FN4735 Rev 2.00

Page 1 of 16

September 2001

FN4735

Rev 2.00

September 2001

HIP6020A

Advanced Dual PWM and Dual Linear Power Controller

DATASHEET

The HIP6020A 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 HIP6020A includes an Intel-compatible, TTL 5-input

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

output voltage from 1.3VDC to 2.05VDC in 0.05V steps and

from 2.1VDC to 3.5VDC in 0.1V increments. The precision

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 (

3%) or fully ON switch. The

linear regulators use external N-Channel MOSFETs or

bipolar NPN pass transistors to provide output voltages of

1.5V

3% (VOUT3) and 1.8V 3% (VOUT4).

The HIP6020A 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

rDS(ON), eliminating the need for a current sensing resistor.

Related Literature

• Technical Brief TB363 “Guidelines for Handling and

Processing Moisture Sensitive Surface Mount Devices

(SMDs)”

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

(1.5V Setting Only)

- Other Outputs:

3% Over Temperature

• TTL-Compatible 5 Bit DAC Microprocessor Core Output

Voltage Selection

- Wide Range - 1.3VDC to 3.5VDC

• Power-Good Output Voltage Monitor

• Over-Voltage and Over-Current Fault Monitors

- Switching Regulators Use MOSFET’s rDS(ON) Sensing

• 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

HIP6020A (SOIC)

TOP VIEW

Ordering Information

PART NUMBER

TEMP.

RANGE (oC)

PACKAGE

PKG.

NO.

HIP6020ACB

0 to 70

28 Ld SOIC

M28.3

UGATE2

PHASE2

VID4

VID3

VSEN2

SELECT

SS

FAULT/RT

FB4

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

FB3

VID1

VID0

OCSET1

FB1