Vishay Siliconix SIC462EVB

Overview

SIC462EVB from Vishay Siliconix is a reference evaluation board designed to demonstrate and validate the SiC462 6 A synchronous buck DC/DC converter in its MLP55-27L package. It supports 4.5 V to 60 V input, delivers adjustable output down to 0.8 V, operates up to 2 MHz, and enables fast transient response with ceramic output capacitors - ideal for industrial power supplies and telecom base station auxiliary rails.

For engineers reviewing the SIC462EVB datasheet, SIC462EVB application circuit, SIC462EVB layout guidelines, or SIC462EVB design support tools, this board provides verified thermal performance, full protection feature validation (OCP, OVP, UVP, OTP), and direct access to all control pins (fSW, ILIMIT, MODE, ULTRASONIC, SS) for configuration tuning and system integration testing.

Technical Context

The SIC462EVB implements the SiC462 microBUCK® regulator in forced CCM, power-save, or ultrasonic mode - selectable via MODE and ULTRASONIC pins. It validates the voltage-mode constant-on-time (COT) control architecture with adaptive zero-current detection, external ripple injection (VSNS network), and dual-loop compensation (VFB + VSNS).

This board demonstrates real-world operation of the SiC462's integrated 6 A power stage, including programmable soft-start (via SS capacitor), adjustable current limit (ILIMIT resistor), and 100 kHz–2 MHz switching frequency (set by fSW resistor), all while maintaining ±1 % output voltage accuracy across –40 °C to +125 °C.

Key Specifications

Availability

SIC462EVB is available at Aetrix Electronics and suitable for industrial automation power modules, telecom base station auxiliary supplies, and robotics motor control subsystems requiring stable component supply, rapid prototyping validation, and production-ready reference design fidelity.

Supply support for SIC462EVB 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

Vishay Siliconix is a global leader in discrete semiconductors and passive components, specializing in high-efficiency power management solutions with emphasis on ruggedness, thermal performance, and reliability in harsh environments.

The SiC46x family - including the SiC462 supported by SIC462EVB - was engineered for wide-input industrial and telecom DC/DC conversion where input rail instability, light-load efficiency, and fast transient immunity are critical design constraints.

FAQ

What is the primary function of the SIC462EVB evaluation board?

The SIC462EVB is a fully assembled reference board that demonstrates the operational behavior, thermal performance, and protection features of the SiC462 6 A synchronous buck regulator. It enables engineers to validate input/output voltage ranges, configure switching frequency and current limit, verify soft-start timing, and assess loop stability using the provided COMP and VSNS networks - all without custom PCB development. The SIC462EVB directly supports rapid integration of the SIC462 into end systems.

Does the SIC462EVB support ultrasonic mode operation for the SiC462?

Yes, the SIC462EVB includes a dedicated ULTRASONIC jumper that connects to VDD by default, enabling ultrasonic mode - ensuring minimum switching frequency remains above 20 kHz to eliminate audible noise during light-load operation. Removing the jumper floats the ULTRASONIC pin, disabling ultrasonic mode and allowing operation down to hundreds of Hz in power-save mode. This configuration is fully validated on the SIC462EVB for both modes.

Can the SIC462EVB be used to evaluate different output voltages with the SiC462?

Yes, the SIC462EVB supports adjustable output voltage from 0.8 V to near VIN via an external resistor divider connected to the VFB pin. The board includes footprint options for standard 0805 resistors and test points for measuring VFB, COMP, and VSNS signals - enabling precise tuning and stability verification across multiple output configurations. All SIC462EVB measurements confirm ±1 % output accuracy over temperature when configured per datasheet guidelines.

How does the SIC462EVB validate overcurrent protection for the SiC462?

The SIC462EVB implements the SiC462's pulse-by-pulse valley current limit using an external ILIMIT resistor (R_ILIM) tied to AGND. With R_ILIM = 60 kΩ, the board validates 6.4–9.6 A OCP threshold across –10 °C to +125 °C, as specified for SiC462. Test points allow oscilloscope monitoring of SW and PHASE waveforms during overload events, confirming immediate high-side MOSFET disable and auto-retry behavior after fault clearance - fully consistent with SIC462EVB's documented protection sequence.

Is PowerCAD simulation support available for designs based on the SIC462EVB?

Yes, Vishay's PowerCAD online design tool includes the SiC462 model and supports full schematic capture, loop compensation analysis, thermal estimation, and efficiency prediction - all aligned with the SIC462EVB's component values and layout. Engineers can import SIC462EVB reference schematics into PowerCAD to simulate startup behavior, transient response under load steps, and ripple performance before hardware iteration - accelerating time-to-validation for designs derived from the SIC462EVB.