2-62

HIP6004A

Buck and Synchronous-Rectifier (PWM)

Controller and Output Voltage Monitor

The HIP6004A 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 HIP6004A 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 HIP6004A includes a fully TTL-

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

adjusts the output voltage from 2.1VDC to 3.5VDC in 0.1V

increments and from 1.8VDC to 2.05VDC in 0.05V steps.

The precision reference and voltage-mode regulator hold the

selected output voltage to within

±1% over temperature and

line voltage variations.

The HIP6004A 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/ms slew rate which enables high converter bandwidth for

fast transient performance. The resulting PWM duty ratio

ranges from 0% to 100%.

The HIP6004A 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 HIP6004A

protects against over-current and over-voltage conditions by

inhibiting PWM operation. Additional built-in over-voltage

protection triggers an external SCR to crowbar the input

supply. The HIP6004A monitors the current by using the

a current sensing resistor.

6X86™ is a trademark of Cyrix Corporation.

Alpha Micro™ is a trademark of Digital Computer 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.

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

HIP6004A

(SOIC)

TOP VIEW

Ordering Information

PART NUMBER

TEMP.

PACKAGE

PKG.

NO.

HIP6004ACB

0 to 70

20 Ld SOIC

M20.3

11

12

13

14

15

16

17

18

20

19

10

9

8

7

6

5

4

3

2

1

OCSET

SS

VID0

VID1

VID2

VID4

VID3

COMP

FB

RT

LGATE

PGND

OVP

BOOT

UGATE

PHASE

PGOOD

GND

Data Sheet

October 1997

File Number

4417.1

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

http://www.intersil.com or 407-727-9207