4-1
TM
File Number
4735
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
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Copyright
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
DC
to 2.05V
DC
in 0.05V steps and
from 2.1V
DC
to 3.5V
DC
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
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
Ordering Information
PART NUMBER
TEMP.
RANGE (
o
C)
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
Data Sheet
April 1999