Monolithic Power Systems Inc. MP2624GL-P

Overview

MP2624GL-P from Monolithic Power Systems is a 4.5A I²C-controlled switching-mode Li-ion/Li-polymer battery charger IC with narrow VDC (NVDC) power path management, USB OTG boost capability (5V/1.3A), and integrated reverse-blocking FET, high-side/low-side switches, and battery FET. It supports USB BC1.2 detection, input voltage/current regulation (3.9–7.0V, up to 3A), and operates in tablets, smartphones, and mobile internet devices.

For engineers reviewing the MP2624GL-P datasheet, MP2624GL-P pinout, MP2624GL-P application, or MP2624GL-P equivalent, key selection considerations include NVDC system priority during battery depletion, I²C-programmable charge voltage (±0.5% accuracy) and current (±5%), USB OTG enable control via register or OTG pin, and thermal shutdown at 184°C.

Technical Context

The MP2624GL-P implements constant-off-time (COT) control for fast transient response and reduced charging time under low input voltages, while its NVDC architecture decouples SYS and BATT via a 10mΩ battery FET to maintain system operation even with a fully depleted or absent battery. The device uses dual-path regulation: VSYS is held ≥ VSYS_MIN (I²C-settable 3.6V minimum) when VBATT is low, then tracks VBATT + ICHG × RBATFET above VSYS_MIN + 60mV.

Its integrated power path includes a 25mΩ reverse-blocking FET (IN→PMID), 25mΩ high-side NMOS, 28mΩ low-side NMOS, and 10mΩ battery FET-enabling 94% efficiency at 2A charging and 94% at 5V/1.2A OTG boost. USB detection uses DP/DM line sensing per BC1.2, and NTC-based temperature monitoring supports programmable hot/cold thresholds referenced to VNTC.

Key Specifications

Pinout & Package

MP2624GL-P is housed in a thermally enhanced QFN-22 package (3mm × 4mm, 0.5mm pitch) with exposed thermal pad. Pin numbering follows top-view layout; PGND and AGND are separate but must be connected externally at a single point near the IC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ25618RTWR and ISL9238HRTZ-T, the MP2624GL-P uniquely combines 4.5A charging, BC1.2-compliant USB detection, integrated 5V/1.3A OTG, and QFN-22 footprint-making it optimal for space-constrained consumer portables requiring autonomous input negotiation and high-current charging.

Availability

MP2624GL-P is available at Aetrix Electronics and suitable for tablet PCs, smartphones, and mobile internet devices requiring stable component supply, IEC 62368-1 safety certification, and production-ready NVDC power path implementation.

Supply support for MP2624GL-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 across Asia and North America and global manufacturing partnerships.

The MP2624 belongs to MPS's battery management IC product line, engineered specifically for high-efficiency, software-configurable charging in portable consumer electronics with stringent size, thermal, and safety requirements.

FAQ

What is the minimum system voltage (VSYS_MIN) supported by MP2624GL-P, and how is it set?

The MP2624GL-P supports a programmable minimum system voltage of 3.6V, set via I²C register REG01[2:0]. This value ensures the system remains powered even with a completely depleted or removed battery. The actual VSYS is regulated to this minimum or slightly above VBATT, depending on operating mode and I²C configuration of the ∆V offset (50mV or 100mV).

How does MP2624GL-P handle USB On-The-Go (OTG) functionality, and what are the current limits?

The MP2624GL-P provides 5V OTG output with ±2% regulation accuracy and two selectable current limits: 0.5A or 1.3A, configured via I²C register REG02[1:0]. OTG mode is enabled exclusively through I²C command-not hardware pin assertion-and automatically enters ideal diode mode when input power is detected, preventing backfeed into the charger.

Can MP2624GL-P operate without a battery connected, and what system behavior results?

Yes-the MP2624GL-P supports true "instant-on" operation with no battery or a fully depleted battery due to its NVDC architecture. When VIN is present, the system output (SYS) is regulated to ≥3.6V, allowing the host processor and peripherals to power up and function normally while the battery charges in the background once connected or recovered.

What thermal protection mechanisms are built into MP2624GL-P, and at what thresholds do they activate?

The MP2624GL-P features junction-temperature-based thermal regulation and shutdown. Thermal limiting begins reducing charge current above 125°C, and hard thermal shutdown activates at 184°C (rising threshold) with 20°C hysteresis. These thresholds are guaranteed by design and require no external components-only proper PCB thermal pad layout per datasheet guidelines.

How is battery temperature monitored, and what NTC configurations are supported?

Battery temperature is monitored via the NTC pin using a resistive divider between VNTC (internal 1.2V reference) and the NTC thermistor to AGND. The device supports four programmable thresholds-cold, cool, warm, and hot-defined as percentages of VNTC (e.g., cold = 70.9–72.1% of VNTC). Charge suspends if sensed voltage falls outside the configured window.

Does MP2624GL-P support shipping mode, and how is it activated?

Yes-shipping mode is enabled via the DISC pin (active-low) combined with I²C register control. A 6.6ms low pulse on DISC disables the battery discharge FET and reduces quiescent current to <65μA, preventing battery drain during logistics and storage. Full functionality resumes upon DISC high-to-low transition or I²C wake command.

What input current limits are supported, and how are they selected?

The MP2624GL-P supports USB-compliant input current limits of 100mA, 150mA, 500mA, and 900mA. These are selected either by resistor on the ILIM pin (analog method) or via I²C register REG00[2:0] (digital method). The final limit is the lower of the two settings, ensuring robust overcurrent protection regardless of configuration method.