Diodes Incorporated AP62600SJ-EVM

Overview

AP62600SJ-EVM from Diodes Incorporated is an evaluation module for the AP62600 4.5V–18V input, 6A synchronous buck converter IC. It implements a fully integrated power stage with 36mΩ high-side and 14mΩ low-side MOSFETs, supports selectable 400/800/1200kHz switching frequency, operates in PFM/USM/PWM modes, and delivers precise 0.6V ±1% reference regulation - validated for FPGA, DSP, and consumer audio point-of-load applications.

For engineers reviewing the AP62600SJ-EVM datasheet, AP62600SJ-EVM pinout, AP62600SJ-EVM application, or AP62600SJ-EVM equivalent, this page provides verified functional context, measured EMI-reduction performance, soft-start programmability, thermal shutdown behavior, and direct mapping to the AP62600 IC's V-QFN2030-12 (Type A) package layout and control interface.

Technical Context

The AP62600SJ-EVM implements Constant On-Time (COT) control architecture with input-voltage-dependent on-time calculation (t_ON = V_OUT / (V_IN × f_SW)) and fixed 255ns minimum off-time, enabling fast transient response without external compensation. Its proprietary gate driver suppresses switching-node ringing while preserving MOSFET turn-on/turn-off timing.

It validates the AP62600's three-mode operation: PFM for light-load efficiency (<360μA quiescent current), Ultrasonic Mode (USM) to avoid audible noise, and forced PWM for predictable ripple and timing. The board routes all critical signals-including BST, SS/TR, MODE, FSEL, and PG-to accessible test points and headers for real-time mode, frequency, soft-start, and power-good verification.

Key Specifications

Availability

AP62600SJ-EVM is available at Aetrix Electronics and suitable for FPGA power sequencing, consumer audio DC-DC validation, and industrial embedded point-of-load prototyping requiring stable component supply and full-function hardware reference.

Supply support for AP62600SJ-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 power management ICs, specializing in high-efficiency, EMI-optimized DC-DC solutions for consumer, computing, and industrial markets.

The AP62600 product line targets compact, noise-sensitive point-of-load applications-specifically designed to replace multi-component buck solutions with single-chip integration, minimal external parts, and automotive-grade reliability features.

FAQ

What is the primary purpose of the AP62600SJ-EVM?

The AP62600SJ-EVM is a fully assembled and tested evaluation board for the AP62600 synchronous buck converter IC. It enables rapid validation of electrical performance-including efficiency across load, transient response, EMI behavior, and mode-switching functionality-using the exact V-QFN2030-12 (Type A) footprint, layout, and component selection specified in Diodes' reference design.

Does the AP62600SJ-EVM support all three operating modes of the AP62600 IC?

Yes. The board provides dedicated jumpers and test points for MODE and FSEL pins, allowing direct configuration of Pulse Frequency Modulation (PFM), Ultrasonic Mode (USM), and forced Pulse Width Modulation (PWM). Each mode's efficiency curve, ripple profile, and acoustic signature have been measured and documented in the AP62600 datasheet Figures 2–4 and 23–39.

How is EMI reduction implemented and verified on this EVM?

EMI reduction is achieved through the AP62600's proprietary gate driver, which damps switching-node ringing without extending MOSFET transition times. The EVM validates this by demonstrating clean SW node waveforms (Figures 18–44) and reduced high-frequency radiated emissions-confirmed via conducted/radiated EMI testing referenced in Diodes' application notes AN-42003 and AN-42004.

Can the AP62600SJ-EVM be used for automotive qualification pre-validation?

No. While the base AP62600 IC supports AEC-Q100 qualification upon request, the AP62600SJ-EVM itself is a commercial-grade evaluation platform-not qualified to AEC-Q200 or IATF 16949. It serves as a functional and electrical reference only; automotive designs require separate PPAP-capable manufacturing and stress testing per Diodes' automotive product definitions.