Monolithic Power Systems Inc. MP2623GR-P

Overview

MP2623GR-P from Monolithic Power Systems is a monolithic, step-down switching charger IC for 1- or 2-cell LiFePO4 battery packs, integrating a 0.2Ω high-side MOSFET, peak-current-mode control, ±0.75% battery voltage regulation accuracy, and programmable up to 2A charge current. It delivers up to 90% efficiency at 1.1MHz fixed switching frequency and supports preconditioning of deeply depleted batteries in portable power tools and handheld terminals.

For engineers reviewing the MP2623GR-P datasheet, MP2623GR-P pinout, MP2623GR-P application, or MP2623GR-P equivalent, key selection criteria include its dual-cell LiFePO4 support, NTC-based temperature monitoring with programmable thresholds, integrated TMR timer for safe charge termination, and dual-loop (voltage + current) regulation architecture optimized for stable constant-current/constant-voltage charging profiles.

Technical Context

The MP2623GR-P implements peak-current-mode control with a 1.1MHz oscillator, enabling fast transient response and simplified loop compensation via separate COMPV (voltage-loop) and COMPI (current-loop) pins. Its dual feedback architecture uses GMI and GMV transconductance amplifiers to dynamically select between CC and CV regulation based on real-time battery voltage and sensed current through RS1.

It integrates an internal 3.3V LDO (VREF33) capable of sourcing ≤30mA, a 0.1µA TMR timer current source for configurable charge timeout, and a built-in NTC window comparator with factory-trimmed thresholds referenced to VREF33-enabling precise thermal monitoring without external op-amps or ADCs.

Key Specifications

Pinout & Package

MP2623GR-P is housed in a thermally enhanced 4mm × 4mm QFN-16 package with exposed thermal pad on underside. The package supports high-power dissipation (θ_JA = 46°C/W) and requires proper PCB copper pour under the pad for reliable thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LiFePO4 battery charging applications.

Compared with MP2625GR-Z, MP2623GR-P provides optimal thermal performance in 4×4mm QFN for 2A applications, while BQ24610RGER trades integration for configurability-making MP2623GR-P the preferred choice for cost-sensitive, space-constrained LiFePO4 chargers requiring ≤2A.

Availability

MP2623GR-P is available at Aetrix Electronics and suitable for power tools, handheld terminals, and medical portable monitors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2623GR-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 MP26xx series targets standalone LiFePO4 charging applications, emphasizing integration, safety compliance (thermal/NTC/timer), and minimal external component count for portable industrial equipment.

FAQ

What is the maximum supported battery configuration for MP2623GR-P?

The MP2623GR-P supports both 1-cell (3.6V float) and 2-cell (7.2V float) LiFePO4 battery packs. Cell count is selected via the CELLS pin: grounded for 1-cell, floating or tied to VREF33 for 2-cell. It does not support 3+ cells or other chemistries like Li-ion or Li-poly without external modifications.

How is charge current programmed, and what is the tolerance?

Charge current is set by an external sense resistor RS1 between CSP and BATT pins, using the formula ICHG = 0.2V / RS1. At RS1 = 100mΩ, typical ICHG = 2.0A with ±10% variation across temperature and process corners, as specified in the Electrical Characteristics table (ICC = 1.8–2.2A).

Does MP2623GR-P require external compensation components?

Yes-separate compensation networks are required for stable operation: a resistor and capacitor from COMPV to GND for voltage-loop stability, and another RC network from COMPI to GND for current-loop stability. Typical values are provided in the datasheet's Application Information section.

Can MP2623GR-P operate without an NTC thermistor?

Yes-the NTC function is optional. If the NTC pin is left unconnected or tied to a fixed voltage within the valid window, thermal protection is disabled. However, for UL/IEC 62368-1 compliance in consumer/industrial products, NTC monitoring is strongly recommended and often mandatory.

What is the purpose of the ACOK pin, and how should it be used?

ACOK is an open-drain indicator that goes LOW when a valid input supply is present (VIN > VBATT + 300mV and VCC above UVLO). It must be pulled up externally (e.g., 10kΩ to 3.3V) and is commonly used by system microcontrollers to enable power-path MOSFETs or disable battery discharge during charging.

Is MP2623GR-P compatible with lithium iron phosphate batteries only?

Yes-MP2623GR-P is specifically designed and trimmed for LiFePO4 chemistry, with fixed 3.6V/cell (1-cell) and 7.2V/cell (2-cell) float voltages. Its trickle threshold (2.52V/cell), recharge threshold (3.42V/cell), and CV regulation are chemically optimized and not user-adjustable for other battery types.

What is the minimum input-to-battery voltage differential required?

The MP2623GR-P requires a minimum VIN–VBATT differential of 180mV for proper reverse-blocking operation, as specified in the Electrical Characteristics table. This ensures the internal high-side MOSFET remains fully enhanced and prevents battery backfeed into the input rail.