Monolithic Power Systems Inc. MP2695GQ-0000-P

Overview

MP2695GQ-0000-P from Monolithic Power Systems is a highly integrated I²C-controlled switching battery charger for single-cell Li-ion/Li-polymer batteries, delivering programmable 500mA–3.6A charge current, ±0.5% charge voltage regulation (3.6V–4.45V), and JEITA-compliant temperature-aware charging with NTC monitoring. It integrates pre-charge, constant-current, and constant-voltage phases and supports input power path management in portable Bluetooth speakers and mobile devices.

For engineers reviewing the MP2695GQ-0000-P datasheet, MP2695GQ-0000-P pinout, MP2695GQ-0000-P application, or MP2695GQ-0000-P equivalent, key selection criteria include I²C-configurable JEITA thresholds, ultra-low 25μA battery discharge in idle mode, analog IB pin for real-time current monitoring, and QFN-21 (3mm×3mm) thermal performance with θJA = 50°C/W.

Technical Context

The MP2695 implements a synchronous buck-boost architecture with integrated high-side (15mΩ), low-side (14mΩ), and power-path (25mΩ) MOSFETs, enabling efficient CC/CV charging across 4.0V–11V input. Its dual-loop regulation simultaneously enforces input current limit (±10% accuracy) and minimum input voltage (VIN_MIN) to maximize adapter power tracking without brownout.

JEITA compliance is implemented via four programmable NTC voltage thresholds (VCOLD, VCOOL, VWARM, VHOT) referenced to VRNTC (3.5V), with independent current-scaling (JEITA_ISET) and voltage-reduction (JEITA_VSET) modes. All status, faults, and register settings-including safety timer, OVP, and thermal shutdown-are accessible and controllable over standard/fast-mode I²C (up to 400kHz).

Key Specifications

Pinout & Package

MP2695GQ-0000-P is housed in a thermally enhanced 21-pin QFN package (3mm × 3mm, 0.5mm pitch) with exposed thermal pad. The package supports high-density layout and efficient heat dissipation in space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar switching battery charger applications.

Compared with BQ25618RTWR and ISL9238HRZ-T, MP2695GQ-0000-P uniquely combines 3.6A programmable charge current, fully register-configurable JEITA voltage/current scaling, and integrated analog IB monitoring in a 3mm×3mm footprint-making it optimal for compact, temperature-critical single-cell Li-ion systems requiring host-controlled adaptability.

Availability

MP2695GQ-0000-P is available at Aetrix Electronics and suitable for Bluetooth speakers, USB-C power banks, industrial handheld scanners, and wireless earbud charging cases requiring stable component supply, JEITA-compliant thermal safety, and I²C-based runtime configurability.

Supply support for MP2695GQ-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 DC/DC converters, battery management ICs, and motor drivers for portable, automotive, and industrial markets.

The MP2695 belongs to MPS's high-integration battery charger product line, designed specifically for space-constrained, thermally sensitive single-cell Li-ion applications requiring programmable JEITA compliance and host-controlled power path management.

FAQ

What is the function of the IB pin on MP2695GQ-0000-P?

The IB pin provides an analog voltage output proportional to battery charge current: V_IB = I_CHG × 0.36V (with 10mΩ sense resistor). It enables real-time current telemetry without external amplification or ADC conversion, simplifying host firmware current monitoring and logging.

How does MP2695GQ-0000-P implement JEITA temperature profiling?

It uses four programmable NTC voltage thresholds (VCOLD, VCOOL, VWARM, VHOT) referenced to its internal 3.5V VRNTC output. JEITA_ISET controls current reduction in cool/cold zones; JEITA_VSET reduces charge voltage in warm/hot zones-both configurable via I²C registers without external components.

Can MP2695GQ-0000-P operate without I²C communication?

Yes. It boots with factory-default register values (e.g., 3A charge current, 4.2V regulation, JEITA enabled) and executes full autonomous charging-including pre-charge, CC, CV, termination, and auto-recharge-without host intervention.

What is the purpose of the SMID pin?

SMID connects to the common drain node of the internal power-path FETs (Q1 and Q2). It must be shorted to PMID on the PCB to enable the integrated dual-FET architecture that manages input-to-battery power flow and reverse current blocking.

Does MP2695GQ-0000-P support input current limiting below 500mA?

No. The minimum programmable input current limit is 100mA (per IINLIM[2:0] = 000), and the minimum charge current is 150mA (IPRE[1:0] = 00). For sub-100mA applications, external current limiting or alternative ICs are required.

How is thermal shutdown managed during continuous high-power operation?

Internal die temperature is monitored continuously. At 150°C, switching halts and INT pulses; recovery occurs automatically at ~120°C. The QFN-21 package's θJA = 50°C/W allows sustained 3A charging with ≤25°C ambient rise on a 4-layer PCB with thermal pad soldered.

What happens if the NTC thermistor fails open or shorted?

If NTC is open, NTC_FAULT[2:0] = 100 triggers an INT pulse and disables charging when NTC_STOP = 1. If shorted, NTC_FAULT[2:0] = 011 generates INT but charging continues unless JEITA_DIS = 0 and thresholds are violated.