Monolithic Power Systems Inc. EVM3822C-RH-00A

Overview

EVM3822C-RH-00A from Monolithic Power Systems is a 2A synchronous step-down module evaluation board designed to demonstrate the MPM3822CGRH DC-DC converter. It supports 2.7V–6V input, delivers 1.2V/2A output with sub-10mV ripple, operates in forced continuous conduction mode, and integrates QFN-18 (2.5mm×3.5mm×1.6mm) power module for FPGA, ASIC, and optical module power applications.

For engineers reviewing the EVM3822C-RH-00A datasheet, EVM3822C-RH-00A pinout, EVM3822C-RH-00A application, or EVM3822C-RH-00A equivalent, this board enables rapid validation of MPM3822CGRH performance-including efficiency vs. load, startup/shutdown behavior, EN/PG sequencing, short-circuit hiccup response, and radiated EMI compliance per EN55022 Class B.

Technical Context

The EVM3822C-RH-00A implements the MPM3822CGRH IC in a fixed 1.2V configuration using two 200kΩ FB resistors (R1/R2), two 22µF X7R ceramic output capacitors (C1/C2), and two 100kΩ EN/OUT_S pull-up resistors (R3/R4). Input capacitance uses dual 22µF 0805 ceramics, optimized for stable operation down to 2.7V input.

It validates Constant-On-Time (COT) control with fast transient response (<1ms recovery from 0→2A load step), 100% duty-cycle capability in dropout, cycle-by-cycle current limiting, thermal shutdown, and hiccup-mode short-circuit protection-all measured under controlled ambient (25°C) and thermal (T_J<125°C) conditions.

Key Specifications

Availability

EVM3822C-RH-00A is available at Aetrix Electronics and suitable for FPGA power delivery, optical transceiver biasing, and space-constrained portable electronics requiring stable component supply and fast design validation cycles.

Supply support for EVM3822C-RH-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, motor drivers, and LED lighting controllers.

The EVM3822C-RH-00A belongs to MPS's evaluation board product line, developed specifically to accelerate adoption of their integrated power modules-emphasizing ease of use, low-noise operation, and compact footprint for next-generation digital loads.

FAQ

What is the default output voltage and how is it set?

The board is configured for 1.2V output using R1 = R2 = 200kΩ in the feedback divider. The MPM3822CGRH's reference voltage is 0.6V, so V_OUT = 0.6V × (1 + R1/R2). To change output, adjust R2 while keeping R1 at 200kΩ as recommended in the Quick Start Guide.

Does the board support input voltages below 3.3V?

Yes, the board operates down to 2.7V input, but the documentation notes that VIN < 3.3V may require additional input capacitance beyond the two 22µF 0805 ceramics provided. No extra components are needed for 3.3V–6V operation.

How is enable and power-good functionality implemented?

EN is pulled high via R3 (100kΩ) to VIN; applying logic-low to EN shuts down the converter. Power Good (PG) is routed to test point OUT_S and pulled up via R4 (100kΩ); PG asserts high when V_OUT reaches 90% of target and remains within ±10% regulation window.

What thermal performance can be expected during 2A continuous operation?

Test data shows full 2A output is sustainable up to 85°C ambient temperature. At 25°C, junction temperature stays below 125°C even under worst-case load and input conditions, confirmed by thermal imaging and ambient temperature vs. output current curves in the EVB report.

Is radiated EMI testing data included in the documentation?

Yes - Figure 5 in the Rev.1.1 document presents radiated emission test results measured on the EVM3822C-RH-00A board, confirming compliance with EN55022 Class B limits across 30MHz–1GHz, validating its suitability for noise-sensitive optical and communication systems.

Can this board be used to evaluate different output voltages?

Yes - the board supports adjustable output from 0.6V to 3.3V by changing R2 in the FB divider. The schematic and BOM specify 0603 film resistors, enabling quick swaps. Performance metrics (efficiency, ripple, transient response) are documented for 1.2V, 1.8V, 2.5V, and 3.3V outputs.