Vishay Siliconix SIC462EVB-A

Overview

SIC462EVB-A 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 implements voltage-mode constant-on-time (COT) control with ultrasonic mode, power-good signaling, and full protection including OCP, OVP, UVP, and OTP.

For engineers reviewing the SIC462EVB-A datasheet, SIC462EVB-A application, SIC462EVB-A setup, or SIC462EVB-A compatibility with SiC462ED-T1-GE3, this board enables rapid prototyping of wide-input industrial, telecom, and robotics power supplies - particularly where fast transient response, light-load efficiency, and ceramic-capacitor stability are required.

Technical Context

The SIC462EVB-A implements the SiC462 IC in a fully assembled, tested layout optimized for thermal performance and EMI control. It integrates all critical passive components - including input/output capacitors, bootstrap network, feedback divider, soft-start capacitor, and ripple injection network (Rx/Cx/Cy) - to support stable operation across 100 kHz–2 MHz switching frequencies and VIN = 4.5–60 V.

Board-level features include accessible test points for VCIN, VFB, COMP, VSNS, PGOOD, EN, MODE, and ULTRASONIC; jumper-selectable soft-start time and current limit; and configurable operation modes (forced CCM, power-save, ultrasonic). The design validates SiC462's adaptive zero-current detection, diode emulation, and loop stability with low-ESR ceramic output capacitors.

Key Specifications

Availability

SIC462EVB-A is available at Aetrix Electronics and suitable for industrial automation, telecom power supply development, and robotics embedded power design requiring stable component supply, quick-turn validation, and production-representative thermal and EMI performance.

Supply support for SIC462EVB-A 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 integration, reliability, and thermal performance.

The SiC46x family - including the SiC462 targeted by SIC462EVB-A - was designed for wide-input, high-density point-of-load regulation in computing, industrial, telecom, and battery-powered systems demanding fast transient response and robust protection without external compensation complexity.

FAQ

What is the primary function of the SIC462EVB-A evaluation board?

The SIC462EVB-A evaluation board is a fully assembled reference design that demonstrates the operation and performance of the SiC462 6 A synchronous buck regulator. It enables engineers to validate input/output behavior, loop stability, protection features, and thermal performance under real-world conditions - accelerating design-in of the SiC462ED-T1-GE3 in applications such as industrial PLCs and telecom power modules. The SIC462EVB-A includes all necessary passives, test points, and configuration jumpers for immediate bench testing.

Does the SIC462EVB-A support adjustable output voltage, and how is it configured?

Yes, the SIC462EVB-A supports adjustable output voltage from 0.8 V up to 0.92 × VIN, configured using an external resistor divider connected to the VFB pin of the onboard SiC462ED-T1-GE3. The board ships with default resistors setting a nominal 5 V output, but users can replace R_UP and R_DOWN to achieve other regulated voltages while maintaining ±1 % accuracy over −40 °C to +125 °C. The SIC462EVB-A's layout preserves signal integrity for the feedback path to ensure stable regulation.

Can the SIC462EVB-A be used to evaluate light-load efficiency and power-save mode?

Yes, the SIC462EVB-A fully supports light-load evaluation through its configurable MODE and ULTRASONIC pins. By setting the MODE pin via jumper to power-save mode and enabling ultrasonic operation (ULTRASONIC tied to VDD), the board demonstrates diode emulation and frequency foldback - achieving high efficiency even below 100 mA load. The SIC462EVB-A's accessible SW and PHASE nodes allow direct measurement of gate drive timing and inductor current zero-crossing, confirming proper power-save activation per the SiC462ED-T1-GE3 specification.

How does the SIC462EVB-A handle output capacitor stability with ceramic types?

The SIC462EVB-A incorporates a pre-optimized ripple injection network (Rx, Cx, Cy) on the VSNS pin to ensure stable operation with low-ESR ceramic output capacitors - a key requirement for the SiC462ED-T1-GE3's voltage-mode COT architecture. This network generates controlled ramp injection (VRAMP ≥ 100 mV, ≤ 900 mV) to prevent subharmonic oscillation and noise sensitivity. The SIC462EVB-A's layout places Rx/Cx/Cy close to VSNS and AGND, preserving signal fidelity and enabling direct validation of ceramic-capacitor compatibility without external redesign.

Is the SIC462EVB-A compatible with Vishay PowerCAD simulation tools?

Yes, the SIC462EVB-A corresponds directly to the SiC462 device model in Vishay's PowerCAD online design simulator. Users can import the board's exact component values - including inductor (L), input/output capacitors (CIN/COUT), feedback resistors (RUP/RDOWN), soft-start capacitor (CSS), and ripple injection network (Rx/Cx/Cy) - into PowerCAD to simulate efficiency, thermal rise, loop response, and transient behavior before hardware testing. This alignment ensures the SIC462EVB-A serves as a physical counterpart to the virtual design flow for the SiC462ED-T1-GE3.