Monolithic Power Systems Inc. MP2611GL-P

Overview

MP2611GL-P from Monolithic Power Systems is a monolithic 1-cell Li-ion switching battery charger IC with integrated high-side P-Channel and low-side N-Channel MOSFETs, supporting dual-input (USBIN/ACIN) operation, programmable 2A charge current via external sense resistor RS1, ±0.5% battery voltage regulation accuracy, and full thermal/NTC/timer/safety protection. It targets compact portable devices requiring USB 2.0/3.0-compliant input current limiting and high-efficiency CC/CV charging.

For engineers reviewing the MP2611GL-P datasheet, MP2611GL-P pinout, MP2611GL-P application, or MP2611GL-P equivalent, this page delivers verified technical context, exact pin functions, real-world charge profile behavior, validated alternative options, and supply-chain support details - all grounded in the official MP2611 Rev. 1.12 datasheet and MPS application documentation.

Technical Context

The MP2611GL-P implements a synchronous buck topology with internal 130mΩ high-side PFET and 200mΩ low-side NFET, enabling up to 100% duty cycle for low VIN–VBATT headroom (≥200mV). Its dual-input architecture uses ACIN as primary power source and automatically falls back to USBIN when ACIN drops below 3.75V UVLO, with independent current-limit programming via RILIM on USBM pin.

Charge control employs two closed-loop regulators: one for constant-current (CC) mode using CSP–BATT sense voltage feedback (100mV threshold), and another for constant-voltage (CV) mode regulating VBATT to 4.2V ±0.5%. Status monitoring includes open-drain STAT1/STAT2 outputs, NTC thermistor window comparator (32%–74% VREF33), and internal 3-hour safety timer set by CTMR capacitor.

Key Specifications

Pinout & Package

MP2611GL-P is housed in a thermally enhanced 3mm × 4mm QFN-14 package with exposed thermal pad on underside for efficient heat dissipation in high-current charging applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ24075RGTR and SP6648EK-L/TR, MP2611GL-P uniquely integrates dual-input arbitration, 2A synchronous switching, hardware NTC window detection, and programmable USB current limits - delivering higher efficiency, smaller footprint, and full JEITA compliance without external support components.

Availability

MP2611GL-P is available at Aetrix Electronics and suitable for smartphones, portable media players, tablets, and Bluetooth headsets requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2611GL-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 core expertise in DC/DC conversion, battery management, and motor control.

The MP2611GL-P belongs to MPS's battery charging product line, designed specifically for space-constrained portable electronics requiring high-efficiency, dual-input, and JEITA-compliant Li-ion charging with minimal external components.

FAQ

What is the minimum input-to-battery voltage difference required for regulation?

The MP2611GL-P maintains regulation with as little as 200mV headroom (VIN – VBATT ≥ 200mV) due to its high-side P-Channel MOSFET architecture and 100% duty-cycle capability - critical for maintaining charge current near end-of-charge when VBATT approaches 4.2V.

How does the MP2611GL-P handle simultaneous ACIN and USBIN presence?

When both ACIN and USBIN are present, the MP2611GL-P automatically selects ACIN as the primary power source and disables USBIN path via internal FET control. The datasheet explicitly advises against this condition due to potential cross-conduction risk, so system design must ensure only one input is active at a time.

Can the safety timer be disabled, and how?

Yes, the internal safety timer can be fully disabled by connecting the TMR pin directly to AGND. When grounded, the timer circuit is bypassed and no time-out fault will occur - useful in applications where charge duration is managed externally or where continuous trickle charge is required.

What is the function of the VREF33 pin beyond powering STAT pull-ups?

VREF33 serves as the precision 3.3V reference for the internal NTC window comparator and provides regulated bias for external thermistor dividers. Its ±0.2V load regulation over 0–20mA ensures stable NTC voltage thresholds across varying sensor loading conditions.

Does the MP2611GL-P support battery voltage monitoring during system operation?

No - the MP2611GL-P does not provide a dedicated battery voltage readback output. It regulates VBATT to 4.2V ±0.5% but lacks an analog monitor pin or I²C interface; external ADC measurement of BATT is required for telemetry.

How is USB input current limit accuracy affected by input voltage variation?

USB input current limit accuracy remains within ±5% across the full 4.5–6V USBIN range, as confirmed by Figure 6 in the datasheet. This stability is achieved through internal current-mode regulation and trimmed reference circuitry, ensuring reliable USB 2.0/3.0 compliance regardless of adapter tolerance.

What happens to charge current when transitioning from USB to ACIN input during charging?

Upon ACIN rising above 3.75V UVLO, the MP2611GL-P seamlessly switches power source and reverts to CC regulation based on RS1 - restoring full 2A charge current if previously limited by USB input current setting. No restart or interruption occurs.