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Step-Down Controller – features dynamically adjustable output

Maxim introduced the MAX8720 step-down controller, featuring dynamically adjustable output, ultra-fast transient response, high DC accuracy, and the high efficiency required for leading-edge, CPU-core power supplies.

Maxim's proprietary Quick-PWM , constant on-time, pulse-width modulation (PWM) control scheme handles wide-input/output voltage ratios with ease. The Quick-PWM control scheme also provides 100ns “instant-on” response to load transients, while maintaining a constant switching frequency. Output voltage is dynamically adjusted through the 6-bit DAC over a 0.275V to 1.850V range in 25mV steps. Independent, four-level logic inputs set the suspend voltage (S0-S1).
The internal DAC is synchronized to the slew-rate clock for improved operation under the aggressive power management of newer chipsets and operating systems that can make incomplete mode transitions. The MAX8720 is available in a 28-pin QSOP or 36-pin TQFN package, and is screened for the extended temperature range (-40C to +85C). Prices start at $4.76 (1000-up, FOB USA). An evaluation kit is available with recommended external components to speed designs. Maxim Integrated Products Ltd , www.maxim-ic.com

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