Diodes Incorporated AP63356QZV-EVM

Overview

AP63356QZV-EVM from Diodes Incorporated is an automotive-compliant evaluation board for the AP63356Q 32V, 3.5A synchronous buck converter. It supports input voltages from 3.8V to 32V, delivers a precision 0.8V ±1% reference, operates at 450kHz fixed frequency, and integrates EMI-reduction features including Frequency Spread Spectrum (±6% jitter) and a proprietary gate driver. The board is configured for 5V output and targets automotive infotainment and instrument cluster power supply validation.

For engineers reviewing the AP633556QZV-EVM datasheet, AP63356QZV-EVM pinout, AP63356QZV-EVM application, or AP63356QZV-EVM equivalent, this evaluation module enables rapid characterization of efficiency, output ripple, thermal behavior, and transient response under automotive-grade load conditions - especially for designs requiring AEC-Q100 Grade 1 compliance, low-I_Q, and robust EMI performance in 12V systems.

Technical Context

The AP63356QZV-EVM implements peak current mode control with internal compensation, enabling stable operation with minimal external components. It supports programmable output voltage via resistor divider (R5/R6), includes a 5MΩ internal pull-up on the Power Good (PG) pin, and features precision enable threshold adjustment for custom UVLO.

This board demonstrates the AP63356Q's integrated protection suite: cycle-by-cycle overcurrent, thermal shutdown, output overvoltage/undervoltage protection, and undervoltage lockout. Its layout follows automotive PCB best practices - including wettable flank-compatible V-DFN3020-13/SWP packaging, optimized power routing, and test-point access to SW, FB, EN, PG, BST, and COMP signals.

Key Specifications

Availability

AP63356QZV-EVM is available at Aetrix Electronics and suitable for automotive infotainment system validation, instrument cluster power design, ADAS subsystem testing, and body electronics development requiring stable component supply and AEC-Q100-aligned reference hardware.

Supply support for AP63356QZV-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-reliability power management, signal integrity, and protection solutions for automotive, industrial, and consumer markets.

The AP63356Q product line delivers automotive-grade DC-DC conversion with integrated MOSFETs, EMI-optimized switching, and AEC-Q100 Grade 1 qualification - designed specifically for 12V/24V vehicle subsystems where space, thermal headroom, and electromagnetic compatibility are critical.

FAQ

What input voltage range does the AP63356QZV-EVM support during evaluation?

The AP63356QZV-EVM supports input voltages from 3.8V to 32V DC, matching the AP63356Q IC's operational range. It has been validated with 12V input for 5V output at full 3.5A load, and withstands transient conditions up to 40V for 400ms per absolute maximum ratings - making it suitable for automotive cold-crank and load-dump stress testing.

How is output voltage set on the AP63356QZV-EVM, and can it be reconfigured?

The board ships configured for 5V output using R5 = 157kΩ and R6 = 30kΩ per the formula V_OUT = 0.8V × (1 + R5/R6). These resistors are 0603 footprints with 1% tolerance; users may replace them to program other outputs (e.g., 3.3V, 1.0V, or 12V) following Table 1 in the datasheet and recommended compensation values.

Does the AP63356QZV-EVM include EMI mitigation features demonstrated in the final design?

Yes - the board implements the AP63356Q's built-in EMI reduction techniques: Frequency Spread Spectrum (±6% switching frequency jitter) and a proprietary gate driver that suppresses switch-node ringing. Layout includes tight SW/GND loops, split ground planes, and wettable-flank QFN mounting - all verified to meet CISPR 25 Class 5 radiated emission limits in typical automotive enclosures.

What thermal performance can be expected from the AP63356QZV-EVM at full load?

At 12V input and 5V/3.5A output, the AP63356QZV-EVM achieves ≥92% peak efficiency and maintains junction temperature below 115°C in still air at +25°C ambient. Thermal imaging confirms hotspot localization at the AP63356Q die and inductor; copper pour and thermal vias under the V-DFN3020-13 package ensure conduction-limited rise consistent with AEC-Q100 Grade 1 requirements.