General Description
The MAX8720 step-down controller is intended for core CPU DC-DC converters in notebook computers. It features a dynamically adjustable output, ultra-fast transient response, high DC accuracy, and the high efficiency needed for leading-edge CPU core power supplies. Maxim’s proprietary Quick-PWM™ quick-response, 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 relatively constant switching frequency.

Features
♦ Quick-PWM Architecture
♦ ±1% VOUT Accuracy Over Line and Load
♦ 6-Bit On-Board DAC with Input Muxes
♦ Precision-Adjustable VOUT Slew Control
♦ 0.275V to 1.850V Output Adjust Range
♦ Remote Feedback and Ground Sense
♦ Supports Voltage-Positioned Applications
♦ 2V to 28V Battery Input Range
♦ 200kHz/300kHz/550kHz/1000kHz Switching Frequency
♦ Over/Undervoltage Protection
♦ Drives Large Synchronous-Rectifier FETs
♦ 800µA (typ) ICC Supply Current
♦ 10µA (typ) Shutdown Supply Current
♦ 2V ±0.75% Reference Output
♦ PGOOD Blanking During Transition

Applications
    CPU Core Supply Converters
    GPU Core Supply Converters
    Notebook and Subnotebook Computers