Diodes Incorporated AP61100QZ6-EVM

Overview

AP61100QZ6-EVM from Diodes Incorporated is an evaluation board for the AP61100Q 1A synchronous buck converter, supporting 2.3V–5.5V input and programmable 0.6V–5.5V output. It integrates 120mΩ/80mΩ MOSFETs, uses constant-on-time (COT) control, operates at 2.2MHz, and delivers ultralow 14µA quiescent current in PFM mode-designed for point-of-load regulation in space-constrained consumer and embedded systems.

For engineers reviewing the AP61100QZ6-EVM datasheet, AP61100QZ6-EVM pinout, AP61100QZ6-EVM application, or AP61100QZ6-EVM equivalent, this board enables rapid validation of efficiency, transient response, output ripple, and EN-controlled PWM/PFM mode switching under real load conditions up to 1A.

Technical Context

The AP61100QZ6-EVM implements the AP61100Q IC in a SOT563 package with fixed 1.8V output (R1=200kΩ, R2=100kΩ), using a 1.0µH Panasonic ETQP3M1R0KVP inductor and dual 10µF X8L ceramic capacitors. It supports jumper-selectable enable (H/L) and provides test points for VIN, VOUT, SW, and EN signals.

Designed for fast transient response and low output voltage ripple, the board leverages COT control architecture and includes UVLO, VIN OVP, peak/valley current limiting, and thermal shutdown-verified per Diodes' recommended operating conditions (–40°C to +125°C ambient).

Key Specifications

Availability

AP61100QZ6-EVM is available at Aetrix Electronics and suitable for FPGA power sequencing, network camera PoL regulation, wireless router DC-DC conversion, and white goods microcontroller supply design requiring stable component supply and rapid prototyping capability.

Supply support for AP61100QZ6-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-efficiency power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The AP61100Q product line delivers compact, high-frequency synchronous buck converters targeting space-constrained, battery-sensitive applications such as portable electronics and always-on IoT endpoints.

FAQ

What input voltage range does the AP61100QZ6-EVM support?

The board supports 2.3V to 5.5V DC input, aligned with the AP61100Q IC's absolute maximum and recommended operating ranges. It is verified for stable 1.8V output across this span, including at minimum 2.3V input with full 1A load and thermal margin.

How is output voltage set on this evaluation board?

The AP61100QZ6-EVM is factory-configured for 1.8V output using a precision 200kΩ/100kΩ resistor divider (1% tolerance) connected to the FB pin. The reference voltage is 0.6V ±2%, yielding VOUT = 0.6V × (1 + 200kΩ/100kΩ) = 1.8V.

Can the AP61100QZ6-EVM operate in both PFM and PWM modes?

Yes - mode selection is controlled via the EN pin voltage relative to VIN. When VIN – VEN < 200mV, it enters PFM for ultralow IQ (14µA); when VIN – VEN > 200mV, it forces continuous PWM regardless of load, enabling predictable 2.2MHz switching under all conditions.

What protection features are implemented and verified on this board?

The board demonstrates integrated protections from the AP61100Q IC: undervoltage lockout (UVLO), VIN overvoltage protection (OVP), peak and valley current limiting, and thermal shutdown. These are confirmed through stress testing per Diodes' absolute maximum ratings and functional block diagram behavior.