ST PM6680TR

控制器，笔记本电脑电源系统6V ~ 28V0.9V ~ 5.5V

Overview

PM6680TR is a dual step-down controller specifically designed to provide extremely high efficiency conversion, with lossless current sensing technique. The constant on-time architecture assures fast load transient response and the embedded voltage feed-forward provides nearly constant switching frequency operation. An embedded integrator control loop compensates the DC voltage error due to the output ripple. Pulse skipping technique increases efficiency at very light load. Moreover a minimum switching frequency of 33kHz is selectable to avoid audio noise issues. The PM6680TR provides a selectable switching frequency, allowing three different values of switching frequencies for the two switching sections. The output voltages OUT1 and OUT2 can be adjusted from 0.9 V to 5.5 V and from 0.9 V to 3.3 V respectively.

Features

Embedded in the VFQFPN-32 package

Extremely high-efficiency conversion

Constant on-time architecture

Embedded voltage feed-forward

6 V to 28 V input voltage range

Applications

Notebook computers

Tablet PC or slates

Mobile system power supply

3-4 cells Li+ battery-powered devices