Monolithic Power Systems Inc. EV4462DQ-00A

Overview

EV4462DQ-00A from Monolithic Power Systems is a fully assembled and tested evaluation board for the MP4462 synchronous step-down converter, supporting 3.5A output at 3.3V from 8–36V input, operating at 500kHz (configurable up to 4MHz), with integrated 100mΩ MOSFET and 5µA shutdown current - used for rapid validation of high-efficiency DC/DC power stages in industrial and automotive power systems.

For engineers reviewing the EV4462DQ-00A datasheet, EV4462DQ-00A pinout, EV4462DQ-00A application, or EV4462DQ-00A equivalent, this board enables immediate functional verification of MP4462-based 3.3V/3.5A power supplies, frequency tuning via R3, output voltage adjustment via R4/R6, EN-controlled sequencing, and UVLO configuration using R1/R2 - all without soldering or layout design.

Technical Context

The EV4462DQ-00A implements the MP4462's current-mode control architecture to deliver fast transient response and stable loop behavior across 8–36V input. It integrates the full power stage: internal high-side/low-side MOSFETs, bootstrap circuitry (with external D2 Schottky diode), and feedback network (R4/R6) set to 3.3V output with 0.8V reference.

Board-level features include configurable switching frequency (500kHz default, adjustable via R3), enable/disable logic with 1.2V/1.6V thresholds, under-voltage lockout preset to 6V (via R1/R2 divider), and soft-start implemented by internal circuitry - all verified per MP4462DQ SOIC8-EP datasheet Rev. 1.0.

Key Specifications

Availability

EV4462DQ-00A is available at Aetrix Electronics and suitable for industrial power systems, automotive subsystems, and battery-powered embedded devices requiring stable component supply, rapid prototyping capability, and production-ready reference design validation.

Supply support for EV4462DQ-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, headquartered in Kirkland, WA, with global design and support operations.

The MP4462 product line delivers high-frequency, high-efficiency synchronous buck regulators for space-constrained, thermally demanding applications - designed specifically for industrial automation, automotive infotainment, and distributed power architectures where input range, light-load efficiency, and EMI control are critical.

FAQ

What input voltage range is supported on the EV4462DQ-00A?

The board operates from 8V to 36V DC input, matching the MP4462's specified VIN range. The onboard UVLO is preset to 6V using R1 (24.9kΩ) and R2 (100kΩ), ensuring reliable startup above that threshold. Input must be applied before enabling the regulator to avoid latch-up.

How is the output voltage set, and can it be changed?

Output is set to 3.3V using R4 = 40.2kΩ and R6 = 127kΩ, per VOUT = 0.8V × (1 + R4/R6). To change VOUT, replace R6 using the formula R6 = 0.8 × R4 / (VOUT − 0.8); compensation, inductor, and output capacitor values must be re-evaluated per MP4462 datasheet Section 8.2.

What is the purpose of D2 (PDS540) on the board?

D2 is an external Schottky bootstrap diode (40V, 5A) required to charge the BST capacitor during high-side FET turn-on. It becomes essential above 2MHz switching frequency due to reduced charge time; at the default 500kHz, the internal charge pump suffices but D2 remains populated for robustness and frequency scalability.

Can the switching frequency be increased beyond 500kHz?

Yes - frequency is set by R3 (100kΩ default) using fs ≈ 70000 / R3(kΩ) kHz. With R3 = 100kΩ, fs = 700kHz; reducing R3 to 75kΩ yields ~933kHz. For >2MHz operation, add D2 and verify BST voltage ripple and thermal performance per MP4462 datasheet Figure 12.

Is the EV4462DQ-00A RoHS-compliant and lead-free?

Yes - the board uses RoHS-compliant, lead-free components and PCB finish, consistent with MPS's standard manufacturing practices and documented in the MP4462DQ device datasheet Rev. 1.0. Full compliance documentation (IPC-1752A) is available upon request for qualified customers.

Does the board include thermal management provisions?

Yes - the MP4462DQ SOIC8-EP package is mounted on a 4-layer PCB with internal copper planes and exposed pad thermal relief. The board layout includes thermal vias under U1 and a 1210-size 22µF output capacitor (C8) optimized for low ESR and heat dissipation at 3.5A load.