1

®

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 system’s 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

±2% 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

controller’s adjustable overcurrent function monitors the

output current by using the voltage drop across the upper

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:

±2% Over Temperature

• Overcurrent Fault Monitors

- Switching Regulator Does Not Require Extra Current

• 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 (°C) 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.

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