Monolithic Power Systems Inc. MP2626GR-P

Overview

MP2626GR-P from Monolithic Power Systems is a USB-compliant, bi-directional switch-mode Li-ion battery charger and USB-OTG boost regulator for single-cell 4.2V/4.35V batteries. It delivers up to 2A programmable charge current, supports input-current limiting (400–2200mA), integrates NTC-based battery temperature monitoring, and provides 5V boost output with 1.12A programmable current limit and 91% efficiency at 1A - used in portable power banks and smartphone auxiliary charging systems.

For engineers reviewing the MP2626GR-P datasheet, MP2626GR-P pinout, MP2626GR-P application, or MP2626GR-P equivalent, key selection considerations include its dual-mode operation (charge/boost), programmable full-charge voltage (4.2V or 4.35V), thermal regulation at 120°C, input-voltage regulation loop, and integrated safety features including battery over-voltage protection, trickle-charge timeout, and short-circuit protected boost output.

Technical Context

The MP2626GR-P implements a synchronous buck-boost architecture with independent control loops for input current, input voltage, battery charge current, battery voltage, and die temperature. Its MODE pin selects between charge mode (EN-controlled) and boost mode (MODE = HIGH), with automatic transition logic based on VIN presence and ACOK status.

In charge mode, it executes three-phase charging (trickle → constant current → constant voltage) with auto-recharge triggered at 4.015V (VB floating) or 4.157V (VB grounded). In boost mode, it regulates 5V output using FB feedback with 1.2V reference, includes output current limiting via OLIM resistor, and disables when VBATT drops below 2.5V.

Key Specifications

Pinout & Package

MP2626GR-P is housed in a thermally enhanced QFN-24 package (4mm × 4mm, 0.5mm pitch) with exposed PGND pad for efficient heat dissipation and low-inductance grounding.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-mode Li-ion charging and USB-OTG boost applications.

Compared with BQ25895RTWR and IP2326, MP2626GR-P uniquely combines autonomous input-voltage regulation, 120°C thermal foldback, and dual-voltage (4.2V/4.35V) battery termination in a single QFN-24 package - making it optimal for self-contained, safety-certifiable portable power designs without host processor dependency.

Availability

MP2626GR-P is available at Aetrix Electronics and suitable for portable power banks, smartphone auxiliary chargers, USB-C accessory hubs, and industrial handheld scanners requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for MP2626GR-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 analog semiconductor company specializing in high-efficiency DC-DC converters, battery management ICs, and motor drivers - headquartered in Kirkland, WA, with global design and support centers.

The MP2626 belongs to MPS's USB-compliant battery management product line, engineered specifically for compact, dual-role portable electronics that require simultaneous charging and USB-OTG boost functionality without external controllers.

FAQ

What is the function of the VB pin on MP2626GR-P?

The VB pin selects the battery full-charge voltage: left floating or pulled HIGH sets 4.2V termination (standard Li-ion), while connecting to GND selects 4.35V (Li-polymer). This configuration is latched at power-up and determines the CV threshold used by the internal voltage loop - accuracy is ±0.5% at 25°C per datasheet Table 1.

How does MP2626GR-P handle input over-current events?

It triggers input over-current protection (IIN(OCP) = 3A) with 120µs blanking time and 100ms recovery delay. During OCP, the IN-to-PMID pass-through MOSFET turns off, halting power transfer until VIN recovers and the recovery timer expires - preventing damage to USB source ports during cable shorts or surge events.

Can MP2626GR-P operate without an external NTC thermistor?

Yes - the NTC pin is optional. If left unconnected, battery temperature monitoring is disabled and thermal safety relies solely on die-junction sensing (120°C regulation, 150°C shutdown). However, UL/IEC 62133 certification requires external NTC for charge enable/disable control, so omission invalidates safety compliance in certified products.

What is the minimum input voltage required for boost mode operation?

Boost mode requires VBATT ≥ 2.9V before activation and shuts down automatically if VBATT falls below 2.5V during operation. The IC draws no current from VIN in boost mode - all energy comes from the battery - and supports input voltage ranges from 4.2V to 6V on PMID when enabled.

How is charge termination determined in MP2626GR-P?

Termination occurs when battery voltage reaches the programmed full-charge threshold (4.2V or 4.35V) and charge current decays to 2.5–17.5% of the CC value (set by ISET), verified by the internal IBF comparator. A programmable timer (via CTMR capacitor) provides backup cutoff after 400 minutes if termination conditions aren't met.

Does MP2626GR-P support USB Battery Charging (BC) 1.2 specification?

No - it does not implement BC1.2 D+/D− detection. Instead, it uses PWIN pin voltage sensing (0.8V/1.15V thresholds) to detect valid USB input presence and REG pin feedback to regulate input voltage - ensuring compatibility with standard USB 2.0 ports and wall adapters without enumeration overhead.

What is the purpose of the REG pin?

The REG pin feeds the input-voltage regulation loop. An external resistor divider from VIN to GND sets the regulation threshold (e.g., 4.7V); when VIN sags to this level, the IC reduces charge current to maintain stable input voltage - protecting weak USB hosts and preventing brownout in multi-load systems.