Intersil Corporation HIP6020A Datasheet

TM

HIP6020A

Data Sheet April 1999

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 twoPWM 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
from 2.1V

to 3.5VDC in 0.1V increments. The precision

DC

to 2.05VDC in 0.05V steps and

DC

reference and voltage-mode control provide±1% static
regulation. The second PWM controller’s output is user­selectable, 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

) and 1.8V ±3% (V

OUT3

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 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
controllers’ over-current function monitors the output current
by using the voltage drop across the upper MOSFET’s
r

, eliminating the need for a current sensing resistor.

DS(ON)

Ordering Information

TEMP.

PART NUMBER

HIP6020ACB 0 to 70 28 Ld SOIC M28.3

RANGE (oC) PACKAGE

PKG.

NO.

File Number 4735

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

DC

to 3.5V

DC

• 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

28
27
26
25
24
23
22
21
20
19
18
17
16
15

VCC
UGATE1
PHASE1
LGATE1
PGND
OCSET1
VSEN1
FB1
COMP1
FB3
DRIVE3
GND
VAUX
DRIVE4

UGATE2
PHASE2

VID4
VID3
VID2
VID1
VID0

PGOOD

OCSET2

VSEN2

SELECT

SS

FAULT/RT

FB4

1
2
3
4
5
6
7
8

9
10
11
12
13
14

4-1

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

1-888-INTERSIL or 321-724-7143

| Copyright © Intersil Corporation 1999

Block Diagram

4-2

DRIVE3

DRIVE4

FB4

UGATE2

PHASE2

VSEN2

SELECT

VAUX

VCC

DRIVE2

+

-

-

+

+

-

x

1.5V
or

3.3V

FB3

GATE

CONTROL

0.75

+

-

x

+

1.26V

PWM2

0.75

-

INHIBIT

-

+

-

+

ERROR

AMP2

+

-

+

-

OC2

+

-

PWM

COMP2

OSCILLATOR

LINEAR
UNDER-

VOLTAGE

200µA

INHIBIT

FAULT

OCSET2

SOFT-

START

& FAULT

LOGIC

LUV

VCC

28µA

OV

4.5V

x

1.10

x

0.90

x

1.15

ERROR

AMP1

DACOUT

VSEN1

OCSET1

+

-

+

-

+

-

200µA

VCC

POWER-ON

RESET (POR)

VAUX

PGOOD

HIP6020A

DRIVE1

OC1

+

-

+

-

+

-

PWM

COMP1

TTL D/A

CONVERTER

(DAC)

PWM1

GATE

CONTROL

SYNCH

DRIVE

VCC

UGATE1

PHASE1

VCC

LGATE1

PGND

GND

FAULT / RT

SS

FB1

COMP1

VID0

VID1

VID2

VID4

VID3

Simplified Power System Diagram

+5V

IN

HIP6020A

V

OUT2

+3.3V

IN

V

OUT3

Typical Application

+12V

IN

+5V

IN

+3.3V

IN

V

OUT2

1.5V OR 3.3V

L

IN

C

OUT2

L

C

OUT2

Q3

PWM2

CONTROLLER

PWM1

CONTROLLER

Q1

Q2

V

OUT1

HIP6020A

Q4

IN

OCSET2

Q3

CR2

UGATE2

PHASE2

LINEAR

CONTROLLER

VCC

LINEAR

CONTROLLER

OCSET1

PGOOD

UGATE1
PHASE1

Q1

Q5

L

OUT1

V

OUT4

POWERGOOD

V

1.3V TO 3.5V

OUT1

TYPEDET

V

OUT3

1.5V

C

V

OUT4

1.8V

OUT3

C

OUT4

Q5

Q4

4-3

VSEN2

SELECT

VAUX

HIP6020A

DRIVE3

FB3

DRIVE4

FB4

SS

C

SS

GND

LGATE1
PGND

VSEN1

FB1

COMP1

FAULT / RT

VID0
VID1
VID2

VID3
VID4

Q2

C

OUT1

HIP6020A

Absolute Maximum Ratings Thermal Information

Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +15V

PGOOD, RT/FAULT, DRIVE, PHASE, and

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

Input, Output or I/O Voltage. . . . . . . . . . . . . . . . . . GND -0.3V to 7V

ESD Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Class 1

Recommended Operating Conditions

Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . +12V ±10%

Ambient Temperature Range. . . . . . . . . . . . . . . . . . . . 0oC to 70oC

Junction Temperature Range. . . . . . . . . . . . . . . . . . . 0oC to 125oC

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 I

CC

POWER-ON RESET

Rising VCC Threshold V
Falling VCC Threshold V
Rising VAUX Threshold V
VAUX Threshold Hysteresis V
Rising V

