Monolithic Power Systems Inc. MP2720AGRH-0000-P

Overview

MP2720AGRH-0000-P from Monolithic Power Systems is a 2.2A, I²C-controlled buck battery charger IC for single-cell Li-ion/Li-polymer batteries, featuring NVDC power path management, 15mA configurable termination current, 26V input tolerance, and integrated boost converter for USB OTG. It delivers up to 98% charge efficiency at 1A and supports JEITA-compliant thermal regulation in wearable and portable power systems.

For engineers reviewing the MP2720AGRH-0000-P datasheet, MP2720AGRH-0000-P pinout, MP2720AGRH-0000-P application, or MP2720AGRH-0000-P equivalent, key selection considerations include I²C-configurable charge/termination currents (40mA–2.2A / 15–135mA), dual-role D+/D− USB BC1.2/non-standard adapter detection, shipping mode discharge current (8.5μA), and ±0.5% battery voltage regulation accuracy.

Technical Context

The MP2720A implements a fully integrated NVDC architecture with four internal MOSFETs (RB-FET, HS-FET, LS-FET, BATTFET) enabling seamless transition between input power and battery supply while maintaining regulated SYS rail. Its dual-loop control simultaneously manages input current limit (100mA–3.2A) and battery charge current (0–2.2A) via independent I²C registers.

Thermal safety is enforced through three-tiered protection: die temperature regulation (60°C–120°C), JEITA profile with dual NTC inputs (NTC1 + PG/NTC2), and hardware watchdog timer (40s). The boost converter operates up to 3A output with 5.08–5.22V regulation and OCP for capacitive loads up to 2mF.

Key Specifications

Pinout & Package

MP2720AGRH-0000-P is housed in a thermally enhanced QFN-22 package (2.5mm × 3.5mm, 0.5mm pitch) with exposed thermal pad. Pin 1 is marked by dot; pins 1 and 22 are NC and may be left open or tied to AGND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ25618RTWR and ISL9241IRZ-T, MP2720AGRH-0000-P uniquely combines 2.2A charging, integrated OTG boost, and dual NTC JEITA support in a 2.5×3.5mm package - making it optimal for space-constrained, thermally adaptive consumer electronics.

Availability

MP2720AGRH-0000-P is available at Aetrix Electronics and suitable for Bluetooth headphones, POS terminals, portable cameras, and wireless earbuds requiring stable component supply, guaranteed RoHS/REACH compliance, and full lifecycle support.

Supply support for MP2720AGRH-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-efficiency power management ICs for consumer, industrial, and automotive markets, with over 20 years of analog design expertise.

The MP2720A belongs to MPS's battery management product line, engineered specifically for compact, intelligent charging in USB-powered portable devices where thermal safety, firmware flexibility, and small footprint are critical.

FAQ

What is the minimum recommended termination current setting for MP2720AGRH-0000-P?

The datasheet specifies a configurable termination current range of 9–23mA for the 15mA setting, with 10–22mA typical. For wearable applications using ≤200mAh batteries, 15mA is the validated minimum that ensures full charge completion without excessive dwell time in CV phase - confirmed by JEITA-compliant charge profiling tests at 25°C ambient.

How does the MP2720A handle USB On-The-Go (OTG) power delivery?

The MP2720A's integrated boost converter delivers regulated 5.08–5.22V output with up to 3A current limit and built-in OCP. It supports large capacitive loads (up to 2mF), enabling direct connection to USB-C receptacles without external components. Output voltage and current limit are set via I²C registers, and the boost stage automatically disables when battery voltage drops below 3.0V to prevent deep discharge.

Can MP2720AGRH-0000-P operate without an external NTC thermistor?

Yes - the device functions in basic charging mode without NTC1 or PG/NTC2 connections. However, JEITA thermal regulation is disabled, and die temperature regulation (60–120°C) remains active. For UL/IEC 62368-1 compliance in consumer products, at least one NTC input is required to meet battery thermal safety mandates.

What is the purpose of the RST pin beyond shipping mode wake-up?

When VIN is absent, pulling RST low for 10ms (tRST) forces BATTFET shutdown for 330ms (tSYS_RST), then re-enables it - effectively resetting the SYS power rail during brownout or short-circuit recovery. This hardware-level reset avoids software lockup and restores system operation without host MCU intervention.

How does the NVDC power path improve system reliability compared to conventional chargers?

NVDC eliminates the "battery gap" during input removal by maintaining SYS rail from battery while simultaneously regulating battery charge. Unlike traditional architectures that drop SYS voltage during transition, MP2720A sustains 3.7–3.94V SYS output with <100mV droop - preventing MCU resets and ensuring uninterrupted operation in portable medical or data logging devices.

Is the 26V absolute maximum input rating sustainable during continuous operation?

No - the 26V rating is for transient overvoltage protection only (e.g., load dump). Continuous operation is limited to 3.9–6.3V per Recommended Operating Conditions. Exceeding 6.3V risks permanent damage to the IN-to-PGND junction, as confirmed by Absolute Maximum Ratings table and thermal derating curves in the datasheet.

Does MP2720AGRH-0000-P support I²C clock stretching?

Yes - the I²C interface supports clock stretching during register writes involving timing-critical operations (e.g., switching frequency change or JEITA window update). The internal state machine holds SCL low until configuration is latched, ensuring atomic parameter updates without bus contention.