Monolithic Power Systems Inc. MP2695GQ-0000-Z

Overview

MP2695GQ-0000-Z from Monolithic Power Systems is a highly integrated I²C-controlled switching battery charger for single-cell Li-ion/Li-polymer batteries, featuring programmable 500mA–3.6A charge current, 3.6V–4.45V regulation voltage (±0.5% accuracy), and JEITA-compliant temperature profiling. It operates from 4.0V–11V input, integrates pre-charge/CC/CV phases, and delivers real-time battery current monitoring via analog IB output-used in portable Bluetooth speakers and mobile accessories requiring adaptive thermal-aware charging.

For engineers reviewing the MP2695GQ-0000-Z datasheet, MP2695GQ-0000-Z pinout, MP2695GQ-0000-Z application, or MP2695GQ-0000-Z equivalent, key selection criteria include I²C-programmable JEITA thresholds, ±10% input current limit accuracy, ultra-low 25μA idle discharge, and QFN-21 (3mm×3mm) thermal performance with θJA = 50°C/W.

Technical Context

The MP2695 implements a synchronous buck-boost topology with integrated high-side (15mΩ), low-side (14mΩ), and power-path (25mΩ) MOSFETs, enabling efficient CC/CV charging across 4.0V–11V input while maintaining precise battery voltage regulation. Its dual-loop power management dynamically enforces both input current limit (100mA–3A) and minimum input voltage (4.5V–4.76V) to prevent adapter overload.

JEITA compliance is implemented via four configurable NTC voltage thresholds (VCOLD, VCOOL, VWARM, VHOT) referenced to VRNTC (3.5V), allowing independent scaling of charge current at cool temps and charge voltage at warm/hot temps-fully controlled through I²C registers without host firmware intervention.

Key Specifications

Pinout & Package

MP2695GQ-0000-Z is housed in a thermally enhanced 21-pin QFN package (3mm × 3mm, 0.4mm pitch) with exposed thermal pad. The package supports high-density PCB layouts and provides low θJA (50°C/W) for continuous 3A charging in compact 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-Z uniquely combines I²C-programmable JEITA thresholds, integrated VRNTC reference, and analog IB current monitor in a 3mm×3mm footprint-delivering full autonomous thermal-aware charging without host MCU overhead or external signal conditioning.

Availability

MP2695GQ-0000-Z is available at Aetrix Electronics and suitable for Bluetooth speaker charging, USB-C power bank design, industrial handheld scanner battery management, and TWS earbud case integration requiring stable component supply, JEITA compliance, and compact QFN packaging.

Supply support for MP2695GQ-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 expertise in DC/DC converters, battery chargers, and motor drivers for portable, industrial, and automotive markets.

The MP2695 belongs to MPS's high-integration battery management product line, designed specifically for space-constrained, thermally sensitive portable electronics requiring autonomous, I²C-configurable, JEITA-compliant charging without external support components.

FAQ

What is the function of the VRNTC pin on MP2695GQ-0000-Z?

The VRNTC pin supplies a precision 3.5V reference voltage to bias the external NTC thermistor network. This enables accurate measurement of battery temperature by comparing the NTC voltage against four programmable thresholds (VCOLD, VCOOL, VWARM, VHOT), forming the basis for JEITA-compliant charge current and voltage derating without host processor involvement.

Can MP2695GQ-0000-Z operate without an I²C host controller?

Yes. MP2695GQ-0000-Z supports autonomous charging using factory-default register values: 4.2V regulation voltage, 1A charge current, 4.65V input voltage limit, and JEITA enabled with default thresholds. I²C is optional for customization-basic CC/CV charging, safety timer, and thermal protection function independently.

How does the IB pin provide battery current information?

The IB pin outputs an analog voltage proportional to battery charge current: V_IB = I_CHG × 0.35V/A (typ.) when using a 10mΩ sense resistor. Scaling RS1 changes the gain linearly-for example, a 20mΩ resistor yields 0.7V/A. This eliminates need for external current-sense amplifiers in system-level current monitoring.

What happens during input voltage droop below VIN_MIN?

When input voltage falls below the programmed VIN_MIN threshold (e.g., 4.65V), the MP2695 enters input voltage-based power management (VINPPM) mode: it reduces charge current to maintain input voltage above the threshold. An interrupt pulse is generated on the INT pin, and the status register flags VINPPM condition for host awareness.

Is thermal shutdown recovery automatic?

Yes. When junction temperature exceeds 150°C, the MP2695 halts switching and enters thermal shutdown. Once die temperature cools to approximately 120°C (30°C hysteresis), the device automatically resumes normal operation without requiring reset or I²C command-ensuring robustness in thermally constrained enclosures.

Does MP2695GQ-0000-Z support battery preconditioning for deeply discharged cells?

Yes. The IC implements a dedicated pre-charge phase for batteries below 2.9V, delivering a fixed 150mA or 350mA (configurable via IPRE[1:0]) until VBATT rises above 3.0V. This safely conditions Li-ion cells with voltage below 3.0V before initiating constant-current charging, preventing damage from excessive current injection.

What is the role of the SMID pin?

The SMID pin connects to the common drain node of the internal power-path MOSFETs (Q1 and Q2). It must be shorted to PMID on the PCB to ensure proper gate drive and current sharing between the input and battery paths-critical for reliable power-path operation and reverse current blocking.