RP6101

Preliminary RP6101 5V/12V Synchronous Buck PWM DC-DC Controller General Description The RP6101 is a high efficiency synchronous buck PWM controllers that generate logic-supply voltages in PC based systems. These high performance , single output devices include internal soft-start, frequency compensation networks and integrates all of the control, output adjustment, monitoring and protection functions into a single package. The device operating at fixed 300kHz frequency provides an optimum compromise between efficiency, external component size, and cost. Adjustable over-current protection (OCP) monitors the voltage drop across the RDS(ON) of the lower MOSFET for synchronous buck PWM DC-DC controller. The overcurrent function cycles the soft-start in 4-times hiccup mode to provide fault protection, and in an always hiccup mode for under-voltage protection. Ordering Information RP6101 Package Type S : SOP-8 Operating Temperature Range G : Green (Halogen Free with Commer- cial Standard) Features z Operating with 5V or 12V Supply Voltage z Drives All Low Cost N-MOSFETs z Voltage Mode PWM Control z 300kHz Fixed Frequency Oscillator z Fast Transient Response : ` High-Speed GM Amplifier ` Full 0 to 100% Duty Ratio z Internal Soft-Start z Adaptive Non-Overlapping Gate Driver z Over-Current Fault Monitor on MOSFET, No Current Sense Resistor Required z Full-Time Over Voltage Protection z RoHS Compliant and Halogen Free Applications z Graphic Card z Motherboard, Desktop Servers z ...