The HIP6019B 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.

Features

• Provides 4 Regulated Voltages

- Microprocessor Core, I/O, Clock Chip and GTL Bus

• Drives N-Channel MOSFETs

• Operates from +5V and +12V Inputs

• Simple Single-Loop Control Designs

- Voltage-Mode PWM Control

• Fast Transient Response

- High-Bandwidth Error Amplifiers

- Full 0 to 100 Duty Ratios

• Excellent Output Voltage Regulation

- Core PWM Output: ±1 Over Temperature

- I/O PWM Output: ±2 Over Temperature

- Other Outputs: ±2.5 Over Temperature

• TTL-Compatible 5-Bit Digital-to-Analog Core Output Voltage Selection

- Wide Range . . . . . . . . . . . . . . . . . . . 1.3VDC to 3.5VDC

- 0.1V Steps . . . . . . . . . . . . . . . . . . . . 2.1VDC to 3.5VDC

- 0.05V Steps . . . . . . . . . . . . . . . . . . 1.3VDC to 2.05VDC

• Power-Good Output Voltage Monitor

• Microprocessor Core Voltage Protection Against Shorted MOSFET

• Over-Voltage and Over-Current Fault Monitors

- Does Not Require Extra Current Sensing Element, Uses MOSFET’s rDS(ON)

• Small Converter Size

- Constant Frequency Operation

- 200kHz Free-Running Oscillator; Programmable from 50kHz to 1MHz

• Pb-Free Available (RoHS Compliant)

Applications

• Full Motherboard Power Regulation for Computers

• Low-Voltage Distributed Power Supplies