百伏耐压低静态功耗电源方案(MP4581),带来的启示采用标准ESP8封装的芯片能够满足高压和低静态功耗的需求,满足汽车电子相关的应用需求。
The MP4581 is a high-efficiency, synchronous step-down converter with integrated power MOSFETs. It provides 0.8A of output current (IOUT) in a buck topology from an input power supply of up to 100V.
The MP4581 features constant-on-time (COT) control, which provides fast transient response and facilitates loop stabilization. The configurable operation frequency can be set between 100kHz to 1MHz via an external resistor.The MP4581 supports high-efficiency pulse-skip mode (PSM) while operating under light-load conditions. The valley current limit circuits protect against overload and short-circuit conditions.
产品特性和优势
MP4581的性能如下,确实是非常优秀的一款芯片:
输入电压范围:10V - 100V
输出电压范围:1V 至 -30V
最大90%占空比
625mΩ / 380mΩ 内部 MSOFETs
恒定导通时间(COT)控制模式
可调频率:100kHz 至 1MHz
内部软启动和环路补偿功能
带打嗝(Hiccup)保护的过流保护(OCP)和短路保护(SCP)
轻载高效率模式(PSM)
采用 SOIC8EP 封装