Diodes Incorporated AP66300FVBW-EVM

Overview

AP66300FVBW-EVM from Diodes Incorporated is an evaluation module for the AP66300 3.8V–60V input, 3A synchronous buck converter featuring integrated 120mΩ high-side and 55mΩ low-side MOSFETs, 500kHz default switching frequency, 0.8V feedback reference, and ±5% power-good detection. It supports adjustable output (0.8V–50V), pre-biased start-up, and PFM/PWM mode selection-used in FPGA/DSP power supplies and distributed telecom systems.

For engineers reviewing the AP66300FVBW-EVM datasheet, AP66300FVBW-EVM pinout, AP66300FVBW-EVM application, or AP66300FVBW-EVM equivalent, this module enables rapid validation of the AP66300's efficiency (up to 95%), thermal performance (θJA = 30°C/W on EVM), soft-start sequencing, and protection features including hiccup-mode OCP and thermal shutdown at 165°C.

Technical Context

The AP66300FVBW-EVM implements the AP66300 IC in a U-QFN4040-16/SWP (UXB) package with exposed thermal pad, configured per Diodes' reference layout for optimal thermal dissipation and EMI control. It includes all critical passive components: 10μF input capacitor, dual 22μF output capacitors, 6.5μH inductor (for 5V output), 0.1μF BST capacitor, and precision FB divider network.

This EVM supports full functional verification: MSYNC pin toggling between PFM and forced PWM modes; FS resistor programming (300kHz–2.5MHz); SS/TR-controlled soft-start (1.7ms internal or external capacitor-adjustable); and PG signal monitoring with 1.5ms rising-edge delay and internal 5MΩ pull-up.

Key Specifications

Availability

AP66300FVBW-EVM is available at Aetrix Electronics and suitable for FPGA power delivery, telecom point-of-load conversion, and industrial distributed power architectures requiring stable component supply and fast design validation cycles.

Supply support for AP66300FVBW-EVM 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-efficiency power management, signal integrity, and protection solutions for industrial, computing, and communications markets.

The AP66300FVBW-EVM belongs to Diodes' Power Management Evaluation Platform line, designed specifically to accelerate adoption of their high-voltage synchronous buck converters in applications demanding wide VIN range, low quiescent current, and robust protection.

FAQ

What is the purpose of the AP66300FVBW-EVM?

The AP66300FVBW-EVM is a fully assembled evaluation board that demonstrates the operation and performance of the AP66300 3.8V–60V, 3A synchronous buck converter IC. It includes all necessary passives, thermal layout, and test points to validate efficiency, transient response, soft-start behavior, and protection functions under real-world load and input conditions.

Can the AP66300FVBW-EVM be used for automotive qualification testing?

No-the AP66300FVBW-EVM itself is not AEC-Q200 qualified. While the underlying AP66300 IC can be qualified for automotive use upon request (with PPAP capability and IATF 16949 manufacturing), this evaluation module is intended for lab-based design validation only and lacks automotive-grade component sourcing, extended temperature screening, or vibration/shock certification.

How do I configure the AP66300FVBW-EVM for PFM vs. forced PWM operation?

Configure PFM by connecting the MSYNC pin to GND; configure forced PWM by connecting MSYNC to VCC or a logic-high signal. The EVM provides test points and solder jumpers for both configurations. When synchronized externally, apply a clean 300kHz–2.5MHz clock to MSYNC with ≥250ns pulse width and positive-edge trigger.

Does the AP66300FVBW-EVM support output voltage tracking or sequencing?

Yes-it supports ratiometric, sequential, and absolute tracking via the SS/TR pin. The EVM includes a dedicated SS/TR test point and onboard 0.1μF capacitor for default 1.7ms soft-start. For multi-rail sequencing, connect external timing capacitors or feed a master rail's SS signal into SS/TR using the provided header footprint.