Introduction
The PM6670AS 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 A peak sink/source low dropout regulator and a 15 mA low-noise buffered reference.

The COT architecture assures fast transient response supporting both polymeric and ceramic output capacitors. An embedded integrator control loop compensates the DC voltage error due to the output ripple. The 2 A peak sink/source linear regulator provides the memory termination voltage with fast load transient response.

The device is fully compliant with system sleep states S3 and S4/S5, setting the LDO output to high impedance in suspend-to-RAM state and performing the tracking discharge of all outputs in suspend-to-disk state.