Intersil Corporation HIP6005A Datasheet

HIP6005A

Data Sheet September 1997 File Number

Buck Pulse-Width Modulator (PWM)
Controller and Output Voltage Monitor

The HIP6005A provides complete control and protection for
a DC-DC converter optimized for high-performance
microprocessor applications. It is designed to drive an
N-Channel MOSFET in a standard buck topology. The
HIP6005A 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 HIP6005A includes a fully TTL­compatible 5-input digital-to-analog converter (DAC) that
adjusts the output voltage from 2.1V
increments and from 1.8V

to 2.05VDC in 0.05V steps.

DC

The precision referenceandvoltage-moderegulatorholdthe
selected output voltage to within ±1% over temperature and
line voltage variations.

The HIP6005A provides simple, single feedback loop, voltage­mode 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 f eatures
a 15MHz gain-bandwidth product and 6V/µs slew rate which
enables high converter bandwidth for f ast tr ansient
performance.TheresultingPWMdutyratio ranges from 0% to
100%.

The HIP6005A 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 HIP6005A
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 HIP6005A monitors the current by using the
r

DS(ON)

of the upper MOSFET which eliminates the need for

a current sensing resistor.

to 3.5VDC in 0.1V

DC

4418.1

Features

• Drives N-Channel MOSFET

• 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

DC
DC
DC

Ordering Information

TEMP.

PART NUMBER

HIP6005ACB 0 to 70 20 Ld SOIC M20.3

RANGE (oC) PACKAGE

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.

2-98

PKG.

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

NO.

Pinout

HIP6005A

TOP VIEW

1

V

SEN

OCSET

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

SS
VID0
VID1
VID2
VID3
VID4

COMP

FB

2
3
4
5
6
7
8
9

10

(SOIC)

R

20

T

OVP

19

V

18

CC

NC

17

NC

16

BOOT

15

UGATE

14

PHASE

13
12

PGOOD
GND

11

| Copyright © Intersil Corporation 1999

Typical Application

PGOOD

VID0
VID1
VID2
VID3
VID4

SS

OVP

RT

FB

OSC

D/A

+12V

MONITOR AND

PROTECTION

HIP6005A

+

-

HIP6005A

V

CC

OCSET

BOOT

UGATE
PHASE

-

+

VIN = +5V OR +12V

+V

OUT

Block Diagram

V

SEN

OCSET

VID0
VID1
VID2
VID3
VID4

FB

REFERENCE

D/A

CONVERTER

(DAC)

COMP

200µA

DACOUT

110%

90%

115%

V

SEN

+

-

ERROR

AMP

GND

+

-

+

-

OVER-

VOLTAGE

+

-

+

-

OVER-

CURRENT

COMPARATOR

4V

PWM

POWER-ON

RESET (POR)

+

-

V

CC

SOFT-

START

INHIBIT

PWM

GATE

CONTROL

LOGIC

PGOOD

10µA

OVP

SS

BOOT
UGATE
PHASE

COMP

RT

OSCILLATOR

GND

2-99

HIP6005A

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 DRIVER

Upper Gate Source I
Upper Gate Sink

UGATE

R

UGATE

PROTECTION

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

/DACOUT) - 115 120 %

SEN

OCSET

OVP

SS

UGATE Open - 5 - mA

OCSET
OCSET

RT = Open - 1.9 - V

V

- V

BOOT

V

OCSET

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

= 12V, V

= 6V 350 500 - mA

UGATE

- 5.5 10 Ω

= 4.5V 170 200 230 µA

= 0V 60 - - mA

OVP

-10- µA

P-P

2-100

HIP6005A

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

/DACOUT) V

SEN

/DACOUT) V

SEN

/DACOUT) Upper and Lower Threshold - 2 - %

PGOOD Voltage Low V

Typical Performance Curves

1000

100

RESISTANCE (kΩ)

10

RT PULLUP
TO +12V

RT PULLDOWN TO V

10 100 1000

SWITCHING FREQUENCY (kHz)

Rising 106 - 111 %

SEN

Falling 89 - 94 %

SEN

PGOODIPGOOD

SS

= -5mA - 0.5 - V

40

35

C

= 3300pF

30

25

20

(mA)

CC

I

15

10

5

0

100 200 300 400 500 600 700 800 900 1000

UGATE

C

= 1000pF

UGATE

C

UGATE

SWITCHING FREQUENCY (kHz)

= 10pF

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

2-101