L6911A

`OPERATING SUPPLY VOLTAGE FROM 5V TO 12V
`TTL-COMPATIBLE 5BIT PROGRAMMABLE OUTPUT FROM:
-1.8V TO 2.05V WITH 0.05V BINARYSTEPS
-2.1V TO 3.5V WITH 0.1V BINARY STEPS
`VOLTAGEMODE PWMCONTROL
`EXCELLENT OUTPUT ACCURACY +/-1% OVERLINE,ANDTEMPERATUREVARIATIONS
`HIGH PRECISION INTERNAL REFERENCE DIGITALLY TRIMMED
`VERY FAST LOAD TRANSIENT 0% TO100%
`DUTY CYCLE
`POWERGOOD OUTPUT
`OVERVOLTAGE PROTECTION
`OVERCURRENT PROTECTION REALISED USING THE MOSFET's R_DSon
`OPERATING FREQUENCY FROM 50KHz TO 1MHz
`MEETS INTEL PENTIUM II SPECIFICATION
`DISABLEFUNCTION

·POWER SUPPLY FOR ADVANCED MICROPROCESSORSUPPLIES
·POWER SUPPLY FOR PENTIUM II INTEL PROCESSORS

The L6911A is a power supply controller specifically designed to provide a high performance DC/DC conversion for Pentium II Microprocessors. A precise 5 bit digital to analog converter (DAC) allows to adjust the output voltage from 1.8V to 2.05V with 0.05V binary steps and from 2.1V to 3.5V with 0.1V binary steps. The high precision internal reference, digitally trimmed, assures the selected output voltage to within +/-1%. Thanks to the window comparator system, the deviceprovides excellent  oad transient performance. The high peak current gate drive affords tohave fast switching to the external power mos, performing an high efficiency. The L6911A assures a fast protection against load overvoltage and load overcurrent. An external SCR is triggered to crowbar the input supply in case of overvoltage. In case of output short circuit the soft start capacitor is discharged and the system works in hiccup mode.