Intersil Corporation HIP6004ACB, HIP6004A Datasheet

HIP6004A

Data Sheet October 1997 File Number

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 TTL­compatible 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 precisionreferenceand voltage-mode regulator holdthe
selected output voltage to within ±1% over temperature and
line voltage variations.

The HIP6004A provides simple, single feedback loop,
voltage-modecontrolwithfast transient response. Itincludes
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
r

DS(ON)

of the upper MOSFET whicheliminatestheneedfor

a current sensing resistor.

Ordering Information

TEMP.

PART NUMBER

HIP6004ACB 0 to 70 20 Ld SOIC M20.3

Alpha Micro™ is a trademark of Digital Computer Equipment Corporation.

RANGE (oC) PACKAGE

6X86™ is a trademark of Cyrix Corporation.

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

Pentium® is a registered trademark of Intel Corporation.

PowerPC™ is a trademark of IBM.

PKG.

NO.

4417.1

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

- Wide Range . . . . . . . . . . . . . . . . . . . 1.8V

DC

to 3.5V

- 0.1V Binary Steps. . . . . . . . . . . . . . . 2.1VDC to 3.5V

- 0.05V Binary Steps. . . . . . . . . . . . . 1.8VDC to 2.05V

• Power-Good Output Voltage Monitor

• Over-Voltage and Over-Current Fault Monitors

- Does Not Require Extra Current Sensing Element,

Uses MOSFET’s r

DS(ON)

• 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

V

SEN

OCSET

SS
VID0
VID1
VID2
VID3
VID4

COMP

FB

1
2
3
4
5
6
7
8
9

10

20
19
18
17
16
15
14
13
12
11

RT
OVP
V

CC

LGATE
PGND
BOOT
UGATE
PHASE
PGOOD
GND

DC
DC
DC

2-62

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

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

| Copyright © Intersil Corporation 1999

Typical Application

HIP6004A

Block Diagram

V

SEN

OCSET

VID0
VID1
VID2
VID3
VID4

FB

COMP

RT

PGOOD

SS

OVP

RT

VID0
VID1
VID2
VID3
VID4

FB

REFERENCE

TTL D/A

CONVERTER

(DAC)

OSC

D/A

+12V

V

CC

MONITOR AND

PROTECTION

HIP6004A

-

+

+

-

COMP

110%

90%

115%

200µA

DACOUT

V

SEN

+

-

ERROR

AMP

OCSET
EN
BOOT

UGATE
PHASE

LGATE
PGND

GND

+

-

+

-

OVER-

VOLTAGE

+

-

+

-

OVER-

CURRENT

COMPARATOR

OSCILLATOR

4V

PWM

+

-

VIN = +5V OR +12V

V

CC

POWER-ON

RESET (POR)

SOFT-

START

INHIBIT

PWM

GATE

CONTROL

LOGIC

+V

10µA

OUT

PGOOD

OVP

SS

BOOT
UGATE
PHASE

LGATE
PGND
GND

2-63

HIP6004A

Absolute Maximum Ratings Thermal Information

Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +15V

Boot Voltage, V

BOOT

- V

. . . . . . . . . . . . . . . . . . . . . . . . +15V

PHASE

Input, Output or I/O Voltage. . . . . . . . . . . .GND -0.3V to VCC +0.3V

ESD Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Class 2

Operating Conditions

Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . +12V ±10%

Ambient Temperature Range. . . . . . . . . . . . . . . . . . . . . 0oC to 70oC

Junction Temperature Range. . . . . . . . . . . . . . . . . . . .0oC to 125oC

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operationofthe
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

NOTE:

1. θJA is measured with the component mounted on an evaluation PC board in free air.

Electrical Specifications Recommended Operating Conditions, Unless Otherwise Noted

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS

SUPPLY CURRENT

V

CC

Nominal Supply I

CC

POWER-ON RESET

Rising VCC Threshold V
Falling VCC Threshold V
Rising V

Threshold - 1.26 - V

OCSET

OSCILLATOR

Free Running Frequency RT = OPEN 185 200 215 kHz
Total Variation 6kΩ < RT to GND < 200kΩ -15 - +15 %
Ramp Amplitude ∆V

OSC

REFERENCE and DAC

DAC(VID0-VID4) Input Low Voltage - - 0.8 V
DAC(VID0-VID4) Input High Voltage 2.0 - - V
DACOUT Voltage Accuracy -1.0 - +1.0 %

ERROR AMPLIFIER

DC Gain -88- dB
Gain-Bandwidth Product GBW - 15 - MHz
Slew Rate SR COMP = 10pF - 6 - V/µs

GATE DRIVERS

Upper Gate Source I
Upper Gate Sink R
Lower Gate Source I
Lower Gate Sink R

UGATE

UGATEILGATE

LGATE

LGATEILGATE

PROTECTION

Over-Voltage Trip (V
OCSET Current Source I
OVP Sourcing Current I
Soft Start Current I

/DACOUT) - 115 120 %

SEN

OCSETVOCSET

OVP

SS

UGATE and LGATE Open - 5 - mA

OCSET
OCSET

RT = Open - 1.9 - V

V

- V

BOOT

= 0.3A - 5.5 10 Ω

VCC = 12V, V

= 0.3A - 3.5 6.5 Ω

V

= 5.5V, V

SEN

Thermal Resistance (Typical, Note 1) θJA (oC/W)

SOIC Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

SOIC Package (with 3in2 of Copper) . . . . . . . . . . . 86

Maximum Junction Temperature (Plastic Package) . . . . . . . .150oC

Maximum Storage Temperature Range. . . . . . . . . . -65oC to 150oC

Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . .300oC

(SOIC - Lead Tips Only)

= 4.5V - - 10.4 V
= 4.5V 8.2 - - V

PHASE

= 4.5V

= 12V, V

= 6V 300 450 - mA

LGATE

DC

= 0V 60 - - mA

OVP

= 6V 350 500 - mA

UGATE

170 200 230 µA

-10- µA

P-P

2-64

HIP6004A

Electrical Specifications Recommended Operating Conditions, Unless Otherwise Noted (Continued)

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS

POWER GOOD

Upper Threshold (V
Lower Threshold (V
Hysteresis (V

SEN

PGOOD Voltage Low V

/DACOUT) V

SEN

/DACOUT) V

SEN

Rising 106 - 111 %

SEN

Falling 89 - 94 %

SEN

/DACOUT) Upper and Lower Threshold - 2 - %

PGOODIPGOOD

= -5mA - 0.5 - V

Typical Performance Curves

80

70

1000

100

RESISTANCE (kΩ)

10

RT PULLUP

TO +12V

RT PULLDOWN TO V

10 100 1000

SWITCHING FREQUENCY (kHz)

SS

60

C

= C

UPPER

0

100 200 300 400 500 600 700 800 900 1000

(mA)

CC

I

50

40

30

20

10

= C

LOWER

SWITCHING FREQUENCY (kHz)

GATE

C

GATE

C

= 3300pF

C

GATE

GATE

= 1000pF

= 10pF

FIGURE 1. RT RESISTANCE vs FREQUENCY FIGURE 2. BIAS SUPPLY CURRENT vs FREQUENCY

2-65