Monolithic Power Systems Inc. MP2731GQC-0001-P

Overview

MP2731GQC-0001-P from Monolithic Power Systems is a 4.5A, I²C-controlled switch-mode battery charger IC for single-cell Li-ion/Li-polymer batteries, featuring NVDC power path management, USB OTG boost (up to 3.0A at 5V), and integrated ADC for voltage/current/temperature monitoring. It operates across 3.7V–16V input, delivers 92% charge efficiency at 3A, and supports automatic charge termination and auto-recharge.

For engineers reviewing the MP2731GQC-0001-P datasheet, MP2731GQC-0001-P pinout, MP2731GQC-0001-P application, or MP2731GQC-0001-P equivalent, this device is selected for portable systems requiring precise battery regulation, USB Type-C compatibility, thermal-safe charging with JEITA compliance, and system-level power path control without host firmware intervention.

Technical Context

The MP2731 implements a synchronous buck topology with monolithically integrated high-side (25mΩ) and low-side (25mΩ) MOSFETs, operating at 1.35MHz switching frequency. Its NVDC architecture enables instant-on operation with deeply discharged or absent batteries by decoupling SYS rail from BATT via an ideal diode mode (20mV forward drop).

USB OTG functionality is implemented as a regulated boost converter (4.8V–5.5V adjustable) with dedicated OTG pin control and hardware current limiting up to 3.0A. Battery discharge is managed through a 14mΩ BATFET supporting continuous 8.5A, while I²C register access enables full configuration of charge profiles, input limits, JEITA thresholds, and safety timers.

Key Specifications

Pinout & Package

MP2731GQC-0001-P is housed in a thermally enhanced QFN-26 package (3.5mm × 3.5mm, 0.5mm pitch) with exposed thermal pad. Pin numbering follows top-view layout per MPS datasheet Rev. 1.2.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar switch-mode battery charger applications.

Compared with BQ25618RTWR and ISL9238HRZ-T, MP2731GQC-0001-P uniquely combines 4.5A charging, integrated 3A OTG boost, USB DP/DM detection, and 14mΩ BATFET in a 3.5mm QFN-making it optimal for space-constrained consumer devices requiring full USB-C feature parity.

Availability

MP2731GQC-0001-P is available at Aetrix Electronics and suitable for smartphones, tablet PCs, and wireless cameras requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2731GQC-0001-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 centers in the US, China, and Taiwan.

The MP2731 belongs to MPS's battery management product line, engineered specifically for portable electronics demanding high-efficiency charging, USB-C compatibility, and autonomous thermal-safe operation without host CPU involvement.

FAQ

What input voltage range does MP2731GQC-0001-P support, and how does it handle overvoltage?

The MP2731GQC-0001-P accepts 3.7V to 16V input with sustained 22V absolute maximum rating. Input overvoltage protection activates at 6.3V (for 5V sources) or 17.2V (for high-voltage adapters), with 380mV hysteresis to prevent chatter. The internal 20mΩ reverse-blocking MOSFET isolates the battery during OVP events.

How does the NVDC power path enable instant-on functionality with a dead battery?

NVDC operation uses the SYS rail as the primary system power source. When the battery is absent or deeply discharged (<2.45V), the MP2731 powers SYS directly from IN via its ideal diode path (20mV forward drop), allowing the host SoC to boot immediately without waiting for battery recharge.

Can MP2731GQC-0001-P operate USB OTG without I²C commands?

No. OTG mode must be enabled via I²C register REG03h; the OTG pin only provides hardware suspend control. Default 5V output and current limit (0.5A–3.0A) are set by I²C bits, and boost operation halts if the OTG pin is pulled low during active discharge.

What thermal protections are implemented, and how are they configured?

The MP2731 includes thermal regulation (112°C trip), thermal shutdown (150°C), and JEITA-compliant NTC monitoring. JEITA thresholds (cold/cool/warm/hot) are set via I²C registers REG0Dh–REG0Fh using percentage-of-VNTC values; no external resistors are needed for basic operation.

Is the 14mΩ BATFET rated for continuous 8.5A discharge in all ambient conditions?

Yes-the 14mΩ R_DS(on) is specified at V_BATT = 3.8V and T_J = 125°C. With θ_JA = 48°C/W, 8.5A continuous discharge generates ~1.02W dissipation, raising junction temperature by ~49°C above ambient-well within the 125°C max operating limit at 76°C ambient.

Does MP2731GQC-0001-P require external components for USB type detection?

No. Integrated DP/DM comparators with programmable thresholds (1.7V/2.2V/2.4V/2.9V) and current sources (7–14µA) enable full USB BC1.2 and proprietary fast-charge protocol detection without external transceivers or pull-up resistors.

How is shipping mode activated, and what is the resulting battery leakage?

Shipping mode is triggered by holding the DISC pin low for ≥8 seconds (configurable via REG0Ah). In this state, the BATFET is disabled and system bias is minimized, reducing battery leakage to 13µA at 4.2V-enabling >12-month shelf life for pre-charged devices.