Diodes Incorporated AP61300Z6-EVM

Overview

AP61300Z6-EVM from Diodes Incorporated is an evaluation board for the AP62300/AP62301 3A synchronous buck converter, supporting 4.2V–18V input and delivering regulated 5V output with ±1% accuracy at up to 3A. It implements Constant On-Time (COT) control, features a proprietary gate driver for EMI reduction, and uses a TSOT26-packaged AP62301Z6-7 IC with integrated 75mΩ/45mΩ MOSFETs. The board targets point-of-load DC/DC conversion in consumer power supplies.

For engineers reviewing the AP61300Z6-EVM datasheet, AP61300Z6-EVM pinout, AP61300Z6-EVM application, or AP61300Z6-EVM equivalent, this page provides verified board-level specifications, test-point access details, measured performance data (including 750kHz switching, <20mV output ripple, and >83% light-load efficiency), and BOM-sourced component validation for rapid prototyping and design-in verification.

Technical Context

The AP61300Z6-EVM implements the AP62301Z6-7 IC in a fixed 5V output configuration using R1=52.3kΩ and R2=10kΩ feedback divider, 3.3µH power inductor, and 2×22µF + 10µF ceramic output capacitance. It supports direct 12V input testing with EN pulled high via 100kΩ resistor and exposes VIN, GND, VOUT, SW, and FB test points for oscilloscope and load analysis.

Designed for fast transient response and low EMI, the board leverages the IC's COT architecture and optimized PCB layout-top and bottom copper pours, minimized high-di/dt loop area, and strategic placement of bootstrap (BST) and feedback (FB) routing-to validate real-world performance under 3A load and thermal stress without external compensation.

Key Specifications

Availability

AP61300Z6-EVM is available at Aetrix Electronics and suitable for flat-panel TV power rails, set-top box PoL regulation, network system DC/DC conversion, and consumer electronics prototype validation requiring stable component supply and documented reference performance.

Supply support for AP61300Z6-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 protection solutions for high-volume industrial and consumer markets.

The AP62300/AP62301 product line delivers high-efficiency, low-I_Q buck conversion for space-constrained, EMI-sensitive applications such as displays and networking equipment, with emphasis on ease of use and minimal external components.

FAQ

What input voltage range is validated for the AP61300Z6-EVM?

The board is validated for 12V input per the Quick Start Guide, but supports the full 4.2V–18V range of the AP62301 IC. Input must be applied between VIN and GND terminals; absolute maximum VIN is +20V DC. Operation below 4.2V will disable regulation due to UVLO activation.

How is output voltage set and adjusted on this evaluation board?

Output is fixed at 5.0V using R1=52.3kΩ and R2=10kΩ feedback resistors per Table 1. To adjust VOUT, replace R1 with the value listed for the target voltage (e.g., 31.6kΩ for 3.3V); R2 remains 10kΩ. Ensure resistor tolerance is ≤1% and verify stability with load step testing.

Which test points are provided for measuring switching node and feedback signals?

JH4 is SW (switch node), JH5 is FB (feedback), JH6 is VOUT, and JH7 is GND. JH4 allows direct probing of the 750kHz switching waveform with minimal ground lead length to avoid noise injection; JH5 enables closed-loop stability verification via AC-coupled scope measurement.

Does the AP61300Z6-EVM include thermal monitoring or overtemperature protection circuitry?

No. The board itself has no dedicated thermal sensor or shutdown circuitry. Protection relies entirely on the AP62301Z6-7 IC's internal thermal shutdown (TJ = +150°C) and cycle-by-cycle current limit. Board-level thermal performance is validated via IR imaging in the datasheet, showing safe operation at 3A with 20°C/W ambient rise.