AP65455中文资料buck-converter数据手册Diodes规格书

描述 Description

The AP65455 is an adaptive constant on-time mode synchronous buck converter providing high efficiency, excellent transient response and high DC output accuracy for low-voltage regulation in digital TV and monitor. The constant-on-time control scheme handles wide input/output voltage ratios and provides low external component count. The internal proprietary circuit enables the device to adopt both low equivalent series resistance (ESR) output capacitors, such as SP-CAP or POSCAP and ultra-low ESR ceramic capacitors. The AP65455 features programmable soft-start, UVLO, OTP, high voltage tolerance EN pin, Power Good and OCP to protect the circuit. This IC is available in DFN3030-10 package.

特性 Features

Fixed Frequency Emulated Constant On-time Control
Good Stability Independent of the Output Capacitor ESR
Fast Load Transient Response
Synchronous Rectification: 90mΩ Internal High-side Switch and 57mΩ Internal Low-side Switch
Wide Input Voltage Range: 4.5V to 18V
Output Voltage Range: 0.76V to 6V
4A Continuous Output Current
650kHz Switching Frequency
Built-in Over Current Limit
Support Power Good Pin
High Voltage Tolerance EN pin
Built-in Thermal Shutdown Protection
Programmable Soft-start
Pre-biased Start-up

应用 Application

Point of Load power

简介

AP65455属于集成电路（IC）的稳压器-DC-DC开关稳压器。由制造生产的AP65455稳压器 - DC-DC 开关稳压器DC-DC 开关稳压器 PMIC（电源管理集成电路）产品族中的产品是元器件级设备，用于需要稳定 DC 输入电压和/或将其转换为不同幅度的输出电压的应用。这些器件与称为“控制器”PMIC 的类似产品的区别在于集成了主开关元件，设备提供的电力会通过该元件。