PM6670 - STMicroelectronics

PM6670 Complete DDR2/3 memory power supply controller

The device PM6670 is a complete DDR2/3 power supply regulator designed to meet JEDEC specifications. It integrates a Constant On-Time (C.O.T.) buck controller, a 2Apk sink/source Low Drop Out regulator and a 15mA low noise buffered reference. The C.O.T. architecture assures fast transient response supporting both electrolytic and ceramic output capacitors. A.

Features

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  – 4.5V to 28V input voltage range
  – 0.9V, ±1% voltage reference
  – 1.8V (DDR2) or 1.5V (DDR3) fixed output voltages
  – 0.9V to 2.6V adjustable output voltage
  – 1.237V ±1% reference voltage available
  – Very fast load transient response using constant on-time control loop
  – No RSENSE current sensing using low side MOSFET’s RDS(ON)
  – Negative current limit
  – Latched OVP and UVP
  – Soft start internally fixed at 3ms
  – Selectable pulse skipping at light load
  – Selectable No-Audible (33KHz) pulse skip mode
  – Ceramic output capacitors supported
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