4-1

File Number

4735

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

1-888-INTERSIL or 321-724-7143

Intersil Corporation 1999

HIP6020A

Advanced Dual PWM and Dual Linear
Power Controller

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 1.3V

to 2.05V

in 0.05V steps and

from 2.1V

to 3.5V

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% (V

OUT3

) and 1.8V

3% (V

OUT4

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
r

DS(ON)

, eliminating the need for a current sensing resistor.

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 - 1.3V

to 3.5V

· Power-Good Output Voltage Monitor

· Over-Voltage and Over-Current Fault Monitors

- Switching Regulators Use MOSFET's r

DS(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 (

PACKAGE

PKG.

NO.

HIP6020ACB

0 to 70

28 Ld SOIC

M28.3

UGATE2

PHASE2

VID4

VID3

VSEN2

SELECT

FAULT/RT

FB4

VCC

PGND

LGATE1

PHASE1

DRIVE3

COMP1

GND

VAUX

DRIVE4

UGATE1

PGOOD

VID2

OCSET2

VSEN1

FB3

VID1

VID0

OCSET1

FB1

Data Sheet

April 1999

4-2

Bloc

k Dia

gram

SOFT-

START

INHIBIT

PWM

COMP1

ERROR

AMP1

VCC

PGOOD

PWM1

GND

VSEN1

OCSET1

VID0

VID1

VID2

VID3

FB1

COMP1

DACOUT

UGATE1

PHASE1

200

4.5V

VID4

LGATE1

PGND

DRIVE4

DRIVE3

FB3

INHIBIT

PWM2

UGATE2

PHASE2

ERROR

AMP2

PWM

COMP2

200

OCSET2

VSEN2

FAULT / RT

GATE

CONTROL

1.26V

POWER-ON

RESET (POR)

TTL D/A

CONVERTER

(DAC)

OSCILLATOR

GATE

CONTROL

VCC

& FAULT

LOGIC

1.5V

SYNCH

DRIVE

DRIVE1

DRIVE2

UNDER-

VOLTAGE

FB4

LINEAR

FAULT

LUV

OC2

OC1

3.3V

SELECT

VAUX

0.75

0.90

1.10

1.15

HIP6020A

4-3

Simplified Power System Diagram

Typical Application

PWM1

+5V

OUT1

OUT2

OUT3

OUT4

PWM2

LINEAR

HIP6020A

CONTROLLER

+3.3V

VID1

VID2

VID3

VID4

GND

VCC

+5V

VID0

+12V

OUT1

PGND

VSEN1

PGOOD

LGATE1

UGATE1

OCSET1

PHASE1

POWERGOOD

FB1

COMP1

1.3V TO 3.5V

SELECT

UGATE2

PHASE2

CR2

VSEN2

DRIVE3

FB3

FB4

OUT4

1.5V

1.8V

OUT3

OUT2

OUT1

OUT2

OUT1

HIP6020A

OUT2

OUT3

OUT4

1.5V OR 3.3V

FAULT / RT

TYPEDET

DRIVE4

VAUX

OCSET2

+3.3V

HIP6020A

4-4

Absolute Maximum Ratings

Thermal Information

Supply Voltage, V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +15V

PGOOD, RT/FAULT, DRIVE, PHASE, and

GATE Voltage . . . . . . . . . . . . . . . . . . . GND - 0.3V to V

+ 0.3V

Input, Output or I/O Voltage . . . . . . . . . . . . . . . . . . GND -0.3V to 7V
ESD Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Class 1

Recommended Operating Conditions

Supply Voltage, V

. . . . . . . . . . . . . . . . . . . . . . . . . . . +12V

10%

Ambient Temperature Range . . . . . . . . . . . . . . . . . . . . 0

C to 70

Junction Temperature Range . . . . . . . . . . . . . . . . . . . 0

C to 125

Thermal Resistance (Typical, Note 1)

(

C/W)

SOIC Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Maximum Junction Temperature (Plastic Package) . . . . . . . .150

Maximum Storage Temperature Range . . . . . . . . . . -65

C to 150

Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . .300

(SOIC - Lead Tips Only)

