FAN5066

www.fairchildsemi.com FAN5066 Ultra Low Voltage Synchronous DC-DC Controller Features Output adjustable from 400mV to 3.5V Synchronous Rectification Adjustable operation from 80KHz to 1MHz Integrated Power Good and Enable functions Overvoltage protection Overcurrent protection Drives N-channel MOSFETs 20 pin SOIC or TSSOP package Description The FAN5066 is a synchronous mode DC-DC controller IC which provides an adjustable output voltage for ultra-low voltage applications, down to 400mV. The FAN5066 uses a high level of integration to deliver load currents in excess of 19A from a 5V source with minimal external circuitry. Synchronous-mode operation offers optimum efficiency over the entire output voltage range, and the internal oscillator can be programmed from 80KHz to 1MHz for additional flexibility in choosing external components. The FAN5066 also offers integrated functions including a four-bit DAC-controlled reference, Power Good, Output Enable, over-voltage protection and current limiting. Applications Power supply DDR SDRAM VTT Power Supply HSTL Power Supply for ASICs Adjustable ultra-low voltage step-down power supply Block Diagram +12V FAN5066 1 – + +5V 5 4 OSC – + 13 12 – + – + DIGITAL CONTROL +5V 7 9 VO CNTRL VREF 16 20 4-BIT DAC 19 18 17 8 1.24V REFERENCE POWER GOOD 2 3 PWRGD VID2 VID4 VID1 VID3 ENABLE PRELIMINARY INFORMATION describes products that are not in full production at the time of printing. Specifications are ...