1-Phase Quick-PWM GPU Controller

The MAX17409 is a 1-phase Quick-PWM™ Step-down VID power-supply controller for high-performance graph- ics processors. The Quick-PWM control provides instan- taneous response to fast-load current steps. Active voltage positioning reduces power dissipation and bulk output capacitance requirements and allows ideal posi- tioning compensation for tantalum, polymer, or ceramic bulk output capacitors. The MAX17409 is intended for two different notebook processor core applications: either bucking down the bat- tery directly to create the core voltage, or bucking down the +5V system supply. The single-stage conversion method allows this device to directly step down high-volt- age batteries for the highest possible efficiency. Alternatively, 2-stage conversion (stepping down the +5V system supply instead of the battery) at higher switching frequency provides the minimum possible physical size. A slew-rate controller allows controlled transitions between VID codes. A thermistor-based temperature Sensor provides programmable thermal protection. The MAX17409 is available in a 28-pin, 4mm x 4mm TQFN package. By Maxim Integrated Products