Monolithic Power Systems Inc. EV2626-R-00A

Overview

EV2626-R-00A from Monolithic Power Systems is an evaluation board for the MP2626 switch-mode battery charge and system power path management IC, supporting single-cell Li-ion/Li-Polymer batteries in portable devices. It implements dual-mode operation-charge mode (4.5–6V input, up to 2A charge current, 4.2/4.35V termination) and boost mode (2.5–4.5V battery input, 5V regulated output, 1.5A output limit)-with integrated thermal shutdown, input/battery overvoltage protection, NTC-based temperature monitoring, and programmable safety timer.

For engineers reviewing the EV2626-R-00A datasheet, EV2626-R-00A pinout, EV2626-R-00A application, or EV2626-R-00A equivalent, this board enables rapid validation of MP2626-based power architecture-including input-current limiting, adaptive input-voltage regulation, reverse-boost operation, and battery-reverse-leakage blocking-in sub-battery and power-bank designs requiring precise 5V system rail generation from a single cell.

Technical Context

The EV2626-R-00A implements full-system power path control using the MP2626 QFN24 IC, which integrates synchronous buck charging and synchronous boost conversion in one die. Its MODE pin selects between charge and boost modes, while REG, ILIM, FB, and TMR pins enable programmable input voltage regulation (4.75V default), 2.7A input current limit, 5V output regulation, and 2.8-hour charge timer (with 100nF CTMR).

Board-level design includes discrete NTC thermistor interface (RT1/RT2), precision current-sense resistor (RS1 = 50mΩ), and configurable feedback dividers (R1/R2 for 5V SYS, RH/RL for PWIN overvoltage threshold). Operating frequency is selectable at 600kHz or 1.2MHz via FREQ pin, and efficiency reaches up to 91% at 1A boost load.

Key Specifications

Availability

EV2626-R-00A is available at Aetrix Electronics and suitable for power-bank development, portable device sub-battery integration, and Li-ion system power-path validation requiring stable component supply, traceable evaluation hardware, and documented reference schematics.

Supply support for EV2626-R-00A 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-performance power management ICs, with expertise in DC/DC conversion, battery management, and motor drivers.

The MP2626 product line targets compact, high-efficiency single-cell battery systems requiring simultaneous charging and system power delivery-designed specifically for smartphones, tablets, wearables, and portable power banks.

FAQ

Is EV2626-R-00A a standalone power solution or a development tool?

EV2626-R-00A is strictly an evaluation board-not a production-ready module. It contains no onboard firmware or microcontroller; its sole purpose is to demonstrate and validate the MP2626 IC's dual-mode operation, safety features, and programmability in real-world conditions before integrating into custom PCBs.

What battery chemistries does this board support?

The board supports standard single-cell Li-ion and Li-Polymer batteries only, with fixed 4.2V or selectable 4.35V charge termination. It does not support LiFePO₄, NiMH, or multi-cell configurations. Battery voltage must remain within 2.5–4.5V during boost operation.

How is the 5V system output regulated in boost mode?

The 5V output is regulated via the MP2626's internal feedback loop using external resistors R1 (31.6kΩ) and R2 (10kΩ) on the FB pin. This sets V_SYS = 1.2V × (1 + R1/R2) = 5.0V, with ±1% tolerance under load and line variations per datasheet characterization.

Can the charge current be adjusted below 2A?

Yes-charge current is programmable from ~0.5A to 2A using the RISET resistor (28kΩ for 2A) and RS1 sense resistor (50mΩ default). Equation I_CHG = 2800 / R_ISET(kΩ) × 1/RS1(mΩ) allows precise scaling; reducing RISET to 56kΩ yields ~1A with same RS1.

Does the board include battery temperature monitoring hardware?

Yes-it includes a dedicated NTC thermistor interface (pins NTC and AGND) with two 10kΩ pull-up resistors (RT1, RT2) and space for a standard 10kΩ NTC (e.g., Murata NCP15XH103). The MP2626 uses this to suspend charging if battery temperature falls outside programmed thresholds.

What is the role of the MODE and EN jumpers?

MODE jumper selects operating mode: shorted to H enables boost mode (BATT → SYS); shorted to L enables charge mode (VIN → BATT). EN jumper enables/disables the entire IC: shorted to H activates the device; shorted to L forces shutdown. Both are independent logic controls per MP2626 pin definitions.