DYNAMICALLY ADJUSTABLE, SYNCHRONOUS STEP-DOWN CONTROLLER FOR INTEL'S SPEEDSTEP™ NOTEBOOK CPUs
SUNNYVALE, CA—January 22, 2000—Maxim Integrated Products introduces the MAX1717, a buck controller featuring a dynamically adjustable output, ultra-fast transient response, ±1% DC accuracy, and high efficiency needed for leading-edge CPU core power supplies. Maxim's proprietary Quick-PWM™ constant on-time PWM control scheme handles wide input/output voltage ratios with ease and provides 100ns instant-on response to load transients while maintaining a near-constant switching frequency. The MAX1717 has been optimized for ICs that operate in two or more modes (e.g., CPUs featuring Intel's SpeedStep™ and AMD's Gemini™ technologies).
The output voltage can be dynamically adjusted via the 5-bit DAC inputs over a 0.9V-to-2V range. Output slew rate control minimizes battery and inductor surge currents. With this precision circuit, the VOUT slew rate can be tailored to a given application, providing a just-in-time arrival at the new DAC setting.
A unique feature of the MAX1717 is an internal multiplexer that accepts two 5-bit DAC settings with only five digital input pins.
The MAX1717 is screened for the extended temperature range (-40°C to +85°C) and is available in a 24-pin QSOP package. Prices start from $3.89 (1000-up, FOB USA). A preassembled evaluation kit (MAX1717EVKIT) is available with recommended external components to reduce design time. | 
