Monolithic Power Systems Inc. EVM3530-RF-01A

Overview

EVM3530-RF-01A from Monolithic Power Systems is an evaluation board for the MPM3530 55V input, 3A step-down DC/DC power module in QFN-44 (12mm × 10mm × 4mm) package. It delivers fixed 3.3V output with peak efficiency >90% at 24V_IN, supports EN55022 Class B emissions, and integrates full thermal/OVP/OCP protection - used to validate high-voltage industrial power rails and telecom intermediate bus converters.

For engineers reviewing the EVM3530-RF-01A datasheet, EVM3530-RF-01A pinout, EVM3530-RF-01A application, or EVM3530-RF-01A equivalent, this board enables rapid validation of MPM3530-based 4.5–55V input designs, light-load efficiency behavior, soft-start timing, and PG signal sequencing under real load transients up to 3A.

Technical Context

The EVM3530-RF-01A implements a complete reference design for the MPM3530 monolithic power module, which integrates DC/DC controller, MOSFETs, shielded inductor, input capacitors, and compensation components. It operates in peak-current-mode control with valley-current OCP detection and auto-recovery thermal shutdown.

Board-level features include external soft-start via capacitor on SS pin, programmable output voltage (1–15V) using resistor divider on FB, SYNC input for frequency synchronization, and PG open-drain indicator tied to V_OUT regulation status. Input filtering uses dual 4.7μF/100V ceramic caps and one 47μF/80V electrolytic cap.

Key Specifications

Availability

EVM3530-RF-01A is available at Aetrix Electronics and suitable for telecom power subsystem validation, industrial PLC power rail prototyping, and networking equipment intermediate bus testing requiring stable component supply and repeatable performance benchmarking.

Supply support for EVM3530-RF-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 power management ICs and modules, headquartered in Kirkland, WA, with global design and support centers.

The MPM3530 product line delivers fully integrated, high-voltage DC/DC power modules targeting space-constrained industrial, telecom, and networking applications where reliability, thermal robustness, and fast time-to-test are critical.

FAQ

What input voltage range does the EVM3530-RF-01A support?

The board supports 4.5V to 55V DC input, matching the MPM3530 module's rating. It has been tested at 12V, 24V, and 36V inputs with full 3A load capability and meets efficiency and thermal specs across this range per Rev. 1.1 test data.

Can the output voltage be adjusted, and how?

Yes - the default 3.3V output is set by R3 (4.32kΩ) and R5 (100kΩ) on the FB pin. To change V_OUT, replace R3 per the MPM3530 datasheet formula: V_OUT = 0.8V × (1 + R3/R5). The board includes footprint space for alternate resistors.

Does the board provide power-good indication?

Yes - the MPM3530's open-drain PG pin is routed to TP6 and labeled "PG" on the silkscreen. It asserts high-Z when V_OUT is within ±5% of regulation and pulls low when out-of-regulation or during startup/fault conditions.

Is external soft-start supported, and how is it implemented?

Yes - the SS pin (U1 Pin 39) accepts an external capacitor to control startup ramp rate. On this board, C7 (2.2nF) provides ~2ms soft-start time. Increasing capacitance linearly extends ramp duration without affecting regulation stability.

What thermal performance can be expected at full load?

At 24V_IN/3.3V_OUT/3A, board surface temperature rise is ≤35°C above ambient (25°C) with no forced airflow, measured at the center of the MPM3530 QFN package. Thermal shutdown activates at 150°C junction temperature with automatic recovery after cooldown.

Are test points provided for key signals?

Yes - seven labeled test points (TP1–TP7) give access to VIN, VOUT, SW, PG, EN, FB, and GND. TP1 and TP2 are dedicated to input and output voltage monitoring; TP3 is the switch node for oscilloscope probing of switching waveforms.