High-Speed / Digitally Adjusted Step-Down Controllers
19-4781; Rev 1; 7/00
KIT ATION EVALU E L B A AVAIL
High-Speed, Digitally Adjusted Step-Down Controllers for Notebook C...
Description
19-4781; Rev 1; 7/00
KIT ATION EVALU E L B A AVAIL
High-Speed, Digitally Adjusted Step-Down Controllers for Notebook CPUs
General Description Features
o Ultra-High Efficiency o No Current-Sense Resistor (Lossless ILIMIT) o Quick-PWM with 100ns Load-Step Response o ±1% VOUT Accuracy over Line and Load o 4-Bit On-Board DAC (MAX1710) o 5-Bit On-Board DAC (MAX1711/MAX1712) o 0.925V to 2V Output Adjust Range (MAX1711/MAX1712) o 2V to 28V Battery Input Range o 200/300/400/550kHz Switching Frequency o Remote GND and VOUT Sensing o Over/Undervoltage Protection o 1.7ms Digital Soft-Start o Drive Large Synchronous-Rectifier FETs o 2V ±1% Reference Output o Power-Good Indicator o Small 24-Pin QSOP Package
MAX1710/MAX1711/MAX1712
The MAX1710/MAX1711 step-down controllers are intended for core CPU DC-DC converters in notebook computers. They feature a triple-threat combination of ultra-fast transient response, high DC accuracy, and 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. High DC precision is ensured by a 2-wire remote-sensing scheme that compensates for voltage drops in both the ground bus and supply rail. An on-board, digital-toanalog converter (DAC) sets the output voltage in compliance with Mobile Pentium I...
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