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MAX8720

Maxim
Part Number MAX8720
Manufacturer Maxim
Description Dynamically Adjustable 6-Bit VID Step-Down Controller
Published Apr 21, 2010
Detailed Description 19-3319; Rev 1; 8/04 KIT ATION EVALU E L B A IL AVA www.DataSheet4U.com Dynamically Adjustable 6-Bit VID Step-Down Co...
Datasheet PDF File MAX8720 PDF File

MAX8720
MAX8720


Overview
19-3319; Rev 1; 8/04 KIT ATION EVALU E L B A IL AVA www.
DataSheet4U.
com Dynamically Adjustable 6-Bit VID Step-Down Controller 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 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.
The output voltage can be dynamically adjusted through the 6-bit digital-to-analog converter (DAC) over a 0.
275V to 1.
850V range in 25mV steps.
The MAX8720 has independent four-level logic inputs for setting the suspend voltage (S0-S1).
Precision slew-rate control provides “just-in-time” arrival at the new DAC setting, minimizing surge currents to and from the battery.
The internal DAC of the MAX8720 is synchronized to the slew-rate clock for improved operation under aggressive power management of newer chipsets and operating systems that can make incomplete mode transitions.
Remote feedback and ground-sense inputs allow easy compensation for IR drops in PC board traces.
Single-stage buck conversion allows these devices to directly step down high-voltage batte...


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