Monolithic Power Systems Inc. EVM3833C-RH-00A

Overview

EVM3833C-RH-00A from Monolithic Power Systems is a 3A synchronous step-down converter evaluation board designed to demonstrate the MPM3833CGRH integrated power module. It supports 2.7V–6V input, delivers 1.2V/3A output with <10mV ripple using a single 22µF output capacitor, and features EN control, Power Good signaling, and forced CCM operation for FPGA, ASIC, and optical module power applications.

For engineers reviewing the EVM3833C-RH-00A datasheet, EVM3833C-RH-00A pinout, EVM3833C-RH-00A application, or EVM3833C-RH-00A equivalent, this board enables rapid validation of MPM3833CGRH performance in low-noise, space-constrained DC-DC designs requiring fast transient response, thermal robustness up to 125°C junction, and EN/PG sequencing capability.

Technical Context

The EVM3833C-RH-00A implements the MPM3833CGRH QFN-18 (2.5mm×3.5mm×1.6mm) module with integrated MOSFETs and inductor, operating in forced continuous conduction mode using Constant-On-Time (COT) control. It achieves sub-10mV output voltage ripple at 3A load with only one 22µF X7R ceramic output capacitor and requires just four external components: two 200kΩ FB resistors (R1/R2), two 100kΩ pull-up/down resistors (R3/R4), and input/output capacitors.

Tested performance includes >90% peak efficiency at 5V_IN/1.2V_OUT/3A, <0.5% load regulation across 0–3A, ±0.1% line regulation from 2.7V–6V, and EN/PG thresholds characterized over –50°C to +125°C. Radiated EMI meets EN55022 Class B without added shielding.

Key Specifications

Availability

EVM3833C-RH-00A is available at Aetrix Electronics and suitable for FPGA power delivery, optical transceiver biasing, and portable embedded system prototyping requiring stable component supply, pre-validated layout, and production-ready thermal performance.

Supply support for EVM3833C-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The EVM3833C-RH-00A belongs to MPS's evaluation board product line for its monolithic DC-DC modules, engineered specifically to accelerate adoption of compact, high-efficiency power solutions in space-constrained, noise-sensitive applications like optical networking and high-speed digital logic.

FAQ

What is the default output voltage, and how is it adjusted?

The board is configured for 1.2V output using R1 = R2 = 200kΩ. Output voltage is adjusted via the feedback resistor divider: V_OUT = 0.6V × (1 + R1/R2). For example, 1.8V requires R1 = 200kΩ and R2 = 100kΩ. The reference voltage at FB is fixed at 0.6V, and resistor tolerance directly impacts accuracy.

Does the board support input voltages below 3.3V, and what is required?

Yes - the board operates down to 2.7V input. However, the documentation specifies that VIN < 3.3V may require additional input capacitance beyond the standard 22µF to maintain stability and reduce input ripple under full 3A load conditions.

How is Power Good (PG) functionality verified on this board?

PG asserts high when V_OUT reaches 92% of target (e.g., ≥1.104V for 1.2V setting) and deasserts at 88% (≤1.056V). Test waveforms in the Rev.1.1 document confirm PG timing during startup, shutdown, and load transients, with UV/OV thresholds characterized across –50°C to +125°C.

Can the board be used for thermal performance evaluation?

Yes - thermal rise vs. output current data shows ≤40°C temperature increase at 3A ambient load (TA = +25°C), and the board's layout uses internal copper planes and exposed pad grounding to replicate production thermal behavior of the MPM3833CGRH QFN-18 package.

Is EN pin functionality tested, and what are its threshold levels?

EN rising/falling thresholds are measured at 0.95V/0.85V nominal, with full characterization across temperature (–50°C to +125°C) included in the Rev.1.1 test report. Startup delay from EN assertion to regulated V_OUT is <2ms, and EN slew rate immunity is verified per MPS specification.

Are input and output capacitors populated, and what are their specifications?

Yes - two 22µF, 16V, X7R, 0805 ceramic capacitors (TDK C2012X7R1C226MT000N) are mounted for both input (C1) and output (C2). No C1A/C2A placeholders are populated; the design relies solely on these two capacitors for full 3A operation with <10mV ripple.