AP64500数据手册集成电路（IC）的稳压器-DC-DC开关稳压器规格书PDF

描述 Description

The AP64500 is a 5A, synchronous buck converter with a wide input voltage range of 3.8V to 40V. The device fully integrates a 45mΩ highside power MOSFET and a 20mΩ low-side power MOSFET to provide high-efficiency step-down DC-DC conversion.

The AP64500 device is easily used by minimizing the externalcomponent count due to its adoption of peak current mode control.

The AP64500 design is optimized for Electromagnetic Interference (EMI) reduction. The device has a proprietary gate driver scheme to resist switching node ringing without sacrificing MOSFET turn-on and turn-off times, which reduces high-frequency radiated EMI noise caused by MOSFET switching. AP64500 also features Frequency Spread Spectrum (FSS) with a switching frequency jitter of ±6%, which reduces EMI by not allowing emitted energy to stay in any one frequency for a significant period of time.

The device is available in an SO-8EP package.

特性 Features

•VIN 3.8V to 40V
•5A Continuous Output Current
•0.8V ± 1% Reference Voltage
•25μA Low Quiescent Current (Pulse Frequency Modulation)
•Programmable Switching Frequency: 100kHz to 2.2MHz
•External Clock Synchronization: 100kHz to 2.2MHz
•Up to 85% Efficiency at 5mA Light Load
•Proprietary Gate Driver Design for Best EMI Reduction
•Frequency Spread Spectrum (FSS) to Reduce EMI
•Low-Dropout (LDO) Mode
•Precision Enable Threshold to Adjust UVLO
•Protection Circuitry•Undervoltage Lockout (UVLO)
•Output Overvoltage Protection (OVP)
•Cycle-by-Cycle Peak Current Limit
•Thermal Shutdown

•Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
•Halogen and Antimony Free. “Green” Device (Note 3)

应用 Application

• 5V, 12V, and 24V Distributed Power Bus Supplies

• Power Tools and Laser Printers

• White Goods and Small Home Appliances

• Home Audio

• Network Systems

• Consumer Electronics

• General Purpose Point of Load