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HIP6020

Advanced Dual PWM and Dual Linear

Power Controller

The HIP6020 provides the power control and protection for

four output voltages in high-performance, graphics intensive

microprocessor and computer applications. The IC

integrates two PWM controllers and two linear controllers, as

well as the monitoring and protection functions into a 28-pin

SOIC package. One PWM controller regulates the

microprocessor core voltage with a synchronous-rectified

buck converter. The second PWM controller supplies the

computer system’s AGP 1.5V or 3.3V bus power with a

standard buck converter. The linear controllers regulate

power for the 1.5V GTL bus and the 1.8V power for the

North/South Bridge core voltage and/or cache memory

circuits.

The HIP6020 includes an Intel-compatible, TTL 5-input

digital-to-analog converter (DAC) that adjusts the core PWM

reference and voltage-mode control provide

±1% static

regulation. The second PWM controller’s output is user-

selectable, through a TTL-compatible signal applied at the

SELECT pin, for levels of 1.5V or 3.3V with

±3% accuracy.

The linear regulators use external N-Channel MOSFETs or

bipolar NPN pass transistors to provide fixed output voltages

of 1.5V

The HIP6020 monitors all the output voltages. A single

Power Good signal is issued when the core is within

±10% of

the DAC setting and all other outputs 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

controllers’ over-current function monitors the output current

by using the voltage drop across the upper MOSFET’s

Features

• Provides 4 Regulated Voltages

- Microprocessor Core, AGP Bus, North/South Bridge

and/or Cache Memory, and GTL Bus Power

• Drives N-Channel MOSFETs

• Linear Regulator Drives Compatible with both MOSFET

and Bipolar Series Pass Transistors

• Simple Single-Loop Control Designs

- Voltage-Mode PWM Control

• Fast PWM Converter Transient Response

- High-Bandwidth Error Amplifiers

- Full 0% to 100% Duty Ratios

• Excellent Output Voltage Regulation

- Core PWM Output:

±1% Over Temperature

- AGP Bus PWM Output:

±3% Over Temperature

- Other Outputs:

±3% Over Temperature

• TTL-Compatible 5 Bit DAC Microprocessor Core Output

Voltage Selection

• Power-Good Output Voltage Monitor

• Over-Voltage and Over-Current Fault Monitors

- Switching Regulators Do Not Require Extra Current

• Small Converter Size

- Constant Frequency Operation

- 200kHz Free-Running Oscillator; Programmable From

50kHz to Over 1MHz

- Small External Component Count

Applications

• Motherboard Power Regulation for Computers

Pinout

HIP6020 (SOIC)

TOP VIEW

Ordering Information

PART NUMBER

TEMP.

PACKAGE

PKG.

NO.

HIP6020CB

0 to 70

28 Ld SOIC

M28.3

HIP6020EVAL1

Evaluation Board

UGATE2

PHASE2

VID4

VID3

VSEN2

SELECT

SS

FAULT/RT

VSEN4

VCC

PGND

LGATE1

PHASE1

DRIVE3

COMP1

GND

VAUX

DRIVE4

UGATE1

28

27

26

25

24

23

22

21

20

19

18

17

16

15

1

2

3

4

5

6

7

8

9

10

11

12

13

14

PGOOD

VID2

OCSET2

VSEN1

VSEN3

VID1

VID0

OCSET1

FB1

Data Sheet

February 1999

File Number

4683

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

http://www.intersil.com or 407-727-9207