Monolithic Power Systems Inc. EV2633-R-01A

Overview

EV2633-R-01A from Monolithic Power Systems is an evaluation board for the MP2633 switch-mode battery charge and system power path management IC, designed for single-cell Li-ion/Li-Polymer systems. It supports dual-mode operation-charge mode (up to 1.5A) with programmable 3.6V/4.2V termination and boost mode (up to 1A at 5V SYS output)-with integrated input over-voltage protection, thermal shutdown, battery temperature monitoring, and programmable charge timer.

For engineers reviewing the EV2633-R-01A datasheet, EV2633-R-01A pinout, EV2633-R-01A application setup, or EV2633-R-01A equivalent evaluation platforms, this board enables rapid validation of MP2633-based power architecture in portable power-bank and sub-battery systems requiring seamless input-to-battery and battery-to-system power routing.

Technical Context

The EV2633-R-01A implements a complete reference design for the MP2633 IC, featuring QFN24 (4×4 mm) packaging and discrete passive layout optimized for low-noise switching performance. Its dual-path architecture separates charging (VIN→BATT) and boosting (BATT→SYS), with independent regulation loops for input current limit (2A), charge current (1.5A), and SYS output (5V ±1%).

Operation is controlled via five configurable pins: MODE (charge/boost selection), EN (enable), PWIN (input over-voltage detection), REG (input voltage regulation feedback), and ILIM (input current limit programming). All critical thresholds-including 4.2V/3.6V charge full voltage, 1.15V PWIN trip, and 1.2V REG reference-are resistor-programmable using on-board 0603/1206 footprints.

Key Specifications

Availability

EV2633-R-01A is available at Aetrix Electronics and suitable for power-bank development, portable medical device prototyping, and handheld industrial scanner design requiring stable component supply and validated reference hardware.

Supply support for EV2633-R-01A 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 a focus on energy-efficient DC-DC conversion, battery management, and motor control solutions.

The EV2633-R-01A belongs to MPS's evaluation board product line, developed specifically to accelerate adoption of the MP2633 power path manager for portable applications demanding flexible, safe, and efficient single-cell battery integration.

FAQ

What is the primary function of the EV2633-R-01A?

The EV2633-R-01A is an evaluation board-not a standalone IC-that demonstrates the MP2633 battery charge and system power path management IC. It enables engineers to validate dual-mode operation (charge and boost), configure protection thresholds, and measure real-world efficiency, timing, and regulation behavior before integrating MP2633 into custom PCBs.

How do I configure the board for charge mode versus boost mode?

Charge mode is enabled by setting the MODE jumper to "L" and EN to "H"; boost mode requires MODE = "H" and EN = "L". The board includes labeled test points and silkscreen indicators (LED1/LED2) to confirm active mode. Default configuration is charge mode with 4.2V termination and 1.5A current.

Can the SYS output voltage be adjusted beyond 5V?

No-the onboard resistor divider (R1 = 31.6kΩ, R2 = 10kΩ) fixes the SYS output at 5V per the MP2633's internal 1.2V reference and equation VSYS = 1.2V × (1 + R1/R2). To change VSYS, replace R1 and/or R2 with values satisfying that formula; no other on-board components require modification.

What battery types are supported?

The board is validated for single-cell Li-ion and Li-Polymer batteries only, with operational range 2.5–4.35V and charge termination options at 3.6V (for LiFePO₄ compatibility) or 4.2V (standard Li-ion). It does not support NiMH, lead-acid, or multi-cell configurations without redesign.

Is thermal performance characterized on this board?

Yes-the board includes thermal shutdown protection triggered by the MP2633's internal die temperature sensor. Layout uses exposed pad (QFN24 EP) and 2-layer copper pours to dissipate heat; typical surface temperature rise is <15°C above ambient at 1.5A charge/1A boost under forced-air conditions.

Does the board include battery temperature monitoring circuitry?

Yes-it provides a dedicated NTC thermistor interface (RT1, RT2 footprints) compatible with standard 10kΩ β=3950 NTC sensors. The MP2633 reads the voltage divider output at the TS pin to enable charge suspension when battery temperature falls outside user-defined safe limits (e.g., 0–45°C).