DESCRIPTION
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.
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.

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.

APPLICATIONS
• 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 Distributed Power Supplies.