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HIP6021
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
systems 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
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 ?% static regulation. The AGP bus power
linear controllers output (V
OUT2
) is user-selectable, through a
TTL-compatible signal applied at the SELECT pin, for levels of
1.5V or 3.3V with ?% accuracy. Based on the status of the
FIX pin, the other two linear regulators provide either fixed
output voltages of 1.5V?% (V
OUT3
) and 1.8V?% (V
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 is issued when the core is within ?0% 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 MOSFETs
r
DS(ON)
.
Applications
"
Motherboard Power Regulation for Computers
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: ?% Over Temperature
-  Other Outputs: ?% 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 Regulator Does Not Require Extra Current
Sensing Element, Uses MOSFETs r
DS(ON)
"  Small Converter Size
-  Constant Frequency Operation
-  200kHz Free-Running Oscillator; Programmable From
50kHz to Over 1MHz
-  Small External Component Count
"  Pb-Free Available (RoHS Compliant)
Pinout
HIP6021 (SOIC)
TOP VIEW
Ordering Information
PART NUMBER
TEMP.
RANGE (
o
C)
PACKAGE
PKG.
DWG. #
HIP6021CB
0 to 70
28 Ld SOIC
M28.3
HIP6021CBZ (Note)
0 to 70
28 Ld SOIC (Pb-free) M28.3
HIP6021EVAL1
Evaluation Board
Add -T suffix for tape and reel.
NOTE:  Intersil Pb-free products employ special Pb-free material sets; molding
compounds/die attach materials and 100% matte tin plate termination finish, which are
RoHS compliant and compatible with both SnPb and Pb-free soldering operations.
Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that
meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
DRIVE2
FIX
VID4
VID3
VSEN2
SELECT
SS
FAULT/RT
VSEN4
VCC
PGND
LGATE
PHASE
DRIVE3
COMP
GND
VAUX
DRIVE4
UGATE
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
SD
VSEN1
VSEN3
VID1
VID0
OCSET
FB
Data Sheet
March 8, 2005
FN4684.1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Copyright ?Intersil Americas Inc. 1999, 2005. All Rights Reserved