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General Description

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.

Features

? Ultra-High Efficiency

? No Current-Sense Resistor (Lossless ILIMIT)

? Quick-PWM with 100ns Load-Step Response

? ¡À1 VOUTAccuracy over Line and Load

? 4-Bit On-Board DAC (MAX1710)

? 5-Bit On-Board DAC (MAX1711/MAX1712)

? 0.925V to 2V Output Adjust Range(MAX1711/MAX1712)

? 2V to 28V Battery Input Range

? 200/300/400/550kHz Switching Frequency

? Remote GND and VOUTSensing

? Over/Undervoltage Protection

? 1.7ms Digital Soft-Start

? Drive Large Synchronous-Rectifier FETs

? 2V ¡À1 Reference Output

? Power-Good Indicator

? Small 24-Pin QSOP Package

Applications

??? Notebook Computers

??? Docking Stations

??? CPU Core DC-DC Converters

??? Single-Stage (BATT to VCORE)Converters

??? Two-Stage (+5V to VCORE) Converters