Monolithic Power Systems Inc. MP2663GC-0000-P

Overview

MP2663GC-0000-P from Monolithic Power Systems is a fully integrated, I²C-controlled single-cell Li-ion/Li-polymer battery charger with independent system power path management. It delivers up to 500mA charge current, regulates system voltage to 5.2V, supports ±0.5% battery voltage accuracy, and operates from 4.35V–5.5V USB/AC input-enabling compact wearable and smart watch designs requiring simultaneous system power and battery charging.

For engineers reviewing the MP2663GC-0000-P datasheet, MP2663GC-0000-P pinout, MP2663GC-0000-P application, or MP2663GC-0000-P equivalent, key selection criteria include programmable input current limit (85–455mA), battery UVLO threshold (2.4–3.1V), thermal regulation at 120°C, shipping mode control via INT pin, and WLCSP-9 package compatibility with space-constrained PCB layouts.

Technical Context

The MP2663 implements a direct power path architecture with two integrated MOSFETs: a 330mΩ LDO switch from IN to SYS and a 100mΩ battery FET from BATT to SYS. This decouples battery charging from system load delivery, enabling autonomous charge termination while maintaining uninterrupted system operation-even during deep battery discharge or input source removal.

Its I²C interface (400kHz) configures all critical parameters-including VBATT_REG (3.600–4.545V), ICC (8–535mA), pre-charge current (6–27mA), safety timer, NTC temperature windows, and thermal shutdown threshold (120°C default)-and reports real-time status via open-drain INT pin with programmable fault signaling.

Key Specifications

Pinout & Package

MP2663GC-0000-P is housed in a 1.55mm × 1.55mm WLCSP-9 package optimized for ultra-thin portable devices. The die-side-up ball grid provides minimal footprint and low thermal resistance (θJA = 114°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ25618RTWR and MAX77751DEWI+, MP2663GC-0000-P offers the smallest footprint (1.55mm²), lowest quiescent current in shipping mode (4.5μA), and simplest integration for USB-powered wearables-making it optimal when board space, shelf-life, and firmware simplicity are primary constraints.

Availability

MP2663GC-0000-P is available at Aetrix Electronics and suitable for wearable fitness trackers, smart watches, and wireless earbud charging cases requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2663GC-0000-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 MP2663 belongs to MPS's battery management product line, engineered specifically for space-constrained portable electronics that demand integrated charging, power path control, and intelligent thermal/safety protection in a single WLCSP package.

FAQ

What is the minimum input voltage required for MP2663GC-0000-P to initiate charging?

The MP2663GC-0000-P requires a minimum input voltage of 4.35V to begin operation, per its input under-voltage lockout (VIN_UVLO) specification. Below this threshold, the IN-to-SYS LDO remains disabled, and no charging or system power delivery occurs-even if the battery is present. This ensures reliable startup only from valid USB or adapter sources.

How does the MP2663 handle simultaneous system load and battery charging when input current is limited?

When system load exceeds available input current, the MP2663 automatically reduces charge current via Dynamic Power Management (DPM) to maintain the 5.2V SYS rail. If load demand still exceeds input capability, it supplements power from the battery through the 100mΩ BATT FET-ensuring uninterrupted system operation without forcing premature battery discharge.

Can the battery UVLO threshold be adjusted after soldering, and what is its effective range?

Yes-the battery UVLO threshold is fully programmable via I²C register Reg01 bits[2:0], with a factory-default setting of 2.9V. The configurable range spans 2.4V to 3.1V in 0.2V steps, allowing customization for specific Li-ion chemistry or end-of-life voltage requirements without hardware changes.

What is the purpose of the INT pin beyond interrupt signaling, and how is it used in shipping mode?

The INT pin serves dual functions: (1) open-drain interrupt output for charge status/fault reporting, and (2) shipping mode control. Pulling INT low for ≥6 seconds disables the battery FET, reducing quiescent current to 4.5μA. This is essential for extending shelf life in consumer electronics shipped with charged batteries.

Does MP2663GC-0000-P support charging at temperatures below 0°C, and how is cold-temperature protection implemented?

No-charging is suspended below the NTC cold threshold (programmable, typically ~0°C). The MP2663 monitors NTC voltage as a percentage of VDD; when VCOLD falls below 63–67% VDD, it halts charging to prevent lithium plating. This is enforced by hardware comparators, not firmware, ensuring fail-safe operation even if host communication is lost.

What is the maximum allowable continuous charge current, and how is it set?

The maximum continuous charge current is 455mA, set via I²C register Reg02 bits[4:0] = 11111. This value is guaranteed across temperature and input conditions, with typical performance of 400–429mA at 25°C. Lower values (e.g., 127mA, 265mA) are selected for smaller cells or thermal-limited designs using the same register field.

How does the MP2663 ensure accurate battery voltage regulation despite PCB trace resistance?

The MP2663 uses dedicated feedback paths: VSYS_REG is regulated using internal reference and error amplifier tied to the SYS pin, while VBATT_REG is controlled via closed-loop sensing at the BATT pin. Its ±0.5% accuracy specification accounts for internal circuitry only-not external layout-and assumes proper 4.7μF ceramic capacitor placement directly at the BATT pin.