Silicon Standard SS6580
The SS6580 is a high-power, high-efficiency voltage-mode switching regulator controller for motherboard VI/O power supply applications. Designed to drive an N-channel MOSFET in a standard buck topology, the SS6580 features a high voltage CMOS output driver with short-circuit protection in an 8-pin package. The 200 KHz switching frequency allows the use of small external components while maintaining high conversion efficiency.FEATURES
Operating Voltage up to 15V. Simple Voltage-Mode PWM Control. Fast Transient Response. 2V and 1.3V ± 2% Feedback Voltage Reference Options. Adjustable Current Limit without External Sense Resistors. 200 KHz Switching Oscillator. Short-Circuit Protection with Low Short-Circuit Output Current. Low Shutdown Current Built-in Soft Start. nDESCRIPTION
An external 4-bit Digital-to-Analog Converter (DAC) can be used along with the SS6580 to adjust the output voltage from 2.0V to 3.5V in 0.1V increments. Table 1 on the following page specifies the corresponding output voltage for 16 combinations of DAC inputs as shown in the typical application circuit. The 11MHz bandwidth and the 6V/µS slew rate of the error amplifier ensure high converter bandwidth and fast transient response. The SS6580 provides both adjustable l l l l l n l l l lAPPLICATIONS
Power Supply for Motherboard VGTL (1.5V Output) Power Supply for Motherboard VI/O. High-Power 5V to 3.xV DC/DC Regulators. Low-Voltage Distr...