?/DIV>
FN4837.5
HIP6521
PWM and Triple Linear Power Controller
The HIP6521 provides the power control and protection for
four output voltages in high-performance microprocessor and
computer applications. The IC integrates a voltage-mode
PWM controller and three linear controllers, as well as
monitoring and protection functions into a 16 Ld SOIC
package. The PWM controller is intended to regulate the
microprocessor memory core voltage with a
synchronous-rectified buck converter. The linear controllers
are intended to regulate the computer systems AGP 1.5V bus
power, the 2.5V clock power, and the 1.8V power for the
North/South Bridge core voltage and/or cache memory
circuits. Both the switching regulator and linear voltage
references provide ?% of static regulation over line, load,
and temperature ranges. All outputs are user-adjustable by
means of an external resistor divider. All linear controllers
employ bipolar NPNs for the pass transistors.
The HIP6521 monitors all the output voltages. The PWM
controllers adjustable overcurrent function monitors the
output current by using the voltage drop across the upper
MOSFETs r
DS(ON)
. The linear regulator outputs are
monitored via the FB pins for undervoltage events.
Features
"  Provides 4 Regulated Voltages
-  Memory Core, AGP, Clock, and Memory Controller Hub
Power
"  ACPI Compatible
"  Drives Bipolar Linear Pass Transistors
"  Externally Resistor-Adjustable Outputs
"  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
-  All Outputs: ?% Over Temperature
"  Overcurrent Fault Monitors
-  Switching Regulator Does Not Require Extra Current
Sensing Element, Uses MOSFETs r
DS(ON)
"  Small Converter Size
-  300kHz Constant Frequency Operation
-  Small External Component Count
"  Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
"
Motherboard Power Regulation for Computers
Related Literature
"  Technical Brief TB363 Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)
Pinout
HIP6521 (SOIC)
TOP VIEW
Ordering Information
PART
NUMBER
PART
MARKING
TEMP.
RANGE (癈)   PACKAGE
PKG.
DWG. #
HIP6521CB
HIP6521CB
0 to 70
16 Ld SOIC   M16.15
HIP6521CBZ
(Note)
6521CBZ
0 to 70
16 Ld SOIC
(Pb-free)
M16.15
HIP6521EVAL1  Evaluation Board
NOTE: Intersil Pb-free plus anneal 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-02.
Add -T suffix for tape and reel.
DRIVE2
FB2
FB
COMP
FB3
OCSET
DRIVE4
FB4
DRIVE3
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
UGATE
GND
LGATE
PHASE
BOOT
VCC
PGND
Data Sheet
October 16, 2006
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 |  Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright ?Intersil Americas Inc. 2000, 2004, 2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.