Monolithic Power Systems Inc. MP2720GRH-0000-Z

Overview

MP2720GRH-0000-Z from Monolithic Power Systems is a 2.5A, I²C-controlled, single-cell Li-ion/Li-polymer buck charger IC with narrow-voltage DC (NVDC) power path architecture, integrated 15mΩ battery MOSFET, configurable 750kHz–1.5MHz switching frequency, and dual-role boost converter supporting USB OTG up to 3A. It delivers ±0.5% battery voltage regulation and operates in portable audio devices requiring fast, safe, and thermally adaptive charging.

For engineers reviewing the MP2720GRH-0000-Z datasheet, MP2720GRH-0000-Z pinout, MP2720GRH-0000-Z application, or MP2720GRH-0000-Z equivalent, key selection considerations include NVDC path impedance, JEITA temperature window configurability, shipping mode discharge current (8.5μA), I²C register lockability, and dual NTC input support for wearable-grade thermal management.

Technical Context

The MP2720 implements a monolithic NVDC architecture with integrated high-side (25mΩ), low-side (25mΩ), reverse-blocking (15mΩ), and battery (14mΩ) MOSFETs - enabling seamless transition between input power and battery supply without system brownout. Its dual NTC inputs (NTC1/NTC2) feed independent JEITA profile logic with user-defined cold/cool/warm/hot thresholds and hysteresis.

Charge control is fully I²C-configurable: charge current (80mA–2.5A), input current limit (100mA–3.2A), termination current (30mA–120mA), and die temperature regulation (60°C–120°C) are all programmable via 8-bit registers. The boost converter supports 5V–5.35V output with OCP, large-capacitive-load drive (up to 2mF), and dynamic load step response optimized for POS terminals and Bluetooth speakers.

Key Specifications

Pinout & Package

MP2720GRH-0000-Z is housed in a thermally enhanced QFN-22 package (2.5mm × 3.5mm, 0.5mm pitch) with exposed thermal pad. Pin 5 (PGND) and Pin 18 (AGND) must be shorted on PCB; Pin 19 (VCC) requires a 4.7μF ceramic capacitor to AGND; Pin 3 (PMID) requires ≥10μF ceramic bypass close to the IC.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar single-cell I²C-controlled buck charger applications.

Compared with BQ25618RTWR and IP2326, MP2720GRH-0000-Z uniquely combines 2.5A programmable charging, dual NTC JEITA profiling, integrated 3A OTG boost, and 8.5μA shipping mode - making it the only option meeting full IEC 62368-1 thermal safety and USB-C accessory interoperability requirements in premium portable audio and imaging devices.

Availability

MP2720GRH-0000-Z is available at Aetrix Electronics and suitable for Bluetooth headphones, point-of-sale terminals, portable cameras, and Bluetooth speakers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2720GRH-0000-Z 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, and global manufacturing partnerships.

The MP2720 belongs to MPS's battery management product line, engineered specifically for compact, thermally constrained portable electronics requiring integrated NVDC architecture, I²C configurability, and USB OTG functionality - targeting next-generation wearables and smart peripherals.

FAQ

What is the purpose of the VRNTC pin?

The VRNTC pin provides a regulated voltage reference (equal to VCC when active) to bias external NTC thermistors. It enables accurate temperature measurement across NTC1 and NTC2 inputs by powering resistor dividers, supporting JEITA-compliant thermal zone detection with ±1.4% hysteresis per threshold.

How does the MP2720 handle input source detection without external components?

The MP2720 uses its D+ and D- pins to perform USB Battery Charging Specification 1.2 (BC1.2) detection and non-standard adapter identification internally. It applies programmable voltage windows (e.g., 1.2V, 2.0V, 2.7V) to D+/D- and measures resulting currents - eliminating need for external comparators or resistive networks.

Can the STAT/IB pin be used simultaneously for status indication and current monitoring?

No - STAT/IB is a dual-function pin operating in mutually exclusive modes. When configured as STAT, it outputs open-drain charge status pulses; when configured as IB, it sources a current proportional to battery current (1–22μA/mA). Mode selection is controlled via I²C register bit IB_EN.

What is the minimum recommended inductor value and DCR for optimal efficiency?

MPS specifies a 1μH inductor with ≤12mΩ DCR for nominal operation. Using this value achieves >92% peak efficiency at 1.5A charge current and maintains thermal rise below 25°C at TA = 25°C. Lower DCR improves efficiency but increases cost and size; higher DCR degrades light-load regulation and raises junction temperature.

Does the MP2720 support battery voltage compensation for PCB trace resistance?

Yes - the BATTSNS pin enables true 4-wire remote sensing. By connecting BATTSNS directly to the battery pack's positive terminal (separate from BATT), the IC compensates for voltage drop across PCB traces and connectors, ensuring ±0.5% regulation accuracy at the cell regardless of layout parasitics.

How is shipping mode exited after assembly or field deployment?

Shipping mode is exited by pulling the RST pin low for 1.1 seconds (tSHIPMODE) while VIN = 0V. This resets the BATTFET and enables SYS rail output. The command can be issued via microcontroller GPIO or manual test fixture - no reprogramming or I²C communication required.

What protection features activate during over-temperature conditions?

At die temperature ≥TJ_REG (configurable 60°C–120°C), the MP2720 reduces charge current linearly to maintain TJ at setpoint. If temperature exceeds 150°C (TJ_SHDN), thermal shutdown disables all power stages. Recovery requires cooling below 120°C (30°C hysteresis) and either VIN removal/reapplication or RST assertion.