Monolithic Power Systems Inc. MP2720AGRH-0000-Z

Overview

MP2720AGRH-0000-Z from Monolithic Power Systems is a 2.2A I²C-controlled buck battery charger IC for single-cell Li-ion/Li-polymer batteries, featuring narrow-voltage DC (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 audio applications.

For engineers reviewing the MP2720AGRH-0000-Z datasheet, MP2720AGRH-0000-Z pinout, MP2720AGRH-0000-Z application, or MP2720AGRH-0000-Z equivalent, key selection considerations include NVDC path impedance, I²C-configurable charge/termination currents (15–2200mA), dual NTC inputs for JEITA profiling, shipping mode discharge current (8.5μA), and boost OCP/OTG load drive capability (up to 3A).

Technical Context

The MP2720A implements a fully integrated NVDC architecture with four internal MOSFETs: reverse-blocking FET (15mΩ), high-side switch (25mΩ), low-side switch (25mΩ), and battery FET (30mΩ), enabling seamless transition between input power and battery supply without system voltage droop. Its dual-mode operation-buck charging and boost source mode-is coordinated via register-controlled state machines with hardware safety timers.

Thermal and battery safety are enforced through independent analog comparators: die temperature regulation (60–120°C), dual NTC inputs (NTC1/PG-NTC2), BATT OVP (105% of VBATT_REG), and programmable pre-charge/termination thresholds. The I²C interface (400kHz) provides real-time access to 128 registers covering charge parameters, status flags (e.g., VIN_GD, CHG_DONE), and interrupt sources (INT pin pulse width = 256μs).

Key Specifications

Pinout & Package

MP2720AGRH-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 12 (BATTSNS) must connect directly to battery pack anode for accurate regulation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ25618RTWR and ISL9238HRZ-T7A, MP2720AGRH-0000-Z uniquely combines 2.2A charging, integrated 3A OTG boost, dual-NCT JEITA, and 8.5μA shipping mode-making it optimal for space-constrained, battery-sensitive portable audio and handheld computing designs.

Availability

MP2720AGRH-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 MP2720AGRH-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 over 20 years of expertise in DC-DC conversion, battery management, and motor drivers.

The MP2720A belongs to MPS's battery charger product line, engineered specifically for compact, intelligent portable devices demanding high integration, thermal safety, and USB ecosystem compatibility-including BC1.2, OTG, and JEITA standards.

FAQ

What is the minimum recommended input capacitance for MP2720AGRH-0000-Z?

A 1μF X7R ceramic capacitor is required between IN and PGND per the datasheet. This value stabilizes the input during BC1.2 detection and absorbs high-frequency switching noise from the buck stage. Larger values (e.g., 10μF) may be added in parallel for improved transient response, but the 1μF device must be placed closest to the IN pin with shortest possible trace length.

How does the MP2720A handle battery overvoltage protection?

The MP2720A monitors battery voltage continuously and triggers overvoltage protection when VBATT exceeds 105% of the programmed VBATT_REG value (e.g., >4.41V for 4.2V setting). Upon activation, it disables the charge FET and asserts a fault flag in the STATUS register. Recovery requires either a manual reset via RST pin or removal/reapplication of input power.

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

No-STAT/IB is a dual-function pin that operates in one mode at a time. When configured as STAT (default), it outputs open-drain pulses indicating charge progress or faults. When reconfigured via I²C register (IB_EN = 1), it becomes a current-source output proportional to battery current (1–22μA per mA), disabling the STAT function. Mode selection is mutually exclusive and non-overlapping.

What is the purpose of the VRNTC pin and how is it used?

VRNTC provides a regulated ~3.3V bias voltage (same as VCC) to power the external NTC thermistor network. It enables ratiometric measurement at NTC1 and PG/NTC2 pins, improving temperature accuracy across voltage and process variation. VRNTC is only active when the buck or boost converter is operating-ensuring NTC readings are synchronized with active charging/discharging states.

Does MP2720AGRH-0000-Z support USB PD input negotiation?

No-MP2720AGRH-0000-Z does not include USB Power Delivery (PD) PHY or protocol stack. It accepts fixed 5V input and supports BC1.2 and non-standard adapter detection only. For USB PD input, an external PD controller (e.g., CYPD3177) must be used upstream to regulate VIN to 5V before connecting to the MP2720A's IN pin.

How is shipping mode entered and exited?

Shipping mode is automatically entered after tSHIP_DLY (10–15s) when VIN = 0V and no activity is detected. To exit, drive RST low for tSHIPMODE (0.9–1.3s); this wakes the IC, enables VCC regulator, and restores I²C communication. No external power is required-the battery alone powers the wake-up sequence.

What thermal derating applies above 85°C ambient?

The MP2720A employs die temperature regulation starting at user-configured TREG (60–120°C). Above the set threshold, it linearly reduces charge current to maintain junction temperature. At 125°C ambient (θJA = 50°C/W), power dissipation must stay below 1.5W to avoid thermal shutdown-achieved via reduced ICC, lower fSW, or increased PCB copper area under the thermal pad.