-Z from Monolithic Power Systems is a 1.5A synchronous switch-mode single-cell Li-ion/Li-Polymer battery charger with integrated power path management and bidirectional boost OTG capability. It delivers precise 3.6V/4.2V charge voltage (±0.5%), supports input-current limiting (400–2200mA), and provides up to 91% efficiency in 5V boost mode at 1A for portable power-bank applications.

For engineers reviewing the MP2633GR-Z datasheet, MP2633GR-Z pinout, MP2633GR-Z application, or MP2633GR-Z equivalent, key selection criteria include programmable charge current (via ISET), input-voltage regulation (via REG), thermal regulation at 120°C, and dual-mode operation (charge/boost) controlled by PWIN and MODE pins.

Technical Context

The MP2633GR-Z implements a synchronous buck-boost architecture with independent control loops for input current, input voltage, battery charge current/voltage, and junction temperature. Its power path management dynamically prioritizes system load over battery charging when input power is constrained.

In charge mode, it executes trickle → constant-current → constant-voltage charging with auto-recharge and programmable termination (2.5–17.5% of CC). In boost mode, it regulates SYS output between 4.2V–6V with programmable current limit (1–1.44A) and short-circuit recovery.

Key Specifications

Pinout & Package

MP2633GR-Z is housed in a thermally enhanced QFN-24 (4mm × 4mm) package with exposed thermal pad (PGND). The package supports high-power density designs and efficient heat dissipation in space-constrained portable systems.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar battery charge management applications.

Compared with BQ24195RGER and MAX14745ETA+, the MP2633GR-Z uniquely combines input-voltage regulation, 1.5A charge current, and 91% 5V boost efficiency in a 4×4mm QFN - making it optimal for space-constrained, USB-powered power banks where input source stability and OTG runtime are critical.

Availability

MP2633GR-Z is available at Aetrix Electronics and suitable for portable power banks, smartphone sub-batteries, and USB-C accessory chargers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2633GR-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 core expertise in DC/DC conversion, battery management, and motor control.

The MP2633 belongs to MPS's integrated battery charge management product line, designed specifically for compact, high-efficiency portable electronics requiring simultaneous charging and system power delivery.

FAQ

What is the function of the REG pin on MP2633GR-Z?

The REG pin provides feedback for the input-voltage regulation loop. Connecting an external resistor divider from VIN to GND sets the regulation threshold (typ. 4.75V). When input voltage drops near this value, the IC reduces charge current to maintain stable input voltage - critical for weak USB sources or shared power rails.

How does MP2633GR-Z handle battery temperature monitoring?

It uses the NTC pin to interface with a negative-temperature-coefficient thermistor. The IC compares the divided NTC voltage against internal thresholds: 65–67% of VSYS for low-temp cutoff (e.g., 0°C) and 34–36% for high-temp cutoff (e.g., 50°C), enabling JEITA-compliant charging without external comparators.

Can MP2633GR-Z operate without an external microcontroller?

Yes. It operates autonomously using hardware-configured pins: PWIN detects input presence, MODE selects boost/sleep, and VB sets 3.6V/4.2V full-charge voltage. Status pins (CHG, BOOST, ACOK) provide direct LED or GPIO indication without firmware intervention.

What protection features prevent damage during abnormal conditions?

It integrates input over-voltage (20V abs max), battery over-voltage (103.3% full voltage), thermal shutdown (150°C), battery temperature fault detection, programmable safety timer (360 min max), and output short-circuit auto-recovery - all implemented in hardware with no software dependency.

Is MP2633GR-Z compatible with both 3.6V and 4.2V lithium chemistries?

Yes. The VB pin selects full-charge voltage: grounding VB sets 3.6V (LiFePO₄), leaving it floating or pulling high sets 4.2V (standard Li-ion/Li-Po). Both options maintain ±0.5% accuracy across temperature and lifetime, ensuring chemistry-specific safety compliance.

How is boost-mode output current limited and adjusted?

Boost output current is set by an external resistor (ROLIM) from OLIM to GND. With RS1 = 40mΩ, 100kΩ yields 1–1.44A limit (±20%); 63.4kΩ yields 1.5A. The IC monitors CSP/CSN and folds back SYS voltage if current exceeds the programmed limit - protecting both battery and load.