HIP6017B

Features:

• Provides 3 Regulated Voltages
        - Microprocessor Core, Clock and GTL Power
• Linear Controller Drives Either N-Channel MOSFETs or Bipolar Transistors
• Operates from +3.3V, +5V and +12V Inputs
• Simple Single-Loop PWM Control Design
        - Voltage-Mode Control
• Fast Transient Response
        - High-Bandwidth Error Amplifier
        - Full 0% to 100% Duty Ratios
• Excellent Output Voltage Regulation
        - Core PWM Output: ±1% 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 from 2.1VDC to 3.5VDC
        - 0.05V Steps from 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 over 1MHz


Application

• Full Motherboard Power Regulation for Computers
• Low-Voltage Distributed Power Supplies


Pinout




Specifications

Supply Voltage, V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +15V
PGOOD, RT, FAULT, and GATE Voltage . . .GND - 0.3V to V_CC + 0.3V
Input, Output or I/O Voltage . . . . . . . . . . . . . . . . . GND -0.3V to 7V


Description

The HIP6017B provides the power control and protection for three output voltages in high-performance microprocessor and computer applications. The HIP6017B IC integrates a PWM controller, a linear regulator and a linear controller as well as the monitoring and protection functions into a single 28 lead SOIC package. The PWM controller regulates the microprocessor core voltage with a synchronous-rectified buck converter. The linear controller regulates power for the GTL bus and the linear regulator provides power for the clock driver circuits.

The HIP6017B includes an Intel-compatible, TTL 5-input digital-to-analog converter (DAC) that adjusts the core PWM output voltage from 2.1VDC to 3.5VDC in 0.1V increments and from 1.3VDC to 2.05VDC in 0.05V steps. The precision reference and voltage-mode control provide ±1% static regulation. The linear regulator in HIP6017B uses an internal pass device to provide 2.5V ±2.5%. The linear controller drives an external N-Channel MOSFET to provide 1.5V ±2.5%.

The HIP6017B 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 undervoltage 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 overcurrent function monitors the output current by using the voltage drop across the upper MOSFET's rDS(ON), eliminating the need for a current sensing resistor.