1

TM

File Number

4837.1

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

1-888-INTERSIL or 321-724-7143

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-lead 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.

Applications

• Motherboard Power Regulation for Computers

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

Related Literature

• Technical Brief TB363 “Guidelines for Handling and

Processing Moisture Sensitive Surface Mount Devices

(SMDs)”

Pinout

HIP6521 (SOIC)

TOP VIEW

Ordering Information

PACKAGE

PKG.

NO.

HIP6521CB

0 to 70

16 Ld SOIC

M16.15

HIP6521EVAL1

Evaluation Board

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

August 2000