The HIP6019 provides the power control and protection for four output voltages in high-performance microprocessor and computer applications. The IC integrates two PWM controllers, a linear regulator and a linear controller as well as the monitoring and protection functions into a single 28 lead SOIC package. One PWM controller regulates the microprocessor core voltage with a synchronous-rectified buck converter, while the second PWM controller supplies the computer's 3.3V power with a standard buck converter. The linear controller regulates power for the GTL bus and the linear regulator provides power for the clock driver circuits. The HIP6019 includes an Intel-compatible, TTL 5-input digitalto-analog converter (DAC) that adjusts the core PWM output voltage from 2.1VDC to 3.5VDC in 0.1V increments and from 1.8VDC to 2.05VDC in 0.05V steps. The precision reference and voltage-mode control provide 1% static regulation. The second PWM controller is user-adjustable for output levels between 3.0V and 3.5V with 2% accuracy. The adjustable linear regulator uses an internal pass device to provide 2.5V 2.5%. The adjustable linear controller drives an external NChannel MOSFET to provide 1.5V 2.5%. The HIP6019 monitors all the output voltages. A single Power Good signal is issued when the core is within 10% of the DAC setting and the other levels are above their under- voltage levels. Additional built-in over-voltage protection for the core output uses the lower MOSFET to prevent output voltages above 115% of the DAC setting. The PWM controller's overcurrent functions monitor the output current by sensing the voltage drop across the upper MOSFET's rDS(ON), eliminating the need for a current sensing resistor.