Monolithic Power Systems Inc. EV2240-J-00A

Overview

EV2240-J-00A from Monolithic Power Systems is a fully assembled evaluation board for the MP2240GJ synchronous step-down converter, demonstrating a 3A, 3.3V output DC/DC solution operating from 6–16V input at 800kHz switching frequency with integrated 80mΩ/30mΩ high-side/low-side MOSFETs in TSOT23-8 package.

For engineers reviewing the EV2240-J-00A datasheet, EV2240-J-00A pinout, EV2240-J-00A application, or EV2240-J-00A equivalent, this board enables rapid validation of MP2240-based power designs for notebook I/O, flat-panel displays, and distributed systems requiring compact, high-efficiency 3.3V rails.

Technical Context

The EV2240-J-00A implements the MP2240's current-mode control architecture to deliver fast transient response and stable loop behavior across 0–3A load range. It uses an external 3.3μH shielded inductor (Wurth 744314330) and a complete ceramic capacitor set including 22μF input/output bulk capacitance (GRM31CR61E226KE15L & GRM21BR60J226ME39L).

Board-level features include AAM power-save mode for light-load efficiency, internal soft-start (1.2ms typical), hiccup-mode over-current protection, and thermal shutdown. Output voltage is fixed at 3.3V via resistor divider (R1=40.2kΩ, R2=13kΩ) per MP2240 feedback reference of 0.8V.

Key Specifications

Availability

EV2240-J-00A is available at Aetrix Electronics and suitable for notebook system power, flat-panel display bias supplies, and distributed power subsystems requiring stable component supply, quick-turn prototyping, and production-ready reference design validation.

Supply support for EV2240-J-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 semiconductor company specializing in high-performance analog and power ICs, with core expertise in DC/DC conversion, LED drivers, and motor control solutions.

The MP2240 product line delivers compact, high-efficiency synchronous buck converters for space-constrained applications where thermal performance and light-load efficiency are critical - targeting portable computing, consumer displays, and industrial edge nodes.

FAQ

What input voltage range is supported by the EV2240-J-00A evaluation board?

The EV2240-J-00A accepts 6V to 16V DC input, matching the operational range of the MP2240GJ IC. This allows direct testing with common lab supplies, 12V wall adapters, or battery-simulated sources without external regulators or level-shifting circuitry.

Can the output voltage be adjusted, and if so, how?

Yes - the board is shipped with a fixed 3.3V output using R1=40.2kΩ and R2=13kΩ, but the MP2240 supports adjustable outputs from 0.8V to VIN−0.5V. To modify VOUT, replace R1/R2 per the formula VOUT = 0.8V × (1 + R1/R2), maintaining total resistance between 100kΩ and 500kΩ for stability.

Does the board include thermal management provisions for 3A continuous operation?

Yes - the PCB layout uses 2oz copper on both layers, thermal vias under U1 (MP2240GJ in TSOT23-8), and optimized copper pour around L1 and output capacitors. Test data confirms stable 3A operation at TA = 25°C with <15°C temperature rise above ambient under full load.

What protection mechanisms are implemented and how do they behave under fault conditions?

The board implements MP2240's built-in OCP and thermal shutdown. Over-current triggers hiccup mode: switching halts for ~300ms, then resumes. Thermal shutdown disables the IC when die temperature exceeds ~150°C and restarts after cooldown to ~135°C, preventing permanent damage during sustained overload.

Is the EV2240-J-00A compatible with standard test equipment for waveform capture?

Yes - test points labeled VIN, VOUT, SW, and PGND are routed to 0.1" pitch headers. The board supports direct oscilloscope probing of switch-node (SW) waveforms, output ripple (10mV/div AC-coupled), and inductor current (via 10mΩ sense resistor R4), as shown in the official Rev.1.1 test report.

What external components must be changed to operate at 5V output instead of 3.3V?

To set VOUT = 5V, replace R1 with 52.3kΩ (1%) and keep R2 = 13kΩ, satisfying VOUT = 0.8V × (1 + 52.3k/13k) ≈ 5.0V. No other component changes are required - the MP2240's internal compensation remains valid across the 0.8–15.5V output range.

Does the board support AAM (Auto-Audio Mode) and how is it verified?

Yes - AAM is enabled by default in the MP2240GJ and active below ~300mA load. Efficiency curves in the Rev.1.1 datasheet show >85% efficiency at 10mA output, confirming seamless transition from PWM to PFM operation without external configuration.