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HIP6018B

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HIP6018B

Data Sheet HIP6018B May 1999 File Number 4586.1 [ /Title (HIP60 18B) /Subject (Advan ced PWM and Dual Linear Power Control) /Autho /Keywords (Inter- Corporation, Semiconductor, Intelligent Power, Computer Power, Pentium Power, Pentium II Power, Advanced PWM and Dual Linear Power Control The HIP6018B provides the power control and protection for three output voltages in high-performance microprocessor and computer applications. The IC integrates a PWM controllers, a linear regulator and a linear controller as well as the monitoring and protection functions into a single 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 circuit. The HIP6018B 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 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 HIP6018B 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. Pinout HIP6018B (SOIC) TOP VIEW VCC 1 VID4 2 VID3 3 VID2 4 VID1 5 VID0 6 PGOOD 7 FAULT 8 SS 9 RT 10 FB2 11 VIN2 12 24 UGATE1 23 PHASE1 22 LGATE1 21 PGND 20 OCSET1 19 VSEN1 18 FB1 17 COMP1 16 FB3 15 DRIVE3 14 GND 13 VOUT2 Features • Provides 3 Regulated Voltages - Microprocessor Core, Clock and GTL Power • Drives N-Channel MOSFETs • 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 . . . . . . . . . . . . . . . . . . . . 2.1V DC 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 over 1MHz Applications • Full Motherboard Power Regulation for Computers • Low-Voltage Distributed Power Supplies Ordering Information PART NUMBER HIP6018BCB TEMP. RANGE (oC) PACKAGE 0 to 70 24 Ld SOIC PKG. NO. M24.3 2-238 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Copyright © Intersil Corporation 1999
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