Monolithic Power Systems Inc. EVM38222-R-01A

Overview

EVM38222-R-01A from Monolithic Power Systems is an evaluation board for the MPM38222 dual-channel synchronous step-down DC-DC module, designed to demonstrate 2A per channel operation at 1.8V and 1.2V outputs from a 2.7–6V input, with integrated inductors and MOSFETs in a 4mm × 4mm QFN-14 package, targeting compact battery-powered portable electronics.

For engineers reviewing the EVM38222-R-01A datasheet, EVM38222-R-01A pinout, EVM38222-R-01A application, or EVM38222-R-01A equivalent, this board enables rapid validation of dual-output power delivery, light-load efficiency (≥80%), 45µA quiescent current, 1MHz switching, and phase-shifted operation in space-constrained Li+-powered systems.

Technical Context

The EVM38222-R-01A implements the MPM38222 IC-a monolithic dual buck converter with integrated 80mΩ/35mΩ high-side/low-side MOSFETs and inductors-operating across 2.7V–6V input and delivering regulated 1.8V/1.2V outputs with 100% duty-cycle capability and cycle-by-cycle over-current protection.

It supports independent enable control (EN1/EN2), 180° phase-shifted switching to reduce input ripple, and achieves >93% peak efficiency at full load with 22µF ceramic output capacitors, validated under VIN=5V, TA=25°C test conditions per MPS Rev.1.1 documentation.

Key Specifications

Availability

EVM38222-R-01A is available at Aetrix Electronics and suitable for portable instrumentation, smartphone power subsystem validation, and battery-powered IoT device development requiring stable component supply and fast-turn reference design access.

Supply support for EVM38222-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 analog semiconductor company specializing in high-performance power management ICs, with core expertise in integrated power modules and DC-DC conversion technology.

The MPM38222 product line delivers fully integrated, low-profile dual-output power modules targeting space- and efficiency-critical portable applications where PCB area and light-load battery runtime are primary constraints.

FAQ

What is the default output voltage configuration on EVM38222-R-01A?

The board ships with VOUT1 set to 1.8V and VOUT2 to 1.2V using 200kΩ/100kΩ resistor dividers (R1/R2 and R4/R5). These values establish feedback ratios matching the MPM38222's 0.608V internal reference, and can be modified per the formula VOUT = 0.608V × (1 + R1/R2).

Can EVM38222-R-01A operate from a 3.3V input source?

Yes - the board supports inputs from 2.7V to 6V, including 3.3V. Test data confirms >90% peak efficiency at 3.3V input with 1.8V/1.2V outputs and 2A loads, maintaining thermal stability under continuous operation per Rev.1.1 test reports.

How is enable control implemented on this evaluation board?

EN1 and EN2 pins are brought out to test points and support independent channel control. Applying 1.2–6V enables each channel; <0.4V disables it. A 100kΩ pull-up to VIN provides automatic startup, as documented in the Quick Start Guide.

Does the board include input/output filtering and protection components?

Yes - the BOM specifies four 22µF/10V X5R ceramic capacitors (C1–C4, 0805) for input and output filtering, plus no external diodes or TVS devices; protection relies on the MPM38222's built-in hiccup-mode short-circuit and thermal shutdown functions.

Is thermal performance characterized on this board?

Thermal behavior is validated indirectly via efficiency curves and waveform tests at TA=25°C. The 4mm×4mm QFN-14 module's exposed pad is soldered to a 2-layer 1oz copper PCB with thermal vias, supporting 2A/channel operation without forced airflow per test conditions in the documentation.

Can I modify the switching frequency?

No - the MPM38222 uses an internal oscillator fixed at 1MHz; frequency adjustment is not supported. Phase shift (180°) between channels is inherent and non-configurable, reducing input capacitor RMS current by ~30% versus in-phase operation.