L6911D

· OPERATING SUPPLY IC VOLTAGE FROM 5V TO 12V BUSES
· UP TO 1.3A GATE CURRENT CAPABILITY
· TTL-COMPATIBLE 5 BIT PROGRAMMABLE OUTPUT COMPLIANT WITH VRM 9.0 : 1.100V TO 1.850V WITH 0.025V BINARY STEPS
· VOLTAGE MODE PWM CONTROL
· EXCELLENT OUTPUT ACCURACY: ±1% OVER LINE AND TEMPERATURE VARIATIONS
· VERY FAST LOAD TRANSIENT RESPONSE: FROM 0% TO 100% DUTY CYCLE
· POWER GOOD OUTPUT VOLTAGE
· OVERVOLTAGE PROTECTION AND MONITOR
· OVERCURRENT PROTECTION REALIZED USING THE UPPER MOSFET'S R_dsON
· 200KHz INTERNAL OSCILLATOR
· OSCILLATOR EXTERNALLY ADJUSTABLE FROM 50KHz TO 1MHz
· SOFT START AND INHIBIT FUNCTIONS

L6911D is a power supply controller specifically designed to provide a high performance DC/DC conversion
for high current microprocessors. A precise 5-bit digital to analog converter (DAC) allows adjusting the output voltage from 1.30V to 2.05V with 50mV binary steps and from 2.10V to 3.50V with 100mV binary steps.

The high precision internal reference assures the selected output voltage to be within ±1%. The high peak current gate drive affords to have fast switching to the external power mos providing low switching losses.
L6911D assures a fast protection against load overcurrent and load overvoltage. An external SCR is triggered to crowbar the input supply in case of hard over-voltage. An internal crowbar is also provided turning on the low side mosfet as long as the overvoltage is detected. In case of over-current detection, the soft start capacitor is discharged and the system works in HICCUP mode.