Monolithic Power Systems Inc. EVQ4462-N-00A

Overview

EVQ4462-N-00A from Monolithic Power Systems is an AEC-Q100-qualified evaluation board for the MPQ4462DN step-down regulator, supporting 3.5A output at 3.3V with 8–36V input range, 4MHz switching capability, and SOIC8E-mounted IC. It enables rapid validation of automotive-grade DC/DC conversion in battery-powered and industrial power systems.

For engineers reviewing the EVQ4462-N-00A datasheet, EVQ4462-N-00A pinout, EVQ4462-N-00A application, or EVQ4462-N-00A equivalent, this board provides fully assembled, tested hardware to verify MPQ4462DN performance under real load transients, UVLO thresholds, soft-start behavior, and efficiency across 12V/24V/36V input conditions.

Technical Context

The EVQ4462-N-00A implements a current-mode controlled buck converter using the MPQ4462DN IC, which integrates a 100mΩ high-side MOSFET and supports adjustable frequency (via R3) and output voltage (via R6/R8 divider). It features internal soft-start, 5µA shutdown quiescent current, and input UVLO preset to 6V via R1/R2.

Board-level design includes dual-stage output filtering (C5/C6 = 2.2µF X7R 1210 + C15 = 22µF X7R 1210), bootstrap diode D2 (PDS540), and selectable inductor options (Wurth 7443251000 or TOKO D104C-919AQ-100M), enabling stable 3.5A operation up to 36V input with peak efficiency >95% at 12V_IN/3.3V_OUT.

Key Specifications

Availability

EVQ4462-N-00A is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC power rails, game machine DC/DC staging, and battery-powered portable instrumentation requiring stable component supply and AEC-Q100-compliant reference validation.

Supply support for EVQ4462-N-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 global design centers and ISO/TS 16949-certified quality systems.

The MPQ4462 product line delivers high-frequency, high-efficiency buck regulators for automotive and industrial applications where compact size, thermal robustness, and AEC-Q100 qualification are mandatory.

FAQ

What input voltage range is supported by the EVQ4462-N-00A board?

The board operates from 8V to 36V DC input, matching the MPQ4462DN's specified range. Input UVLO is factory-set to 6V using R1 (100kΩ) and R2 (24.9kΩ), ensuring reliable startup above nominal 12V automotive battery levels even during cranking dips.

How is output voltage configured on this evaluation board?

VOUT is set to 3.3V using resistor divider R6 (40.2kΩ) and R8 (determined per formula: R8 = 40.2 × (VOUT − 0.8)/0.8 kΩ). The feedback reference is fixed at 0.8V, and R8 is populated as 124kΩ to achieve 3.3V. Changing VOUT requires recalculating R8 and verifying compensation network stability.

Does the board support switching frequency adjustment?

Yes - frequency is set by R3 (200kΩ default), yielding ~500kHz. The relationship is f_s(kHz) ≈ 70,000 / R3(kΩ); reducing R3 increases frequency up to 4MHz. Above 2MHz, an external bootstrap diode (e.g., PDS540) must be used to maintain gate drive strength due to reduced charge time.

What inductor options are validated on this board?

Three inductors are listed in the BOM: Wurth 7443251000 (10µH, 7.2A, 16.3mΩ), TOKO D104C-919AQ-100M (10µH, 4.3A, 26.5mΩ), and Cooper DR1050-100R (10µH, 4.58A, 22.5mΩ). Only the Wurth part meets full 3.5A thermal and saturation margin at 36V_IN.

Is the EVQ4462-N-00A AEC-Q100 qualified?

Yes - the board hosts the MPQ4462DN, which is AEC-Q100 Grade 1 qualified (−40°C to +125°C ambient). The evaluation board itself carries no separate qualification, but its layout, component selection (e.g., automotive-grade capacitors, inductors), and test conditions align with AEC-Q100 system-level validation requirements.

Can the EN pin be used for sequencing or remote control?

Yes - EN accepts logic-level signals: >1.6V turns on the regulator; <1.2V disables it. This allows integration into system power sequencing, microcontroller-controlled sleep/wake, or fault-triggered shutdown. Internal pull-down ensures safe default-off state when EN is left floating.