Maxim MAX17017 UMPC四输出电源控制方案
Maxim公司的MAX17017是低功耗超移动手提电脑(UMPC)的确四输出电源控制器,采用固定频率和恒流模式控制,输入电压5.5V到28V(降压)或3-5V(升压)有四个独立的稳压器:一个升压或降压转换器,一个5A峰-峰值升降压稳压器, 一个3A峰-峰值升降压稳压器,以及一个2A源/吸线性稳压器.主要用于UMPC,手提游戏机,笔记本和亚笔记本电脑,PDA和移动通信器以及以1-4节Li+电池为能源的设备.本文介绍了MAX17017主要特性,方框图和标准应用电路.
The MAX17017 is a quad-output controller for ultramobile portable computers (UMPCs) that rely on a lowpower architecture. The MAX17017 provides a compact, low-cost controller capable of providing four independent regulators—a main stage, a 3AP-P internal stepdown, a 5AP-P internal step-down, and a 2A source/sink linear regulator.
The main regulator can be configured as either a stepdown converter (for 2 to 4 Li+ cell applications) or as a step-up converter (for 1 Li+ cell applications). The internal switching regulators include 5V synchronous MOSFETs that can be powered directly from a single Li+ cell or from the main 3.3V/5V power stages. Finally, the linear regulator is capable of sourcing and sinking 2A to support DDR termination requirements or to generate a fixed output voltage.
..
