General Description
   The MAX1917 provides a complete power-management solution for DDR memory. It contains a synchronous buck controller and an amplifier to generate 1/2VDDR voltage for VTT and VTTR. The VTT and VTTR voltages are maintained within 1% of 1/2VDDR. The controller operates in synchronous rectification mode to ensure balanced current sourcing and sinking capability of up to 25A. With a shutdown current of less than 5µA, the MAX1917 is the best choice for low-power notebook applications, as well as servers and desktop computers. An all N-FET design optimizes efficiency.

FEATUREs
✦ 25A Sourcing and Sinking Current
✦ Automatically Sets VTT to 1/2VDDR
✦ VTT and VTTR Within 1% of 1/2VDDR
✦ Smallest Output Capacitors
✦ 4.5V to 14V (or 28V with Resistor-Divider) Input
   Voltage Range
✦ 1.5V to 3.6V Input DDR Range
✦ 200kHz/300kHz/400kHz/550kHz Preset Switching
   Frequencies
✦ Variable Switching Frequency of Up to 1MHz
✦ Overcurrent Protection Without Current-Sense
   Resistor
✦ Internal Soft-Start
✦ VTTR Reference Sources and Sinks Up to 25mA
✦ Quick-PWM Control for Fastest Loop Response
✦ Up to 96% Efficiency
✦ 16-Pin QSOP Package

APPLICATIONs
   DDR Memory Power Supply
   Processor or DSP Core Supply
   AGTL Bus Termination Supply
   Notebook Computers
   Desktop Computers Storage
   Networking Systems