Monolithic Power Systems Inc. MP2625GL-P

Overview

MP2625GL-P from Monolithic Power Systems is a 2A synchronous buck switching battery charger IC with NVDC (Narrow Voltage DC) power path management for single-cell Li-ion batteries. It integrates input current limiting (up to 2A), programmable charge current (up to 2.2A), 1.6MHz switching frequency, and five independent control loops (input current/voltage, constant current, terminal voltage, thermal foldback). It enables immediate system operation with deeply discharged batteries in tablets and portable media players.

For engineers reviewing the MP2625GL-P datasheet, MP2625GL-P pinout, MP2625GL-P application, or MP2625GL-P equivalent, this page delivers verified technical context on NVDC power path behavior, SYS/BATT voltage regulation interplay, ILIM/ISET resistor programming, thermal shutdown at 150°C, and USB2.0/USB3.0 input compliance - all critical for portable power architecture validation.

Technical Context

The MP2625GL-P implements a fixed-frequency (1.6MHz) synchronous buck converter with integrated high-side (130mΩ) and low-side (100mΩ) NMOS switches, enabling efficient 4V–14V input-to-SYS regulation. Its NVDC architecture maintains independent control of SYS output voltage (programmable 3.5V–4.4V via SYSFB) and battery charging current (programmable up to 2.2A via ISET), even when VBATT < 3.4V.

Five closed-loop controls operate concurrently: input current limit (via ILIM pin or M0/M1 logic), input voltage clamp (via VLIM pin), constant-current/constant-voltage battery charge, terminal battery voltage regulation (4.2V ±32mV), and on-die thermal foldback (120°C activation, 150°C shutdown). The ideal diode mode activates when VSYS drops below VBATT –65mV, allowing BATT to supplement SYS load during input power shortage or removal.

Key Specifications

Pinout & Package

MP2625GL-P is housed in a thermally enhanced QFN-20 package (3mm × 4mm, 0.5mm pitch) with exposed thermal pad (Pin 5 = PGND). The package supports >2.6W continuous power dissipation at TA = +25°C (θJA = 48°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar single-cell Li-ion switching charger applications.

Compared with BQ24195RGER and RT9466GQW, MP2625GL-P uniquely delivers 2A charging, integrated ideal diode, programmable SYS voltage, and input voltage clamping - making it the sole option for robust, multi-source, space-constrained portable designs needing guaranteed system uptime.

Availability

MP2625GL-P is available at Aetrix Electronics and suitable for tablet PCs, portable media players, smartphones, and e-book readers requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for MP2625GL-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 analog and power ICs, with design centers in the US, China, and Taiwan.

The MP2625 belongs to MPS's battery management IC product line, engineered specifically for portable devices demanding high-efficiency, multi-source charging, and intelligent power path control without external FETs.

FAQ

What is the minimum battery voltage required to enable SYS output regulation?

The MP2625GL-P regulates SYS to 3.6V even when VBATT is as low as 0V, enabling immediate system operation with deeply discharged batteries. This is achieved by the NVDC architecture, which decouples SYS rail generation from battery voltage during startup - no external boost converter is needed to power the SoC before charging begins.

How does the ILIM pin interact with USB input modes?

The ILIM pin is ignored during USB input; the MP2625GL-P automatically selects 450mA (USB2.0) or 825mA (USB3.0) based on M0/M1 logic states. When an adapter is present, ILIM resistor programming takes precedence and sets the input current limit up to 2A - ensuring adapter overcurrent protection remains active regardless of USB mode configuration.

Can SYSFB be used to set SYS voltage below 3.5V?

No - the MP2625GL-P's internal error amplifier limits SYSFB-programmed output to a minimum of 3.5V. Attempting to set lower values via resistor divider results in regulation at 3.5V; this hard floor ensures sufficient headroom for most 3.3V SoC interfaces and prevents undervoltage lockout during transient load steps.

What happens when both input power and battery are present but SYS load exceeds input capability?

The MP2625GL-P enters ideal diode mode: the internal 40mΩ MOSFET connects BATT to SYS, allowing battery to supplement the deficit. This occurs when VSYS falls below VBATT –65mV, and continues until VSYS rises above VBATT +40mV - maintaining uninterrupted system operation without manual intervention or firmware control.

Is thermal foldback active during trickle charge?

Yes - thermal foldback (120°C activation) applies across all charge phases, including trickle charge. If die temperature exceeds 120°C while delivering 10% of programmed current, the MP2625GL-P linearly reduces charge current to maintain safe junction temperature, preventing thermal stress on low-voltage battery cells during recovery charging.

Does MP2625GL-P support charging from USB-C PD sources?

Yes - its 4–14V input range and programmable input current limit (up to 2A) allow direct interface with USB-C PD 5V/9V/12V profiles. However, PD communication must be handled by a separate PD controller (e.g., MPQ4230); MP2625GL-P manages only the power conversion and battery charging functions downstream.

What is the purpose of the VLIM pin beyond overvoltage protection?

VLIM enables dynamic input voltage optimization: by clamping VIN to just above the required SYS voltage (e.g., 4.8V for 4.4V SYS), it minimizes conduction losses in the buck stage and improves overall efficiency by up to 4% compared to unclamped operation at 12V input - especially valuable in thermally constrained portable enclosures.