Diodes Incorporated AP63357QZV-EVM

Overview

AP63357QZV-EVM from Diodes Incorporated is an automotive-compliant evaluation board for the AP63357Q synchronous buck converter, supporting 3.8V–32V input, 3.5A continuous output, 450kHz switching, 22µA quiescent current in PFM mode, and 0.8V ±1% reference voltage. It enables rapid validation of 5V/3.5A power delivery in automotive infotainment and instrument cluster designs.

For engineers reviewing the AP63357QZV-EVM datasheet, AP63357QZV-EVM pinout, AP63357QZV-EVM application, or AP63357QZV-EVM equivalent, this board provides direct access to VIN, VOUT, EN, SW, BST, PG, FB, COMP, and GND test points with preconfigured 5V output, AEC-Q100 Grade 1 thermal operation (−40°C to +125°C), and EMI-optimized layout per Diodes' functional block diagram.

Technical Context

The AP63357QZV-EVM implements peak current mode control with integrated compensation, enabling stable regulation without external loop components. Its design incorporates Frequency Spread Spectrum (±6% jitter) and a proprietary gate driver to suppress switching node ringing-reducing high-frequency radiated EMI without degrading MOSFET turn-on/turn-off timing.

This board supports low-dropout (LDO) mode operation and features a precision enable threshold (1.18V typical), 5MΩ internal pull-up on the Power Good (PG) pin, and comprehensive protection including UVLO, OVP, UVP, cycle-by-cycle current limit, and thermal shutdown-fully aligned with automotive body electronics safety requirements.

Key Specifications

Availability

AP63357QZV-EVM is available at Aetrix Electronics and suitable for automotive infotainment systems, instrument clusters, and telematics modules requiring stable component supply, traceable sourcing, and production-ready evaluation support.

Supply support for AP63357QZV-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 power management, signal integrity, and automotive-grade solutions with ISO/TS 16949-certified operations.

The AP63357Q product line delivers high-efficiency, low-I_Q DC-DC conversion for 12V automotive subsystems-designed specifically to meet stringent EMI, thermal, and reliability demands of body electronics and ADAS power rails.

FAQ

What input voltage range is supported on the AP63357QZV-EVM?

The board accepts 3.8V to 32V DC input, as specified for the AP63357Q IC. The Quick Start Guide validates operation at 12V input with 5V/3.5A output. Absolute maximum rating is 40V for 400ms transients, but sustained operation must remain within the 3.8–32V range to ensure proper UVLO and regulation stability.

How is output voltage configured on this evaluation board?

The AP63357QZV-EVM is factory-configured for 5V output using R5 = 157kΩ and R6 = 30kΩ feedback resistors, yielding V_OUT = 0.8V × (1 + R5/R6). The board supports reconfiguration via solder jumper or resistor replacement-per Table 1 in the datasheet-for outputs from 1.0V to 12V with 1% tolerance resistors.

Does the board include EMI-reduction features from the AP63357Q IC?

Yes-the board implements all EMI mitigation features of the AP63357Q: Frequency Spread Spectrum (±6% switching frequency jitter) and the proprietary gate driver topology that minimizes switching node ringing. Layout follows Diodes' recommended PCB stackup and decoupling (C2, C3, C4, C6, L1) to preserve these benefits in system-level testing.

What protection functions are accessible and verified on the AP63357QZV-EVM?

All protection circuits of the AP63357Q are implemented and testable: undervoltage lockout (UVLO), output overvoltage (OVP) and undervoltage (UVP) protection, cycle-by-cycle peak current limiting, and thermal shutdown. The Power Good (PG) pin provides active-high status with 5MΩ internal pull-up, and EN pin supports precise 1.18V enable threshold adjustment.