Electrical Specifications

Recommended Operating Conditions, Unless Otherwise Noted. Refer to Figures 1, 2 and 3

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNITS

VCC SUPPLY CURRENT

Nominal Supply Current

UGATE1, LGATE1, UGATE2, DRIVE3, and
DRIVE4 Open

POWER-ON RESET

Rising VCC Threshold

OCSET

= 4.5V

10.4

Falling VCC Threshold

OCSET

= 4.5V

8.2

Rising VAUX Threshold

OCSET

= 4.5V

2.5

VAUX Threshold Hysteresis

OCSET

= 4.5V

0.5

Rising V

OCSET1

Threshold

1.26

OSCILLATOR

Free Running Frequency

OSC

RT = OPEN

185

200

215

kHz

Total Variation

< RT to GND < 200k

-15

+15

Ramp Amplitude

OSC

RT = Open

1.9

P-P

DAC AND STANDARD BUCK REGULATOR REFERENCE

DAC(VID0-VID4) Input Low Voltage

0.8

DAC(VID0-VID4) Input High Voltage

2.0

DACOUT Voltage Accuracy

-1.0

+1.0

PWM2 Reference Voltage

SELECT < 0.8V

1.5

PWM2 Reference Voltage Tolerance

LINEAR REGULATORS (V

OUT3

AND V

OUT4

)

Regulation

FB3 Regulation Voltage

VREG

1.5

FB4 Regulation Voltage

VREG

1.8

FB3,4 Under-Voltage Level

FB Rising

FB3,4 Under-Voltage Hysteresis

Output Drive Current

VAUX-V

DRIVE

> 0.6V

SYNCHRONOUS PWM CONTROLLER ERROR AMPLIFIER

DC Gain

Gain-Bandwidth Product

GBWP

MHz

Slew Rate

COMP1 = 10pF

HIP6020A

4-5

PWM CONTROLLERS GATE DRIVERS

UGATE1,2 Source

UGATE

VCC = 12V, V

UGATE1

(or V

UGATE2

) = 6V

UGATE1,2 Sink

UGATE

GATE-PHASE

= 1V

1.7

3.5

LGATE Source

LGATE

VCC = 12V, V

LGATE1

= 1V

LGATE Sink

LGATE

= 1V

1.4

3.0

PROTECTION

VSEN1 Over-Voltage (VSEN1/DACOUT)

VSEN1 Rising

115

120

FAULT Sourcing Current

OVP

FAULT/RT

= 2.0V

8.5

OCSET1,2 Current Source

OCSET

= 4.5V

170

200

230

Soft-Start Current

VSEN2 Under-Voltage Threshold

SELECT < 0.8V

SELECT > 2.0V

2.475

VSEN2 Under-Voltage Hysteresis

SELECT < 0.8V

SELECT > 2.0V

0.231

POWER GOOD

VSEN1 Upper Threshold
(VSEN1/DACOUT)

VSEN1 Rising

108

110

VSEN1 Under-Voltage
(VSEN1/DACOUT)

VSEN1 Rising

VSEN1 Hysteresis (VSEN1/DACOUT)

Upper/Lower Threshold

PGOOD Voltage Low

PGOOD

= -4mA

0.8

Electrical Specifications

Recommended Operating Conditions, Unless Otherwise Noted. Refer to Figures 1, 2 and 3 (Continued)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNITS

Typical Performance Curves

FIGURE 1. R

RESISTANCE vs FREQUENCY

FIGURE 2. BIAS SUPPLY CURRENT vs FREQUENCY

100

1000

SWITCHING FREQUENCY (kHz)

RESIST

ANCE (k

)

100

1000

PULLUP

TO +12V

PULLDOWN TO V

100

200

300

400

500

600

700

800

900

1000

(mA)

SWITCHING FREQUENCY (kHz)

140

120

100

C = 660pF

C = 1500pF

C = 3600pF

C = 4800pF

UGATE1

= C

UGATE2

= C

LGATE1

= C

= 5V ; SELECT < 0.8V

= 12V

HIP6020A

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