Intersil Corporation HIP6003 Datasheet

HIP6003

Data Sheet March 2000

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

The HIP6003 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
HIP6003 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 HIP6003 includes a 4-Input
Digital-to-Analog Converter (DAC) that adjusts the output
voltage from 2.0VDC to 3.5VDC in 0.1V increments. The
precision reference and voltage-mode regulator hold the
selected output voltage to within ±1% over temperature and
line voltage variations.

The HIP6003 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 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 HIP6003 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 HIP6003
protects against over-current conditions by inhibiting PWM
operation. Built-in over-voltage protection triggers an
external SCR to crowbar the input supply. The HIP6003
monitors the current by using the r

DS(ON)

of the upper
MOSFET which eliminates the need for a current sensing
resistor.

Ordering Information

TEMP.

PART NUMBER

HIP6003CB 0 to 70 16 Ld SOIC M16.15

RANGE (oC) PACKAGE

PKG.

NO.

File Number 4274.2

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

• 4-Bit Digital-to-Analog Output Voltage Selection

- Wide Range . . . . . . . . . . . . . . . . . . .2.0VDC to 3.5VDC

- 0.1V Binary Steps

• Power-Good Output Voltage Monitor

• Over-Voltage and Over-Current Fault Monitors

- Does Not Require Extra Current Sensing Element

- Uses MOSFETs 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, PowerPC™and
Alpha™ Microprocessors

•

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

•

Low-Voltage Distributed Power Supplies

Pinout

HIP6003

(SOIC)

TOP VIEW

16
15
14
13
12
11
10

9

VSEN
RT/OVP
VCC
BOOT
UGATE
PHASE
PGOOD
GND

OCSET

SS
VID0
VID1
VID2
VID3

COMP

FB

1
2
3
4
5
6
7
8

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

Pentium® is a registered trademark of Intel Corporation.

PowerPC™ is a registered trademark of IBM.

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

1-888-INTERSIL or 321-724-7143

| Copyright © Intersil Corporation 2000

Typical Application

HIP6003

Block Diagram

PGOOD

RT/OVP

VID0
VID1
VID2
VID3

SS

FB

OSC

D/A

+12V

VCC

MONITOR AND

PROTECTION

HIP6003

-

+

-

COMP

+

VSEN

GND

OCSET

BOOT

UGATE
PHASE

VIN = +5V OR +12V

VCC

+V

OUT

VSEN

OCSET

VID0
VID1
VID2
VID3

FB

COMP

REFERENCE

D/A

CONVERTER

(DAC)

110%

90%

115%

200µA

DACOUT

+

-

ERROR

AMP

+

-

+

-

OVER-

VOLTAGE

+

-

+

-

OVER-

CURRENT

4V

COMPARATOR

OSCILLATOR

PWM

+

-

POWER-ON

RESET (POR)

SOFT-

START

INHIBIT

CONTROL

PWM

PGOOD

10µA

SS

BOOT
UGATE

PHASE

GATE

LOGIC

GND

RT/OVP

2

HIP6003

Absolute Maximum Ratings Thermal Information

Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +15.0V

Boot Voltage, V

BOOT

- V

. . . . . . . . . . . . . . . . . . . . . . . +15.0V

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 operation of the
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 a low effective thermal conductivity test board in free air. See Tech Brief 379 for details.

Electrical Specifications Recommended Operating Conditions, unless otherwise noted.

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS

VCC SUPPLY CURRENT

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

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 R

UGATE

UGATE

PROTECTION

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

/DACOUT) - 115 120 %

SEN

OCSETVOCSET

OVP

SS

POWER GOOD

Upper Threshold (V
Lower Threshold (V
Hysteresis (V

SEN

PGOOD Voltage Low V

/DACOUT) V

SEN

/DACOUT) V

SEN

/DACOUT) Upper and Lower Threshold - 2 - %

PGOODIPGOOD

UGATE Open - 5 - mA

= 4.5V - - 10.4 V

OCSET

= 4.5V 8.2 - - V

OCSET

RT = OPEN - 1.9 - V

V

- V

BOOT

= 4.5VDC 170 200 230 µA

V

= 5.5V; V

SEN

Rising 106 - 111 %

SEN

Falling 89 - 94 %

SEN

= -5mA - 0.5 - V

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

SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

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

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

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

(SOIC - Lead Tips Only)

PHASE

= 12V, V

= 6V 350 500 - mA

UGATE

- 5.5 10 Ω

= 0V 60 - - mA

OVP

-10- µA

P-P

3

Typical Performance Curves

1000

100

RESISTANCE (kΩ)

10

RT PULLUP
TO +12V

RT PULLDOWN
TO V

SS

HIP6003

(mA)

CC

I

40

35

C

= 3300pF

30

25

20

15

10

5

UGATE

C

UGATE

= 1000pF

C

UGATE

= 10pF

10 100 1000

SWITCHING FREQUENCY (kHz)

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

Functional Pin Description

16

SS
VID0
VID1
VID2
VID3

COMP

FB

1
2
3
4
5
6
7
8

OCSET

OCSET (Pin 1)

Connect a resistor (R
upper MOSFET. R
(I

), and the upper MOSFET on-resistance. (r

OCS

OCSET

the converter over-current (OC) trip point according to the
following equation:

I

•

OCSROCSET

I

PEAK

------------------------------------------- -

=

r

DS ON()

An over-current trip cycles the soft-start function.

) from this pin to the drain of the

OCSET

, an internal 200µA current source

SS (Pin 2)

Connect a capacitor from this pin to ground. This capacitor,
along with an internal 10µA current source, sets the soft­start interval of the converter.

VID0-3 (Pins 3-6)

VID0-3 are the input pins to the 4-bit DAC. The states of
these four pins program the internal voltage reference
(DACOUT). The level of DACOUT sets the converter output
voltage. It also sets the PGOOD and OVP thresholds. Table
1 specifies DACOUT for the 16 combinations of DAC inputs.

15
14
13
12
11
10

9

VSEN
RT/OVP
VCC
BOOT
UGATE
PHASE
PGOOD
GND

DS(ON)

) set

0

100 200 300 400 500 600 700 800 900 1000

SWITCHING FREQUENCY (kHz)

COMP (Pin 7) and FB (Pin 8)

COMP and FB are the available external pins of the error
amplifier. The FB pin is the inverting input of the error
amplifier and the COMP pin is the error amplifier output.
These pins are used to compensate the voltage-control
feedback loop of the converter.

GND (Pin 9)

Signal ground for the IC.All voltage levels are measured with
respect to this pin.

PGOOD (Pin 10)

PGOOD is an open collector output used to indicate the
status of the converter output voltage. This pin is pulled low
when the converter output is not within ±10% of the
DACOUT reference voltage.

PHASE (Pin 11)

Connect the PHASE pin to the upper MOSFET source. This
pin is used to monitor the voltage drop across the MOSFET
for over-current protection. This pin also provides the return
path for the upper gate drive.

UGATE (Pin 12)

Connect UGATE to the upper MOSFET gate. This pin
provides the gate drive for the upper MOSFET.

BOOT (Pin 13)

This pin provides bias voltage to the upper MOSFET driver.
A bootstrap circuit may be used to create a BOOT voltage
suitable to drive a standard N-Channel MOSFET.

VCC (Pin 14)

Provide a 12V bias supply for the chip to this pin.

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