Monolithic Power Systems Inc. MP2651GVT-010A-P

Overview

MP2651GVT-010A-P from Monolithic Power Systems is an I²C-controlled buck-boost battery charger IC optimized for 1-cell Li-ion/Li-polymer battery packs. It supports 4V–22V input, delivers up to 6A charge current, regulates battery voltage up to 4.67V/cell with ±0.5% accuracy at 25°C, and enables reverse source mode output (4V–21V, up to 6A) - used in compact USB PD-compliant power banks requiring bidirectional energy management.

For engineers reviewing the MP2651GVT-010A-P datasheet, MP2651GVT-010A-P pinout, MP2651GVT-010A-P application, or MP2651GVT-010A-P equivalent, this page provides verified functional identity, validated TQFN-30 pin mapping, confirmed 1-cell factory OTP configuration, real-world efficiency curves across charge/source modes, and I²C-register-level parameter configurability for input current limit, battery full voltage, and JEITA thermal thresholds.

Technical Context

The MP2651GVT-010A-P implements a synchronous 4-switch buck-boost topology with integrated N-channel MOSFET drivers (RON_Q1 = 10 mΩ, RON_Q2 = 8 mΩ, RON_Q3 = 8 mΩ, RON_Q4 = 20 mΩ), enabling seamless transition between buck and boost operation without discontinuity. Its dual-mode architecture supports both charging (CC/CV with trickle/pre/fast/termination phases) and regulated source mode (VIN_SRC feedback via FB or register-programmed 20mV/step resolution).

Control is fully implemented via I²C/SMBus interface (10–400 kHz), with 10-bit ADC monitoring battery voltage, input current, temperature (via NTC), and charge/discharge current (IMON/TS pin). Safety is enforced by configurable thermal regulation (120°C), thermal shutdown (150°C), input/battery OVP/UVP, and JEITA-compliant temperature profiling using VNTC bias and NTC sensing.

Key Specifications

Pinout & Package

TQFN-30 (4mm × 5mm) package with exposed thermal pad (PGND-connected), rated MSL 1, compatible with standard reflow profiles. Pin 1 marked by dot; top marking includes MPS prefix, year/week code, and lot number.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar buck-boost charger applications.

Compared with BQ25792RTWR and ISL9241IRZ-T7A, MP2651GVT-010A-P uniquely integrates USB PD 3.0 source mode with register-based 4V–21V output control and 1-cell factory OTP, reducing BOM count and firmware overhead in portable bidirectional power systems.

Availability

MP2651GVT-010A-P is available at Aetrix Electronics and suitable for power banks, wireless speakers, drones, and mobile printers requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.

Supply support for MP2651GVT-010A-P 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 power management ICs, with over 20 years of expertise in DC/DC conversion, battery management, and motor control.

The MP2651 product line targets portable bidirectional power systems, integrating charger, source regulator, safety monitoring, and I²C configurability into a single TQFN package - designed specifically for USB PD-enabled consumer electronics with space and thermal constraints.

FAQ

What does the "-010A" suffix indicate in MP2651GVT-010A-P?

The "-010A" suffix denotes the factory-programmed OTP (One-Time Programmable) configuration for 1-cell battery operation. This sets default register values for battery full voltage (4.35V), pre-charge threshold (3.0V/cell), and JEITA cold/warm thresholds optimized for single Li-ion cell use - eliminating need for initial I²C configuration in basic implementations.

How is thermal regulation implemented in the MP2651GVT-010A-P?

Thermal regulation activates at a user-configurable junction temperature (default 120°C via REG0Fh[14:12]), reducing charge current to maintain die temperature below threshold. Unlike thermal shutdown (150°C), regulation preserves operation while preventing thermal stress - critical for sustained high-current charging in enclosed enclosures like power banks.

Can the MP2651GVT-010A-P operate without an external NTC thermistor?

Yes - the device supports NTC floating detection (VNTC_FLT threshold at 95% of VVNTC) and can be configured to disable JEITA protection entirely via register writes. However, battery temperature monitoring is strongly recommended for safe Li-ion charging per IEC 62133, and omission voids safety certification compliance.

What is the role of the ACGATE pin, and what external component is required?

The ACGATE pin drives the gate of an external N-channel MOSFET used for input over-voltage protection. A 1MΩ resistor must be connected between ACGATE and the MOSFET's source terminal to ensure proper turn-off during ADP OVLO events. This enables fail-safe disconnection of the input adapter without relying on internal switches.

Does the MP2651GVT-010A-P support I²C clock stretching?

No - the MP2651GVT-010A-P does not implement clock stretching. Its I²C interface complies with standard SMBus timing (10–400 kHz), with maximum clock low timeout of 35 ms. Host controllers must adhere to strict setup/hold times (e.g., 250 ns data setup) and avoid stretching to prevent communication errors.

How is battery missing detection implemented?

Battery missing detection uses the SRP/SRN current-sense amplifier offset and internal comparators. When no battery is connected, the differential voltage across RS2 falls below –0.5 µA leakage threshold, triggering a dedicated fault flag (REG05h[5]) and asserting the INT pin - enabling system-level battery presence validation before enabling charge cycles.

What is the minimum input voltage required for source mode operation?

In source mode, the MP2651GVT-010A-P requires battery voltage ≥2.6V/cell (VBATT_UVLO threshold) to enable IN output. Below this, the device disables source mode and asserts battery UVLO fault. For 1-cell operation, this means ≥2.6V battery voltage is mandatory before VIN_SRC can be regulated and delivered.