Monolithic Power Systems Inc. MP2636GR-P

Overview

MP2636GR-P from Monolithic Power Systems is a 3.0A single-cell Li-ion/Li-Polymer switch-mode battery charger with integrated power path management (PPM) and 3.0A system boost capability. It supports three-phase charging (trickle/constant-current/constant-voltage), programmable 4.2V/4.3V/4.35V charge voltage (±0.5%), real-time battery current monitoring via IB pin, and thermal regulation at 120°C. It enables seamless transition between charge and boost modes in portable power-bank applications.

For engineers reviewing the MP2636GR-P datasheet, MP2636GR-P pinout, MP2636GR-P application, or MP2636GR-P equivalent, key selection considerations include input current limit programming (ILIM), charge current setting (ISET), boost output current limit (OLIM), battery voltage programmability (VB), and dual-mode status indication (CHG/BOOST pins).

Technical Context

The MP2636GR-P implements a dual-path architecture with independent high-side PMOS (25 mΩ R_DS(on)) and low-side NMOS (25 mΩ R_DS(on)) for pass-through, charging, and reverse-boost operation. Its control logic uses analog feedback loops for input voltage regulation (V_REG = 1.2 V), battery voltage regulation (±0.5% accuracy), and boost output regulation (4.2–6 V range, 1.2 V FB reference).

Mode transitions are governed by PWIN (input presence detection), MODE pin (boost enable), and EN (charge enable), with automatic fallback to sleep mode when VIN < 2 V or during overtemperature (150°C shutdown). Charge termination occurs at 150 mA residual current, and auto-recharge triggers at 4.02–4.195 V depending on VB configuration.

Key Specifications

Pinout & Package

MP2636GR-P is housed in a thermally enhanced QFN-30 package (4 mm × 4 mm, 0.5 mm pitch) with exposed thermal pad (PGND-connected) and wettable flank leads for automated optical inspection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ25611DRTWR and IP5306, MP2636GR-P uniquely integrates bidirectional power path management, programmable charge voltage with 0.5% accuracy, and analog battery current monitoring-enabling compact, high-fidelity battery systems without external support components.

Availability

MP2636GR-P is available at Aetrix Electronics and suitable for power-bank development, portable monitor design, smartphone accessory manufacturing, and wireless earbud case production requiring stable component supply and long-term lifecycle support.

Supply support for MP2636GR-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 analog and power ICs, with core expertise in DC/DC conversion, battery management, and motor control.

The MP2636 product line targets portable electronics requiring integrated charge-and-boost functionality, emphasizing power path intelligence, thermal robustness, and minimal external component count for space-constrained designs.

FAQ

What is the function of the VB pin on MP2636GR-P?

The VB pin selects the battery full-charge voltage: connecting to GND sets 4.3 V, leaving it floating selects 4.35 V, and tying to VCC configures 4.2 V. This 0.5% accurate programmability allows optimization for different Li-ion chemistries and aging profiles without changing external resistors.

How does MP2636GR-P handle input overvoltage conditions?

MP2636GR-P includes input overvoltage protection (OVP) that triggers at VIN > 6 V, forcing the device into sleep mode. The absolute maximum rating is +20 V, but sustained operation above 6 V is prohibited; OVP is internal and does not require external components.

Can MP2636GR-P operate without an NTC thermistor?

Yes-NTC connection is optional. If the NTC pin is left unconnected, temperature monitoring is disabled and thermal regulation remains active via die-sensing. The device still enforces 120°C thermal regulation and 150°C shutdown regardless of NTC status.

What is the purpose of the ILIM pin, and how is it configured?

The ILIM pin programs the input current limit during charge mode using a resistor to PGND. Values from 13 kΩ (3.27 A) to 86.6 kΩ (450 mA) set the limit, enabling dynamic allocation of input power between battery charging and SYS load delivery.

Does MP2636GR-P support trickle charging for deeply discharged batteries?

Yes-it implements a dedicated trickle-charge phase below 2.91–3.145 V (depending on VB state), delivering up to 200 mA until the battery reaches the threshold. This prevents lithium plating and enables safe recovery of cells down to 2.5 V.

How is boost-mode output voltage regulated?

Boost-mode output voltage is regulated via the FB pin using an external resistor divider from SYS to PGND. The internal reference is 1.2 V, allowing SYS output to be set between 4.2 V and 6.0 V. Output overvoltage protection triggers at 5.8–6.2 V to safeguard downstream loads.

What is the minimum recommended output capacitance on the SYS rail?

A minimum of 44 µF total ceramic capacitance is required on the SYS rail, implemented as ≥22 µF placed close to pins 3/20/29 and PGND. This ensures stability during boost-mode transient load steps and meets EMI requirements per the datasheet layout guidelines.