Intersil Corporation HIP6021 Datasheet

HIP6021

Data Sheet February 1999 File Number

Advanced PWM and Triple Linear Power
Controller

The HIP6021 provides the power control and protection for
four output voltages in high-performance, graphics intensive
microprocessor and computer applications. The IC
integrates a voltage-mode PWM controller and three linear
controllers, as well as the monitoring and protection
functions into a 28-pin SOIC package. The PWM controller
regulates the microprocessor core voltage with a
synchronous-rectified buck converter. The linear controllers
regulate the computer system’s AGP 1.5V or 3.3V bus
power, the 1.5V GTL bus power, and the 1.8V power for the
North/South Bridge core voltage and/or cache memory
circuits. The HIP6021 includes an Intel-compatible, TTL
5-input digital-to-analog converter (DAC) that adjusts the
core PWM output voltage from 1.3V
steps and from 2.1V

to 3.5VDC in 0.1V increments. The

DC

to 2.05VDC in 0.05V

DC

precision reference and voltage-mode control provide±1%
static regulation. The AGP bus power linear controller’s
output (V

) isuser-selectable, throughaTTL-compatible

OUT2

signal applied at the SELECT pin, for levels of 1.5V or 3.3V
with ±3% accuracy. Based on the status of the FIX pin, the
other two linear regulators provide either fixed output
voltages of 1.5V±3% (V

) and 1.8V±3% (V

OUT3

OUT4

), or
user-adjustable by means of an external resistor divider. All
linear controllers can employ either N-channel MOSFETs or
bipolar NPNs for the pass transistor.

The HIP6021 monitors all the output voltages. A single
Power Good signal isissuedwhenthe 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
controller’s over-currentfunction monitors the output current
by using the voltage drop across the upper MOSFET’s
r

DS(ON)

.

Ordering Information

TEMP.

PART NUMBER

HIP6021CB 0 to 70 28 Ld SOIC M28.3
HIP6021EVAL1 Evaluation Board

RANGE (oC) PACKAGE

PKG.

NO.

Applications

•

Motherboard Power Regulation for Computers

4684

Features

• Provides 4 Regulated Voltages

- Microprocessor Core, AGP Bus, Memory, and GTL Bus
Power

• Drives N-Channel MOSFETs

• Linear Regulator Drives Compatible with both MOSFET
and Bipolar Series Pass Transistors

• Fixed or Externally Resistor-Adjustable Linear Outputs
(FIX Pin)

• Simple Single-Loop Control Design

- Voltage-Mode PWM Control

• Fast PWM Converter Transient Response

- High-Bandwidth Error Amplifier

- Full 0% to 100% Duty Ratio

• Excellent Output Voltage Regulation

- Core PWM Output: ±1% Over Temperature

- Other Outputs: ±3% Over Temperature

• TTL-Compatible 5-Bit DAC Microprocessor Core Output
Voltage Selection

- Wide Range . . . . . . . . . . . . . . . . . . . 1.3V

DC

to 3.5V

• Power-Good Output Voltage Monitor

• Over-Voltage and Over-Current Fault Monitors

- Switching Regulator Does Not Require Extra Current

Sensing Element, Uses MOSFET’s r

DS(ON)

• Small Converter Size

- Constant Frequency Operation

- 200kHz Free-Running Oscillator; Programmable From

50kHz to Over 1MHz

- Small External Component Count

Pinout

HIP6021 (SOIC)

TOP VIEW

VCC

DRIVE2

FIX
VID4
VID3
VID2
VID1
VID0

PGOOD

SD

VSEN2

SELECT

SS

FAULT/RT

VSEN4

1
2
3
4
5
6
7
8

9
10
11
12
13
14

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

UGATE
PHASE
LGATE
PGND
OCSET
VSEN1
FB
COMP
VSEN3
DRIVE3
GND
VAUX
DRIVE4

DC

2-296

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

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

| Copyright © Intersil Corporation 1999

Block Diagram

HIP6021

VCC

OCSET

VSEN1

SD

FIX

VAUX

POWER-ON

RESET (POR)

200µA

+

x 1.10

PGOOD

VCC

-

+

x 0.90

-

LUV

-

+

x 1.15

LINEAR

UNDER-

OV

VOLTAGE

UGATE

DRIVE1

SOFT-

START

INHIBIT

+

OC1

LOGIC

AND FAULT

FAULT

PHASE

-

GATE

LGATE

VCC

CONTROL

PWM1

PWM

COMP1

-

+

-

+

AMP1

ERROR

PGND

DRIVE

SYNCH

VCC

GND

TTL D/A

CONVERTER

DACOUT

28µA

VID4

VID3

(DAC)

