Intersil Corporation HIP6002 Datasheet

HIP6002

Data Sheet March 2000

Rectifier (PWM) Controller and Output
Voltage Monitor

The HIP6002 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 HIP6002 integrates all of the control, output
adjustment, monitoring and protectionfunctionsinto a single
package.

The output voltage of the converter is easily adjusted and
precisely regulated. The HIP6002 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 HIP6002 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/µs slew rate which enables high converter bandwidth for
fast transient performance. The resulting PWM duty ratio
ranges from 0% to 100%.

The HIP6002 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 HIP6002
protects against over-current conditions by inhibiting PWM
operation. Built-in over-voltage protection triggers an
external SCR to crowbar the input supply. The HIP6002
monitors the current by using the r

DS(ON)

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

Pinout

HIP6002 (SOIC)

TOP VIEW

File Number 4270.2

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

• 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 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®,PentiumPro,PowerPC™and
Alpha™ Microprocessors

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

• Low-Voltage Distributed Power Supplies

Ordering Information

TEMP.

PART NUMBER

HIP6002CB 0 to 70 20 Ld SOIC M20.3

RANGE (oC) PACKAGE

PKG.

NO.

VSEN

OCSET

SS
VID0
VID1
VID2
VID3

EN

COMP

FB

1
2
3
4
5
6
7
8
9

10

1

20
19
18
17
16
15
14
13
12
11

RT
OVP
VCC
LGATE
PGND
BOOT
UGATE
PHASE
PGOOD
GND

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.

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

HIP6002

Block Diagram

PGOOD

VID0
VID1
VID2
VID3

SS

OVP

RT

FB

OSC

D/A

+12V

VCC

MONITOR AND

PROTECTION

HIP6002

-

+

-

COMP

+

VSEN

GND

OCSET
EN
BOOT

UGATE
PHASE

LGATE
PGND

VIN = +5V OR +12V

VCC

+V

OUT

VSEN

OCSET

VID0
VID1
VID2
VID3

FB

COMP

RT

REFERENCE

D/A

CONVERTER

(DAC)

200µA

DACOUT

110%

90%

115%

+

-

ERROR

AMP

+

-

+

-

OVER-

VOLTAGE

+

-

+

-

OVER-

CURRENT

4V

COMPARATOR

OSCILLATOR

PWM

+

-

POWER-ON
RESET (POR)

SOFT-

START

INHIBIT

PWM

GATE

CONTROL

LOGIC

EN

PGOOD

10µA

OVP

SS
BOOT

UGATE
PHASE

LGATE
PGND
GND

2

HIP6002

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 to ±10%

Ambient Temperature Range. . . . . . . . . . . . . . . . . . . . . . 0o 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

Shutdown Supply EN = 0V - 50 100 µA

POWER-ON RESET

Rising VCC Threshold V
Falling VCC Threshold V
Enable - Input threshold Voltage V
Rising V

Threshold - 1.26 - V

OCSET

OSCILLATOR

Free Running Frequency RT = OPEN 185 200 215 kHz
Programmable 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 G
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 % Over Nominal DACOUT Voltage - 115 120 %
OCSET Current Source I
OVP Sourcing Current I
Soft Start Current I

OCSET

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

EN = VCC; UGATE and LGATE Open - 5 - mA

= 4.5V - - 10.4 V

OCSET

= 4.5V 8.2 - - V

OCSET

= 4.5V 0.8 - 2.0 V

OCSET

RT = OPEN - 1.9 - V

0

V

- V

BOOT

= 0.3A - 5.5 10 Ω

VCC = 12V, V

= 0.3A - 3.5 6.5 Ω

V

= 4.5V

OCSET

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

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

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

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

(SOIC - Lead Tips Only)

-88- dB

PHASE

LGATE

= 12V, V

= 6V 300 450 - mA

DC

= 0V 60 - - mA

OVP

= 6V 350 500 - mA

UGATE

170 200 230 µA

-10- µA

P-P

3

Typical Performance Curves

1000

100

RESISTANCE (kΩ)

10

RT PULLUP
TO +12V

10 100 1000

SWITCHING FREQUENCY (kHz)

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

RT PULLDOWN
TO V

SS

HIP6002

80

C

= C

UPPER

70

60

50

40

(mA)

CC

I

30

20

10

0

100 200 300 400 500 600 700 800 900 1000

= C

LOWER

SWITCHING FREQUENCY (kHz)

C

GATE

GATE

= 3300pF

C

GATE

= 1000pF

C

GATE

= 10pF

Functional Pin Description

1

VSEN

OCSET

SS
VID0
VID1
VID2
VID3

EN

COMP

FB

2
3
4
5
6
7
8
9

10

VSEN (Pin 1)

This pin is connected to the converters output voltage. The
PGOOD and OVP comparator circuits use this signal to
report output voltage status and for overvoltage protection.

OCSET (Pin 2)

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

•

I

PEAK

OCSROCSET

------------------------------------------- -=

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 3)

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

20
19
18
17
16
15
14
13
12
11

RT
OVP
VCC
LGATE
PGND
BOOT
UGATE
PHASE
PGOOD
GND

DS(ON)

) set

VID0-3 (Pins 4-7)

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.

EN (Pin 8)

This pin is the open-collector enable pin. Pull this pin below
1V to disable the converter. In shutdown, the soft start pin is
discharged and the UGATE pin is held low.

COMP (Pin 9) and FB (Pin 10)

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 11)

Signal ground forthe IC. All voltage levelsare measured with
respect to this pin.

PGOOD (Pin 12)

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 13)

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

UGATE (Pin 14)

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

4