Monolithic Power Systems Inc. MP2759AGQ-0000-P

Overview

MP2759AGQ-0000-P from Monolithic Power Systems is a 36V input, 3A switching battery charger IC supporting 1S–6S Li-ion/Li-polymer packs with programmable cell count (via CELL pin), configurable regulation voltage (3.6V–4.4V/cell), and JEITA-compliant narrow NTC window thermal management. It integrates power path management, input current/voltage limiting, and robust safety features including OVP, thermal shutdown, and 20-hour charging safety timer - deployed in industrial medical equipment and portable power tools.

For engineers reviewing the MP2759AGQ-0000-P datasheet, MP2759AGQ-0000-P pinout, MP2759AGQ-0000-P application, or MP2759AGQ-0000-P equivalent, key selection criteria include its QFN-19 (3mm×3mm) package, 0.5% battery voltage regulation accuracy, integrated reverse-blocking MOSFET, four-phase charge algorithm (trickle/pre/CC/CV), and narrow NTC threshold configuration for precise JEITA thermal compliance.

Technical Context

The MP2759AGQ-0000-P implements a synchronous buck topology with integrated high-side (RON = 43 mΩ), low-side (RON = 63 mΩ), and reverse-blocking (RON = 43 mΩ) MOSFETs, operating at 450 kHz or 700 kHz switch frequency. Its dual-loop control architecture simultaneously regulates battery voltage (VBATT_REG), charge current (ICC), input current (IIN_LIM), and input voltage (VIN_MIN) using dedicated analog comparators and error amplifiers.

Cell count (1S–6S) and per-cell regulation voltage (3.6V–4.4V) are configured via resistor-divider networks on CELL and VB pins, scaling all thresholds (e.g., VBATT_TC, VBATT_PRE, VRECH) linearly. The NTC interface monitors voltage ratios against VCC to enforce JEITA zones - cold (VCOLD), cool (VCOOL), warm (VWARM), hot (VHOT) - with automatic current reduction or voltage derating within specified bands.

Key Specifications

Pinout & Package

MP2759AGQ-0000-P is housed in a thermally enhanced QFN-19 (3mm × 3mm) package with exposed thermal pad. Pin functions are validated per MPS MP2759A Rev. 1.0 datasheet (pp. 4–5).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ25792RTWR and LTC4162EUFD#PBF, MP2759AGQ-0000-P delivers superior voltage regulation accuracy (0.5% vs. 1.5%/typical), integrated reverse-blocking FET (reducing component count), and purpose-built narrow NTC JEITA thresholds - making it optimal for industrial and medical applications requiring certified thermal safety and minimal external components.

Availability

MP2759AGQ-0000-P is available at Aetrix Electronics and suitable for industrial medical equipment, power tools, and robot vacuum cleaners requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2759AGQ-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-performance power management ICs, with over two decades of expertise in DC/DC conversion, battery charging, and motor control solutions.

The MP2759A belongs to MPS's high-voltage switching charger product line, designed specifically for rugged industrial and portable applications requiring wide-input operation, multi-cell flexibility, and certified thermal safety - not general-purpose consumer charging.

FAQ

What battery chemistries and configurations does MP2759AGQ-0000-P support?

The MP2759AGQ-0000-P supports 1S–6S series-connected Li-ion and Li-polymer batteries with user-selectable per-cell regulation voltages: 3.6V, 4.0V, 4.1V, 4.15V, 4.2V, 4.35V, or 4.4V. Cell count is set via resistor-divider on the CELL pin; regulation voltage is configured via the VB pin. It does not support NiMH, lead-acid, or LiFePO₄ chemistries.

How is the narrow NTC window implemented for JEITA compliance?

The MP2759AGQ-0000-P implements JEITA compliance by measuring the NTC pin voltage as a percentage of VCC (5V). Thresholds are fixed: VCOLD = 74% VVCC, VCOOL = 66%, VWARM = 48%, VHOT = 44%, each with 1.4% hysteresis. Charging is suspended outside the VHOT–VCOLD range; current is halved in cool zone and regulation voltage reduced by 100mV/cell in warm zone.

Can MP2759AGQ-0000-P operate without an external NTC thermistor?

No. The NTC pin is mandatory for safe operation: charging is disabled if the NTC voltage falls outside the VHOT–VCOLD window (44–74% of VCC). The device does not support NTC bypass or open-circuit fallback modes. A 103AT thermistor (β = 3435) with matching pull-up resistor is recommended per the datasheet.

What is the function of the VLIM pin beyond input voltage regulation?

The VLIM pin serves dual roles: as feedback input for the input voltage minimum regulation loop (triggering current reduction when VLIM < 1.2V), and as a hard disable input (charging stops when VLIM < 0.8V). This enables both adaptive input sag compensation and explicit system-level shutdown control via MCU GPIO or comparator output.

Does MP2759AGQ-0000-P support USB PD or proprietary fast-charge protocols?

No. MP2759AGQ-0000-P is a standalone analog charger IC with fixed-input voltage and current regulation. It does not include USB PD PHY, BC1.2 detection, or proprietary protocol stacks (e.g., Qualcomm Quick Charge). Input voltage must be provided by a compatible DC source; communication is limited to STAT and ACOK status pins.

How is the 20-hour charging safety timer reset?

The 20-hour charging safety timer resets automatically at the start of any new charge cycle - triggered when input voltage exceeds UVLO (3.6V) and satisfies VIN > VBATT + VHDRM (2V). It also resets during auto-recharge events and is halted during input removal or fault conditions such as OVP or thermal shutdown.

What thermal design guidance applies to the QFN-19 package?

The QFN-19 (3mm × 3mm) package requires connection of the exposed thermal pad to a minimum 100mm² copper pour with ≥4 thermal vias (0.3mm diameter) to inner ground planes. With this layout, θJA is 50°C/W, enabling 2.5W continuous dissipation at TA = 25°C. Derate linearly above 25°C ambient per the datasheet's PD(MAX) formula.