4.5V

VID2

VID1

VID0

COMP

FB

SS

VSEN3

VAUX

2-297

-

-

+

DRIVE3

+

x 0.75

+

DRIVE4

-

+

1.26V

-

+

+

-

+

-

VSEN4

-

DRIVE2

VSEN2

x 0.75

OSCILLATOR

or

3.3V

1.5V

-

+

SELECT

FAULT / RT

Simplified Power System Diagram

+5V

IN

+3.3V

IN

Q3

V

OUT2

HIP6021

LINEAR

CONTROLLER

HIP6021

PWM

CONTROLLER

Q1

Q2

V

OUT1

V

Typical Application

+12V

IN

+5V

IN

+3.3V

IN

V

OUT2

1.5V OR 3.3V

TYPEDET

V

OUT3

1.5V

L

IN

OUT3

Q4

C

IN

Q4

C

Q3

OUT2

DRIVE2

VSEN2

SELECT

VAUX

DRIVE3

VSEN3

LINEAR

CONTROLLER

HIP6021

VCC

LINEAR

CONTROLLER

OCSET

PGOOD

UGATE
PHASE

LGATE
PGND

VSEN1

FB

COMP

Q1

Q2

Q5

L

OUT1

C

OUT1

V

OUT4

POWERGOOD

1.3V TO 3.5V

V

OUT1

V

1.8V

OUT4

C

C

OUT3

OUT4

Q5

2-298

FIX

DRIVE4

VSEN4

SS

C

SS

GND

FAULT / RT

VID0
VID1
VID2

VID3
VID4

HIP6021

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

Operating Conditions

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

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

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

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operationofthe
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

NOTE:

1. θJA is measured with the component mounted on an evaluation PC board in free air.

Electrical Specifications Recommended Operating Conditions, Unless Otherwise Noted. Refer to Block and Simplified Power System

Diagrams, and Typical Application Schematic

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

OCSET

OSCILLATOR

Free Running Frequency F

OSC

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

OSC

DAC AND BANDGAP 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 %
Bandgap Reference Voltage V

BG

Bandgap Reference Tolerance -2.5 - +2.5 %
LINEAR REGULATORS (OUT2, OUT3, AND OUT4)
Regulation (All Linears) -3- %
VSEN2 Regulation Voltage VREG
VSEN2 Regulation Voltage VREG
VSEN3 Regulation Voltage VREG
VSEN4 Regulation Voltage VREG
Under-Voltage Level (VSEN/VREG) VSEN
Under-Voltage Hysteresis (VSEN/VREG) VSEN Falling - 7 - %
Output Drive Current (All Linears) VAUX-V

UGATE, LGATE, DRIVE2, DRIVE3, and
DRIVE4 Open

OCSET
OCSET
OCSET
OCSET

RT = OPEN 185 200 215 kHz

RT = Open - 1.9 - V

SELECT < 0.8V - 1.5 - V

2

SELECT > 2.0V - 3.3 - V

2
3
4

VSEN Rising - 75 - %

UV

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

- 1.265 - V

- 1.5 - V

- 1.8 - V

> 0.6V 20 40 - mA

DRIVE

P-P

2-299

HIP6021

Electrical Specifications Recommended Operating Conditions, Unless Otherwise Noted. Refer to Block and Simplified Power System

Diagrams, and Typical Application Schematic (Continued)

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS

SYNCHRONOUS PWM CONTROLLER ERROR AMPLIFIER

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

PWM CONTROLLER GATE DRIVER

UGATE Source I
UGATE Sink R
LGATE Source I
LGATE Sink R

UGATE

UGATEVGATE-PHASE

LGATE

LGATE

VCC = 12V, V

VCC = 12V, V
V

= 1V - 1.4 3.0 Ω

LGATE

PROTECTION

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

OVP

OCSET

SS

V

FAULT/RT

V

OCSET

= 2.0V - 8.5 - mA

= 4.5V

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

PGOODIPGOOD

= -4mA - - 0.8 V

= 6V - 1 - A

UGATE

= 1V - 1.7 3.5 Ω

= 1V - 1 - A

LGATE

DC

170 200 230 µA

-28- µA

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

100

C
VIN = 5V

80

VCC = 12V

60

(mA)

CC

I

40

20

0

100 200 300 400 500 600 700 800 900 1000

UGATE1

= C

= C

UGATE2

SWITCHING FREQUENCY (kHz)

LGATE1

= C

C = 4800pF

C = 3600pF

C = 1500pF

C = 660pF

2-300