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Step-down controller tailored for Nvidia GPUs

Posted: 21 Sep 2009 ?? ?Print Version ?Bookmark and Share

Keywords:controller? GPU? converter?

MAX17409 controller

From Maxim Integrated Products comes a single-phase, step-down controller for powering Nvidia GPUs.

The MAX17409's active voltage positioning dynamically lowers the output voltage in response to the load current, reducing output capacitance requirements and power dissipation. The load current is sensed at the MAX17409's output to minimize noise sensitivity, and can be sensed using a current-sense resistor or the DC resistance of the inductor. The MAX17409 is well-suited for Nvidia GPU core supplies, notebooks/desktops/servers, or as a general voltage-positioned step-down converter.

The switching frequency is adjustable from 200kHz to 600kHz, allowing designers to optimize for efficiency or component cost/size. The device also features overvoltage, undervoltage and thermal-fault protection circuitry.

The MAX17409 is available in a space-saving, 4mm x 4mm, 28-pin TQFN package with an exposed backside pad. The device is fully specified over the -40 to +105 temperature range. Prices start at $4.36 (1,000-up, FOB USA).

- Paul Buckley
Power Management DesignLine Europe

For application notes on step-down controllers click here.

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