Monolithic Power Systems Inc. MP2651GVT-010A-Z

Overview

MP2651GVT-010A-Z from Monolithic Power Systems is an I²C-controlled buck-boost battery charger IC optimized for single-cell Li-ion/Li-polymer battery packs. It supports 4V–22V input, delivers up to 6A charge current, regulates battery voltage to 4.67V with ±0.5% accuracy at 25°C, and enables reverse source mode output (4V–21V, up to 6A) - used in compact portable power banks requiring USB PD 3.0 compliance and thermal-safe charging.

For engineers reviewing the MP2651GVT-010A-Z datasheet, MP2651GVT-010A-Z pinout, MP2651GVT-010A-Z application, or MP2651GVT-010A-Z equivalent, this page delivers verified functional identity, validated TQFN-30 pin mapping, confirmed 1-cell factory OTP configuration, real-world efficiency curves, and precise I²C-register-addressable parameters including VIN limit, IIN_SRC, and JEITA temperature thresholds.

Technical Context

The MP2651 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 regardless of VIN vs. VBATT relationship. Its dual-mode architecture supports both charge mode (CC/CV with trickle/pre/fast/termination phases) and reverse source mode (regulated IN output with OVP/UVP/SCP).

Control is fully implemented via I²C/SMBus interface (1.8V/3.3V compatible, 10–400 kHz clock), with 10-bit ADC monitoring VNTC, IMON/TS, and system voltages. Safety is enforced by configurable thermal regulation (120°C threshold), battery OVP (230 mV/cell), input UVLO/OVLO, and JEITA-compliant NTC-based temperature protection across cold/cool/warm/hot zones.

Key Specifications

Pinout & Package

MP2651GVT-010A-Z is housed in a thermally enhanced TQFN-30 (4mm × 5mm, 0.5mm pitch) package with exposed thermal pad. Pin assignment follows MPS standard layout with dedicated high-current paths (IN, BATT, CFLR, SRP/SRN), dual bootstrap nodes (BST1/BST2), and isolated analog/digital grounds (AGND/PGND).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ25792RTWR and ISL9241IRZ-T, MP2651GVT-010A-Z uniquely combines factory-optimized 1-cell OTP configuration, USB PD 3.0-native source mode, and 6A bidirectional current capability in a 4mm×5mm footprint - delivering highest integration for consumer-grade portable power.

Availability

MP2651GVT-010A-Z is available at Aetrix Electronics and suitable for power banks, wireless speakers, drones, and mobile printers requiring stable component supply, consistent 1-cell factory configuration, and long-term lifecycle support.

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

The MP2651 belongs to MPS's high-integration battery charger product line, designed specifically for portable electronics requiring bidirectional power flow, USB PD compliance, and JEITA-compliant thermal safety in minimal PCB area.

FAQ

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

The "-010A" suffix denotes the factory-programmed OTP configuration for 1-cell battery applications, setting default battery full voltage to 4.67V and enabling optimized charge profiles for single Li-ion/Li-polymer cells. This eliminates the need for post-manufacturing I²C programming to achieve basic 1S operation.

Can MP2651GVT-010A-Z 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 temperature monitoring. However, JEITA protection and thermal regulation remain active via the internal die temperature sensor (TS/IMON pin), ensuring safety even without external NTC.

How is reverse source mode enabled and controlled?

Source mode is activated by writing to REG09h (VIN_SRC setting) and REG0Ah (IIN_SRC limit). The FB pin serves as feedback when external resistive division is used; otherwise, output voltage is set digitally. IN output OVP/UVP thresholds are independently programmable via REG11h bits[14:11].

What is the purpose 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 pass-through and over-voltage protection. A 1MΩ resistor must be connected between ACGATE and the MOSFET source. This enables adapter presence detection (ACOK) and fast OVP response without relying on internal switches.

Does MP2651GVT-010A-Z support I²C clock stretching?

No - the MP2651 does not implement I²C clock stretching. It uses standard SMBus timing with maximum 400 kHz clock frequency, 4 µs start hold time, and 300 ns data hold time. Host controllers must adhere to these timing constraints without expecting stretch responses.

What is the minimum recommended input capacitance for stable operation?

MPS specifies four 10µF X7R ceramic capacitors placed close to the IN pin and PGND. Total effective capacitance should exceed 30µF with low ESL/ESR to suppress high-frequency switching noise and sustain 6A peak currents during buck-boost transitions.

How does thermal regulation differ from thermal shutdown?

Thermal regulation (configurable up to 120°C) dynamically reduces charge current to maintain die temperature at the set threshold, allowing continued safe operation. Thermal shutdown (150°C, 20°C hysteresis) forces complete device disablement until temperature falls below 130°C - a last-resort safety mechanism.