Monolithic Power Systems Inc. MP2660GC-0000-P

Overview

MP2660GC-0000-P from Monolithic Power Systems is a 5V USB-compatible, I²C-controlled linear battery charger IC for single-cell Li-ion/Li-polymer batteries, featuring integrated power path management, ±0.5% battery voltage regulation accuracy, 455mA programmable input current limit, and 100mΩ battery FET for system supplement mode. It enables simultaneous system power delivery and battery charging in space-constrained wearable and portable devices.

For engineers reviewing the MP2660GC-0000-P datasheet, MP2660GC-0000-P pinout, MP2660GC-0000-P application, or MP2660GC-0000-P equivalent, key selection considerations include I²C-programmable charge parameters (VBATT_REG, ICC, VIN_MIN), thermal regulation at 120°C, battery UVLO programmability (2.4–3.1V), and WLCSP-9 package integration for ultra-compact PCB layouts.

Technical Context

The MP2660 implements a dual-FET power path architecture: a 300mΩ LDO FET between IN and SYS provides regulated 4.85–5.15V system output, while a 100mΩ battery FET between BATT and SYS enables seamless transition between charging and supplement modes. Its I²C interface controls 8-bit register-mapped functions including charge current (8–535mA), battery regulation voltage (3.600–4.545V), safety timer (3–12 hrs), and NTC temperature window thresholds.

Operation includes three-stage charging (pre-charge, CC, CV), auto-recharge triggered by 130–370mV drop below VBATT_REG, and robust protection: input OVP (6.00V), input UVLO (3.9V), battery OVP (VBATT_REG + 120mV), and thermal shutdown at 150°C with 20°C hysteresis. The INT pin supports host-controlled battery disconnect after 8s low pulse.

Key Specifications

Pinout & Package

MP2660GC-0000-P is housed in a 1.55mm × 1.55mm, 9-pin Wafer-Level Chip-Scale Package (WLCSP) with bottom-side ball layout. The package supports high-density routing and thermal dissipation in compact wearable PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ24210RGET and MAX1555ETA+, MP2660GC-0000-P delivers unique value through I²C-configurable power path behavior, programmable thermal regulation, and sub-15µA ship-mode current - critical for firmware-updatable wearables requiring long shelf life and adaptive charging.

Availability

MP2660GC-0000-P is available at Aetrix Electronics and suitable for smart watches, wireless earbuds, and fitness trackers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2660GC-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 power management ICs, with design focus on efficiency, integration, and miniaturization for portable and industrial applications.

The MP2660 belongs to MPS's battery management IC product line, engineered specifically for space-constrained, USB-powered Li-ion systems requiring autonomous power path control, programmable safety features, and ultra-low quiescent current.

FAQ

What is the maximum allowable input voltage for MP2660GC-0000-P?

The absolute maximum input voltage is +13V, but the recommended operating range is 4.35V to 5.5V for USB compatibility. Input over-voltage protection triggers at 6.00V (typical) with 335mV hysteresis, immediately disabling the IN→SYS FET to protect downstream circuitry.

How does the MP2660 handle system power when the battery is deeply discharged?

It maintains continuous SYS rail regulation at 4.85–5.15V using the IN→SYS LDO FET, even with 0V battery. The battery FET remains off until VBATT rises above pre-charge threshold (2.8–3.1V), ensuring system startup before charging begins.

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

Yes - the battery under-voltage lockout threshold is fully I²C-programmable from 2.4V to 3.1V (default 2.8V) via REG01h bits[5:0]. This allows customization for different Li-ion chemistries and aging compensation without hardware changes.

What is the purpose of the INT pin beyond fault reporting?

INT serves dual roles: (1) open-drain interrupt signaling charge status/faults to the host MCU, and (2) host-initiated battery disconnect - holding INT low for >8 seconds disables the BATT→SYS FET, entering ultra-low-leakage ship mode (<5µA).

Does the MP2660 support charging from non-USB sources?

Yes - it accepts any 4.35–5.5V DC source, including wall adapters and power banks. The input OVP (6.00V) and UVLO (3.9V) thresholds ensure safe operation, and VIN_MIN regulation prevents brownout during weak-source conditions like low-current USB hubs.

How is thermal regulation implemented, and can it be customized?

Thermal regulation is programmable via REG06h bits[1:0] with four settings (90°C, 100°C, 110°C, 120°C default). When die temperature exceeds the selected threshold, the IC linearly reduces charge current to maintain temperature - distinct from hard thermal shutdown at 150°C.

Is an external NTC thermistor required for safe operation?

Yes - the NTC pin requires a negative temperature coefficient thermistor connected in a resistor divider from IN to GND. Without it, temperature-based charge suspension is disabled, violating JEDEC/IEC 62133 safety requirements for Li-ion systems.