Monolithic Power Systems Inc. MP2664GG-0000-P

Overview

MP2664GG-0000-P from Monolithic Power Systems is a fully integrated, I²C-controlled, single-cell Li-ion/Li-polymer battery charger with independent power path management in a QFN-10 (2mm×2mm) package. It delivers up to 455mA charge current, supports USB 5V input, provides ±0.5% battery voltage regulation accuracy at 4.2V, and integrates dual FETs (300mΩ IN→SYS LDO + 100mΩ BATT→SYS switch) for simultaneous system powering and battery charging-enabling reliable operation in wearable devices with deeply discharged batteries.

For engineers reviewing the MP2664GG-0000-P datasheet, MP2664GG-0000-P pinout, MP2664GG-0000-P application, or MP2664GG-0000-P equivalent, key selection considerations include I²C-programmable input current limit (65–455mA), programmable battery UVLO (2.4–3.1V), thermal regulation at 120°C, shipping-mode quiescent current of 4–5.5µA, and robust NTC-based temperature monitoring with cold/hot thresholds set via VDD-referenced voltage windows.

Technical Context

The MP2664 implements a direct power path architecture with two independently controlled internal FETs: a 300mΩ low-dropout regulator from IN to SYS and a 100mΩ battery FET from BATT to SYS. This decouples system load demand from battery charging, enabling priority-based power routing-system voltage (VSYS_REG = 4.65V typical) is maintained even with zero battery voltage, while charging proceeds only with surplus input capacity.

Its I²C interface (400kHz, 1.3V/0.4V logic thresholds) configures all critical parameters-including fast-charge current (8–535mA), pre-charge current (6–27mA), termination threshold (5–64mA), battery regulation voltage (3.6–4.545V), and thermal shutdown (150°C) with hysteresis-and reports real-time status via INT pin with interrupt-driven fault signaling (OVP, UVLO, NTC out-of-range, thermal fault).

Key Specifications

Pinout & Package

MP2664GG-0000-P is housed in a thermally enhanced QFN-10 package (2mm × 2mm, 0.5mm pitch) with exposed thermal pad. The package supports high-density PCB layouts and efficient heat dissipation in space-constrained portable designs.

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 BQ24296RGER, MP2664GG-0000-P offers superior thermal and battery protection integration (on-chip NTC windowing, 120°C regulation), while MAX77751DEWI+ adds unnecessary complexity and cost for basic USB-powered wearables-making MP2664 the optimal balance of integration, safety, and footprint for space-limited 5V-input applications.

Availability

MP2664GG-0000-P is available at Aetrix Electronics and suitable for smart wearables, fitness trackers, smartwatches, and wireless earbud charging cases requiring stable component supply, guaranteed RoHS/REACH compliance, and long-term lifecycle support.

Supply support for MP2664GG-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 over two decades of leadership in DC/DC converters, battery chargers, and motor drivers for portable and industrial applications.

The MP2664 belongs to MPS's single-cell Li-ion charger product line, designed specifically for ultra-compact, battery-powered consumer electronics where autonomous charging, power path intelligence, and thermal safety are non-negotiable system requirements.

FAQ

What is the maximum supported input voltage for MP2664GG-0000-P?

The absolute maximum input voltage is +13V, but the recommended operating range is 4.35V to 5.5V for USB-compatible sources. Input over-voltage protection triggers at 5.85–6.15V (rising edge), and recovery occurs after a 350mV hysteresis drop-ensuring robustness against transient spikes on shared USB ports without latch-up.

How does the MP2664 handle system load priority when input power is insufficient?

When system load demand exceeds available input current, the MP2664 automatically reduces charge current and supplements power from the battery via its 100mΩ BATT→SYS FET. This maintains regulated VSYS (4.65V) without interruption-even with a deeply discharged battery-by dynamically balancing input and battery contributions in real time.

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

Yes-the battery under-voltage lockout threshold is programmable from 2.4V to 3.1V (REG01h bits[2:0]) in 0.2V steps. When VBATT falls below this value, the BATT→SYS FET disconnects the battery from the system, preventing irreversible capacity loss and copper shunting in Li-ion cells caused by over-discharge below 2.5V.

What is the role of the INT pin beyond fault indication?

INT serves dual roles: (1) open-drain interrupt output signaling charge status (e.g., full, fault) to the host MCU, and (2) hardware-controlled battery disconnect-pulling INT low for ≥16s forces the BATT→SYS FET off, entering shipping mode; it auto-re-enables after ≥4s regardless of INT state, enabling simple factory reset or safe transport.

Does MP2664GG-0000-P support automatic recharge, and how is it configured?

Yes-auto-recharge is enabled by default and triggered when battery voltage drops 120–365mV below the full-charge regulation voltage (VBATT_REG), configurable via REG04h bit[0]. This ensures the battery remains at 100% SOC during long-term system standby without host MCU intervention or periodic polling.

How is thermal regulation implemented, and what happens above 120°C?

Thermal regulation activates at 120°C (programmable via REG06h bits[1:0]), reducing charge current to maintain junction temperature at that threshold. If temperature continues rising to 150°C, thermal shutdown engages with 20°C hysteresis-halting all operations until cooling occurs, then resuming normal function without requiring power-cycle reset.

Is an external blocking diode required for reverse-current protection?

No-MP2664GG-0000-P integrates bidirectional blocking capability: the IN→SYS LDO FET prevents reverse current from SYS to IN, and the BATT→SYS FET blocks reverse flow from SYS to BATT. This eliminates external diodes, saving board space and forward-voltage losses in both charging and discharging paths.