www.fairchildsemi.com
FAN5091
Two Slice Interleaved Synchronous Buck Converter
Features
• Programmable output from 1.10...
www.fairchildsemi.com
FAN5091
Two Slice Interleaved Synchronous Buck Converter
Features
Programmable output from 1.10V to 1.85V in 25mV steps using an integrated 5-bit DAC Two interleaved synchronous slices for maximum performance 100nsec response time Built-in current sharing between slices Remote sense Programmable Active Droop (Voltage Positioning) Programmable frequency from 200KHz to 2MHz Adaptive delay gate switching Integrated high-current gate drivers Integrated Power Good, OV, UV, Enable/Soft Start functions Drives N-channel MOSFETs Operation optimized for 5V operation High efficiency mode (E*) at light load Overcurrent protection using MOSFET sensing 24 pin TSSOP package
Description
The FAN5091 is a synchronous multi-slice DC-DC controller IC which provides a highly accurate, programmable output voltage for all high-performance processors. Two interleaved synchronous buck
regulator slices with built-in current sharing operate 180° out of phase to provide the fast transient response needed to satisfy high current applications while minimizing external components. The FAN5091 features remote voltage sensing and Programmable Active Droop for 100nsec converter transient response with minimum output capacitance. It has integrated high-current gate drivers, with adaptive delay gate switching, eliminating the need for external drive devices. The FAN5091 uses a 5-bit D/A converter to program the output voltage from 1.10V to 1.85V in 25mV ste...