Vishay Siliconix SIC466EVB-D

Overview

SIC466EVB-D from Vishay Siliconix is a reference evaluation board designed to demonstrate and validate the SiC466 10 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, and enables full characterization of power stage efficiency, transient response, soft-start behavior, and protection features-including OCP, OVP, UVP, OTP, and PGOOD-in industrial and telecom power supply applications.

For engineers reviewing the SIC466EVB-D datasheet, SIC466EVB-D pinout, SIC466EVB-D application, or SIC466EVB-D equivalent, this board provides verified layout, component selection guidance (including CIN, COUT, BOOT, SS, fSW, ILIMIT), thermal performance data, and PowerCAD-compatible design validation for rapid prototyping of high-density 10 A microBUCK® solutions.

Technical Context

The SIC466EVB-D implements the SiC466 IC in a fully assembled, tested, and documented 5 mm × 5 mm MLP55-27L footprint with optimized PCB layout for minimal loop inductance, thermal management, and EMI control. It integrates all critical external components-input/output capacitors, bootstrap network, feedback divider, soft-start capacitor, frequency-setting resistor, and mode configuration-to enable immediate functional evaluation without design iteration.

It supports all SiC466-specific operating modes (forced CCM, power-save), programmable current limit (50 %/75 %/100 %), adjustable switching frequency (100 kHz–2 MHz), pre-bias start-up, output voltage tracking, and seamless transition between internal and external VDRV biasing-directly reflecting the IC's voltage-mode constant-on-time (COT) control architecture with adaptive zero-current detection.

Key Specifications

Availability

SIC466EVB-D is available at Aetrix Electronics and suitable for industrial automation, telecom power supplies, and server computing applications requiring stable component supply, fast design validation, and production-ready reference implementation.

Supply support for SIC466EVB-D 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 reliability, thermal performance, and integration density.

The SiC466EVB-D belongs to Vishay's microBUCK® family reference board series, engineered to accelerate adoption of wide-input, high-current synchronous buck regulators in space-constrained, thermally demanding industrial and infrastructure systems.

FAQ

What is the primary function of the SIC466EVB-D evaluation board?

The SIC466EVB-D is a fully assembled reference board for the SiC466 10 A synchronous buck regulator. It enables engineers to evaluate real-world performance-including efficiency, transient response, thermal behavior, and protection activation-without designing a custom PCB. The board implements all recommended layout practices, component values, and signal access points defined in Vishay's S25-1437 datasheet, making it a turnkey validation platform for the SiC466 IC.

Does the SIC466EVB-D support adjustable output voltage and switching frequency?

Yes, the SIC466EVB-D supports both. Output voltage is adjusted via the external feedback resistor divider connected to VFB (pin 22) and VOUT (pin 20), enabling settings down to 0.8 V. Switching frequency is set by an external resistor on the fSW pin (pin 24), covering 100 kHz to 2 MHz; the board includes a default resistor for 500 kHz operation but allows easy replacement for other frequencies.

How does the SIC466EVB-D implement overcurrent protection testing?

The SIC466EVB-D exposes the ILIMIT pin (pin 25), allowing direct configuration of the SiC466's valley current limit to 50 %, 75 %, or 100 % of its rated 10 A capability. This enables repeatable OCP threshold validation under load transients. The board also provides test points for SW, PHASE, and PGOOD to capture fault timing and recovery behavior during short-circuit or overload events.

Can the SIC466EVB-D be used to evaluate power-save mode and light-load efficiency?

Yes. The SIC466EVB-D includes the MODE pin (pin 27) with configurable pull-up resistors to select among four operational modes-including diode emulation and frequency foldback-enabling direct measurement of light-load efficiency improvements. Its low-noise layout and accessible VDRV/VDD monitoring points allow accurate quiescent current (156 μA typ.) and shutdown current (4 μA typ.) verification per the SiC466 datasheet.

Is thermal performance data available for the SIC466EVB-D under full 10 A load?

Yes. Vishay's S25-1437 datasheet includes thermal images and junction temperature measurements for the SIC466EVB-D operating at 10 A, 48 V_IN → 12 V_OUT, demonstrating ≤150 °C peak junction temperature at +60 °C ambient with standard airflow. The board's thermal design uses thick copper layers, thermal vias under PGND pads, and optimized MOSFET placement to replicate production-grade thermal performance.