74

TM

HIP6004B

Buck and Synchronous-Rectifier (PWM)

Controller and Output Voltage Monitor

The HIP6004B provides complete control and protection for

a DC-DC converter optimized for high-performance

microprocessor applications. It is designed to drive two

N-Channel MOSFETs in a synchronous-rectified buck

topology. The HIP6004B integrates all of the control, output

adjustment, monitoring and protection functions into a

single package.

The output voltage of the converter is easily adjusted and

precisely regulated. The HIP6004B includes a fully TTL-

compatible 5-input digital-to-analog converter (DAC) that

steps. The precision reference and voltage-mode regulator

hold the selected output voltage to within

±1% over

temperature and line voltage variations.

The HIP6004B provides simple, single feedback loop,

voltage-mode control with fast transient response. It

includes a 200kHz free-running triangle-wave oscillator that

is adjustable from below 50kHz to over 1MHz. The error

amplifier features a 15MHz gain-bandwidth product and

6V/

µs slew rate which enables high converter bandwidth for

fast transient performance. The resulting PWM duty ratio

ranges from 0% to 100%.

The HIP6004B monitors the output voltage with a window

comparator that tracks the DAC output and issues a Power

Good signal when the output is within

±10%. The

HIP6004B protects against over-current and overvoltage

conditions by inhibiting PWM operation. Additional built-in

overvoltage protection triggers an external SCR to crowbar

the input supply. The HIP6004B monitors the current by

the need for a current sensing resistor.

Features

• Drives Two N-Channel MOSFETs

• Operates from +5V or +12V Input

• Simple Single-Loop Control Design

- Voltage-Mode PWM Control

• Fast Transient Response

- High-Bandwidth Error Amplifier

- Full 0% to 100% Duty Ratio

• Excellent Output Voltage Regulation

-

±1% Over Line Voltage and Temperature

• TTL-Compatible 5-Bit Digital-to-Analog Output

Voltage Selection

• Power-Good Output Voltage Monitor

• Over-Voltage and Over-Current Fault Monitors

- Does Not Require Extra Current Sensing Element,

• Small Converter Size

- Constant Frequency Operation

- 200kHz Free-Running Oscillator Programmable from

50kHz to over 1MHz

Applications

• Power Supply for Pentium®, Pentium Pro, Pentium II,

PowerPC™, K6™, 6X86™ and Alpha™ Microprocessors

• High-Power 5V to 3.xV DC-DC Regulators

• Low-Voltage Distributed Power Supplies

Pinout

HIP6004B

(SOIC, TSSOP)

TOP VIEW

6X86™ is a trademark of Cyrix Corporation.

Alpha™ is a trademark of Digital Equipment Corporation.

K6™ is a trademark of Advanced Micro Devices, Inc.

Pentium® is a registered trademark of Intel Corporation.

PowerPC™ is a trademark of IBM.

Ordering Information

PART NUMBER

TEMP.

PACKAGE

PKG.

NO.

HIP6004BCB

0 to 70

20 Ld SOIC

M20.3

HIP6004BCV

0 to 70

20 Ld TSSOP

M20.173

NOTE: When ordering, use the entire part number. Add the suffix T

to obtain the TSSOP variant in tape and reel, e.g., HIP6004BCV-T.

11

12

13

14

15

16

17

18

20

19

10

9

8

7

6

5

4

3

2

1

VSEN

OCSET

SS

VID0

VID1

VID2

VID4

VID3

COMP

FB

RT

VCC

LGATE

PGND

OVP

BOOT

UGATE

PHASE

PGOOD

GND

Data Sheet

February 1999

FN4567.2

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

1-888-INTERSIL or 321-724-7143

Copyright © Intersil Americas Inc. 2002. All Rights Reserved

HIP6004B