General Description

The MAX17409 is a 1-phase Quick-PWM™ step-down VID power-supply controller for high-performance graphics processors. The Quick-PWM control provides instantaneous response to fast-load current steps. Active voltage positioning reduces power dissipation and bulk output capacitance requirements and allows ideal positioning compensation for tantalum, polymer, or ceramic bulk output capacitors.

Features

♦ 1-Phase Quick-PWM Controller

♦ ±6mV VOUT Accuracy Over Line, Load, and

   Temperature

♦ 6-Bit Graphics DAC (12.5mV LSB)

♦ Active Voltage Positioning with Adjustable Gain

♦ Accurate Droop and Current Limit

♦ Remote Output and Ground Sense

♦ Buffered 2V Reference Output for Offsets

♦ Power-Good Window Comparator

♦ Temperature Comparator

♦ Drives Large Synchronous Rectifier FETs

♦ 2V to 26V Power Input Range

♦ Adjustable Switching Frequency (600kHz max)

♦ Output Overvoltage and Undervoltage Protection

♦ Soft-Startup and Soft-Shutdown

♦ Internal Boost Diodes

Applications

   Graphics Core (GPU) Power Supplies

   Voltage-Positioned Step-Down Converters

   2-to-4 Li+ Cells Battery to Processor Core Supply Converters

   Notebooks/Desktops/Servers