Intersil Corporation HIP6004DCB, HIP6004D Datasheet

TM

HIP6004D

Data Sheet April 2000

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

The HIP6004D 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 HIP6004D 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 HIP6004D includes a fully TTL­compatible 5-input digital-to-analog converter (DAC) that
adjusts the output voltage from 1.1V
increments steps.The precision referenceand voltage-mode
regulator hold the selected output voltage to within ±1% over
temperature and line voltage variations.

The HIP6004D provides simple, single feedback loop,
voltage-modecontrol with fasttransient 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%.

to 1.85VDCin 25mV

DC

File Number 4855

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

- 25mV Binary Steps . . . . . . . . . 1.100V

• 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

to 1.850V

DC

DC

The HIP6004D 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 HIP6004D
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 HIP6004D 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

HIP6004DCB 0 to 70 20 Ld SOIC M20.3

NOTE: When ordering, use the entire part number. Add the suffix T
to obtain the part in tape and reel, e.g., HIP6004DCB-T.

RANGE (oC) PACKAGE

PKG.

NO.

Applications

• Power Supply for K7™, and Other Microprocessors

•

High-Power DC-DC Regulators

•

Low-Voltage Distributed Power Supplies

Pinout

HIP6004D

(SOIC)

TOP VIEW

VSEN

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
VCC
LGATE
PGND
BOOT
UGATE
PHASE
PGOOD
GND

1

1-888-INTERSIL or 321-724-7143 | Intersil and Design is a trademark of Intersil Corporation. | Copyright © Intersil Corporation 2000

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

K7™ is a trademark of Advanced Micro Devices, Inc.

Typical Application

PGOOD

SS

OVP

+12V

HIP6004D

MONITOR AND

PROTECTION

VCC

HIP6004D

VIN = +5V OR +12V

OCSET
EN
BOOT

Block Diagram

VSEN

OCSET

RT

VID0
VID1
VID2
VID3
VID4

FB

REFERENCE

D/A

OSC

+

-

COMP

200µA

-

+

110%

90%

115%

VSEN

UGATE
PHASE

LGATE
PGND

GND

+

-

+

-

OVER-

VOLTAGE

+

-

+

-

OVER-

CURRENT

4V

VCC

POWER-ON

RESET (POR)

SOFT-

START

10µA

+V

OUT

PGOOD

OVP

SS

BOOT
UGATE

VID0
VID1
VID2
VID3
VID4

FB

COMP

RT

TTL D/A

CONVERTER

(DAC)

2

DACOUT

+

-

ERROR

AMP

PWM

COMPARATOR

+

-

OSCILLATOR

INHIBIT

PWM

PHASE

GATE

CONTROL

LOGIC

LGATE
PGND
GND

HIP6004D

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

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 an evaluation PC board in free air.

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

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 GBWP - 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 (VSEN/DACOUT) - 115 120 %
OCSET Current Source I
OVP Sourcing Current I
Soft Start Current I

OCSETVOCSET

OVP

SS

POWER GOOD

Upper Threshold (VSEN/DACOUT) VSEN Rising 106 - 111 %
Lower Threshold (VSEN/DACOUT) VSEN Falling 89 - 94 %
Hysteresis (VSEN/DACOUT) Upper and Lower Threshold - 2 - %
PGOOD Voltage Low V

PGOODIPGOOD

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 . . . . . . . . . . . . . . . . . . . . . . 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

= -5mA - 0.5 - V

P-P

3

Typical Performance Curves

1000

100

RESISTANCE (kΩ)

10

RT PULLUP

TO +12V

RT PULLDOWN TO V

SS

HIP6004D

(mA)

CC

I

80

C

70

60

C

= C

UPPER

50

40

30

20

10

LOWER

= C

GATE

GATE

C

C

= 3300pF

= 1000pF

GATE

= 10pF

GATE

10 100 1000

SWITCHING FREQUENCY (kHz)

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

Functional Pin Descriptions

1

VSEN

OCSET

SS
VID0
VID1
VID2
VID3
VID4

COMP

FB

2
3
4
5
6
7
8
9

10

VSEN (Pin 1)

This pin is connected to the converter’s 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

OCSETxROCSET

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

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.

VID0-4 (Pins 4-8)

VID0-4 are the input pins to the 5-bit DAC. The states of
these five pins program the internal voltage reference

20
19
18
17
16
15
14
13
12
11

RT
OVP
VCC
LGATE
PGND
BOOT
UGATE
PHASE
PGOOD
GND

DS(ON)

) set

0

100 200 300 400 500 600 700 800 900 1000

SWITCHING FREQUENCY (kHz)

(DACOUT). The level of DACOUT sets the converter output
voltage. It also sets the PGOOD and OVP thresholds. Table
1 specifies DACOUT for the all combinations of DAC inputs.

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 for the 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. Exception to this behavior is
the ‘11111’ VID pin combination which disables the
converter; in this case PGOOD asserts a high level.

PHASE (Pin 13)

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 14)

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

BOOT (Pin 15)

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

4