DYNAMICALLY ADJUSTABLE SYNCHRONOUS STEP-DOWN CONTROLLER FOR INTEL (IMVPII) NOTEBOOK CPUs
SUNNYVALE, CA-February 1, 2001-Maxim Integrated Products introduces the MAX1718, a buck controller that features a dynamically adjustable output, ultra-fast transient response, high DC accuracy, and high efficiency needed for the 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 constant switching frequency.
The output voltage is dynamically adjusted via the 5-bit DAC inputs over a range of 0.6V to 1.75V. Output slew rate control minimizes battery and inductor surge currents. With this precision circuit, VOUT slew rate can be tailored to a given application, providing a just-in-time arrival at the new DAC setting.
Another unique feature of the MAX1718 is an internal multiplexer that allows rapid switching between two 5-bit DAC settings with only five digital input pins and can also select a low preset output voltage to support low power processor suspend states.
The MAX1718 is available in a 28-pin QSOP package. All devices are screened for the extended temperature range (-40°C to +85°C). Prices for the MAX1718 start from $4.76 (1000-up, FOB USA). A preassembled MAX1718 EV kit (evaluation kit) is available with recommended external components to reduce design time.
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