FN4567 Rev 3.00

Page 1 of 15

November 9, 2004

FN4567

Rev 3.00

November 9, 2004

HIP6004B

Buck and Synchronous-Rectifier (PWM) Controller and Output Voltage Monitor

DATASHEET

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)

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/

s 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 using the

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

• QFN Package:

- Compliant to JEDEC PUB95 MO-220

QFN - Quad Flat No Leads - Package Outline

- Near Chip Scale Package footprint, which improves

PCB efficiency and has a thinner profile

• Pb-Free Available (RoHS Compliant)

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

NOT RECOMMENDED FOR NEW D

ESIGNS

NO RECOMMENDED REPLACEME

NT

contact our Technical Support Cen

ter at

1-888-INTERSIL or www.intersil.co

m/tsc