Diodes Incorporated AP61302Z6-EVM

Overview

AP61302Z6-EVM from Diodes Incorporated is an evaluation board for the AP62301 synchronous buck converter, supporting 4.2V–18V input and delivering regulated 5V/3A output using Constant On-Time (COT) control, integrated 75mΩ/45mΩ MOSFETs, and EMI-optimized gate drive. It enables rapid validation of power stage efficiency, transient response, and thermal behavior in point-of-load applications.

For engineers reviewing the AP61302Z6-EVM datasheet, AP61302Z6-EVM pinout, AP61302Z6-EVM application, or AP61302Z6-EVM equivalent, this board provides direct access to VIN, EN, SW, FB, VOUT, and GND test points; supports configurable feedback via R1/R2; includes full BOM with Wurth inductor and KEMET X7R capacitors; and ships pre-configured for 5V ±1% output at 3A load.

Technical Context

The AP61302Z6-EVM implements the AP62301 IC in TSOT26 package with fixed 5V output set by 52.3kΩ/10kΩ resistor divider, 3.3µH shielded inductor (Wurth 744311330), and dual 22µF + 10µF X7R ceramic output capacitance. It operates at 750kHz switching frequency with COT architecture enabling sub-10µs load-step response.

Board-level design incorporates EMI-reduction techniques including minimized high-di/dt loop area, dedicated ground plane, bootstrap capacitor decoupling (0.1µF), and low-ESR input/output capacitors. Thermal performance is validated up to 3A continuous load at +25°C ambient with no forced airflow.

Key Specifications

Availability

AP61302Z6-EVM is available at Aetrix Electronics and suitable for flat-screen TV power rails, set-top box PoL conversion, network system auxiliary supplies, and industrial embedded controllers requiring stable component supply and fast design validation cycles.

Supply support for AP61302Z6-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 consumer, industrial, and communications markets.

The AP62300/AP62301 product line delivers high-efficiency, low-I_Q buck converters targeting space-constrained, EMI-sensitive point-of-load applications where fast transient response and minimal external components are critical.

FAQ

What input voltage range is supported on the AP61302Z6-EVM?

The board accepts 4.2V to 18V DC input via screw terminals or solder pads. It is pre-tested at 12V input per the Quick Start Guide, and absolute maximum rating allows 20V DC (400ms pulse). Input capacitance consists of one 10µF/25V X7R ceramic (C1) and two 0.1µF/50V bypass caps (C4, C6).

Can the output voltage be adjusted, and how?

Yes - output voltage is set by the R1/R2 feedback divider. The board ships with R1 = 52.3kΩ and R2 = 10kΩ for 5V. To change output, replace R1 per Table 1 in the datasheet (e.g., 31.6kΩ for 3.3V); R2 remains fixed at 10kΩ. No PCB modification is needed - both resistors are 0603 footprints with accessible pads.

Does the AP61302Z6-EVM include thermal monitoring or overtemperature protection?

No - the evaluation board itself has no onboard temperature sensor or thermal shutdown circuitry. However, the AP62301 IC embedded on the board includes internal thermal shutdown (TJ > +150°C) and cycle-by-cycle current limiting. Board-level thermal performance is verified up to 3A continuous load at +25°C ambient with no heatsink or airflow.

What is the purpose of JH4–JH7 test points on the board?

JH4–JH7 are 0.094" turret-style test points providing low-inductance access to VIN, EN, SW, and FB nodes. They allow oscilloscope probing of switching waveforms (SW), enable logic levels (EN), input rail stability (VIN), and feedback node dynamics (FB) without soldering or ground-loop interference - critical for EMI and loop-stability analysis.