Threshold - 1.26 - V

OCSET1

OSCILLATOR

Free Running Frequency F

OSC

Total Variation 6kΩ < RT to GND < 200kΩ -15 - +15 %
Ramp Amplitude ∆V

OSC

DAC AND STANDARD BUCK REGULATOR REFERENCE

DAC(VID0-VID4) Input Low Voltage 0.8 V
DAC(VID0-VID4) Input High Voltage 2.0 V
DACOUT Voltage Accuracy -1.0 - +1.0 %
PWM2 Reference Voltage SELECT < 0.8V - 1.5 - V
PWM2 Reference Voltage Tolerance -3- %

LINEAR REGULATORS (V

OUT3

AND V

OUT4

)

Regulation -3- %
FB3 Regulation Voltage VREG
FB4 Regulation Voltage VREG
FB3,4 Under-Voltage Level FB

UV

FB3,4 Under-Voltage Hysteresis 7%
Output Drive Current VAUX-V

SYNCHRONOUS PWM CONTROLLER ERROR AMPLIFIER

DC Gain -88- dB
Gain-Bandwidth Product GBWP - 15 - MHz
Slew Rate SR COMP1 = 10pF - 6 - V/µs

UGATE1, LGATE1, UGATE2, DRIVE3, and
DRIVE4 Open

OCSET
OCSET
OCSET
OCSET

RT = OPEN 185 200 215 kHz

RT = Open - 1.9 - V

3
4

FB Rising - 75 - %

Thermal Resistance (Typical, Note 1) θJA (oC/W)

SOIC Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

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

Maximum Storage Temperature Range. . . . . . . . . . -65oC to 150oC

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

(SOIC - Lead Tips Only)

-9-mA

= 4.5V - - 10.4 V
= 4.5V 8.2 - - V
= 4.5V - 2.5 - V
= 4.5V - 0.5 - V

- 1.5 - V

- 1.8 - V

> 0.6V 20 40 - mA

DRIVE

P-P

4-4

HIP6020A

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

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS

PWM CONTROLLERS GATE DRIVERS

UGATE1,2 Source I
UGATE1,2 Sink R
LGATE Source I
LGATE Sink R

UGATE

UGATE

LGATE

LGATE

VCC = 12V, V
V

GATE-PHASE

VCC = 12V, V
V

= 1V - 1.4 3.0 Ω

LGATE

UGATE1

(or V

) = 6V - 1 - A

UGATE2

= 1V - 1.7 3.5 Ω

= 1V - 1 - A

LGATE1

PROTECTION

VSEN1 Over-Voltage (VSEN1/DACOUT) VSEN1 Rising - 115 120 %
FAULT Sourcing Current I
OCSET1,2 Current Source I
Soft-Start Current I

OVP

OCSET

SS

V

FAULT/RT

V

OCSET

= 2.0V - 8.5 - mA

= 4.5V

DC

170 200 230 µA

-28- µA

VSEN2 Under-Voltage Threshold SELECT < 0.8V - 75 - %

SELECT > 2.0V - 2.475 - V

VSEN2 Under-Voltage Hysteresis SELECT < 0.8V - 7 - %

SELECT > 2.0V - 0.231 - V

POWER GOOD

VSEN1 Upper Threshold

VSEN1 Rising 108 - 110 %

(VSEN1/DACOUT)
VSEN1 Under-Voltage

VSEN1 Rising 92 - 94 %

(VSEN1/DACOUT)
VSEN1 Hysteresis (VSEN1/DACOUT) Upper/Lower Threshold - 2 - %
PGOOD Voltage Low V

PGOOD

I

= -4mA - - 0.8 V

PGOOD

Typical Performance Curves

1000

100

RESISTANCE (kΩ)

10

RT PULLUP
TO +12V

RT PULLDOWN TO V

10 100 1000

SWITCHING FREQUENCY (kHz)

FIGURE 1. RT RESISTANCE vs FREQUENCY FIGURE 2. BIAS SUPPLY CURRENT vs FREQUENCY

SS

140

C

120

100

80

(mA)

CC

60

I

40

20

0

100 200 300 400 500 600 700 800 900 1000

= C

UGATE1

VIN = 5V ; SELECT < 0.8V

= 12V

V

CC

= C

UGATE2

SWITCHING FREQUENCY (kHz)

LGATE1

= C

C = 4800pF

C = 3600pF

C = 1500pF

C = 660pF

4-5