www.fairchildsemi.com
FAN5090
Two Phase Interleaved Synchronous Buck Converter for VRM 9.x Applications
Features
• Prog...
www.fairchildsemi.com
FAN5090
Two Phase Interleaved Synchronous Buck Converter for VRM 9.x Applications
Features
Programmable output from 1.10V to 1.85V in 25mV steps using an integrated 5-bit DAC Two interleaved synchronous phases for maximum performance 100nsec transient response time Built-in current sharing between phases Remote sense Programmable Active Droop (Voltage Positioning) Programmable switching frequency from 100KHz to 300KHz per phase 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 12V operation Overcurrent protection using MOSFET sensing 24 pin TSSOP package
Description
The FAN5090 is a synchronous two-phase DC-DC controller IC which provides a highly accurate, programmable output voltage for VRM 9.x processors. Two interleaved synchronous buck
regulator phases 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 FAN5090 features Programmable Active Droop for 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 FAN5090 uses a 5-bit D/A converter to program the output voltage from 1.10V to 1.85V in 25mV steps with an accuracy of 1%. The FAN5090 uses...