AN2808完整的DDR2 / 3内存电源控制器

AN2808完整的DDR2 / 3内存电源控制器

AN2808
Application note

Complete DDR2/3 memory power supply controller

Introduction
The PM6670S device is a complete DDR2/3 power supply regulator for portable
applications designed to meet JEDEC specifications. It integrates a constant on-time (COT)
buck controller, a 2 Apk sink/source low dropout regulator (LDO) and a 15 mA low noise
buffered reference.
The COT architecture ensures a fast transient response supporting both polymeric and
ceramic output capacitors. An embedded integrator control loop compensates the DC
voltage error cau