Intersil Corporation HIP6018B Datasheet

HIP6018B

Data Sheet May 1999 File Number

Advanced PWM and Dual Linear Power
Control

The HIP6018B provides the power control and protection for
three output voltages in high-performance microprocessor
and computer applications. The IC integrates a PWM
controllers, a linear regulator and a linear controller as well
as the monitoring and protection functions into a single
package. The PWM controller regulates the microprocessor
core voltage with a synchronous-rectified buck converter.
The linear controller regulates power for the GTL bus and
the linear regulator provides powerfor the clock driver circuit.

The HIP6018B includes an Intel-compatible, TTL 5-input
digital-to-analog converter (DAC) that adjusts the core PWM
output voltage from 2.1VDC to 3.5VDC in 0.1V increments
and from 1.3VDC to 2.05VDC in 0.05V steps. The precision
reference and voltage-mode control provide±1% static
regulation. The linear regulator uses an internal pass device
to provide 2.5V ±2.5%. The linear controller drives an
external N-channel MOSFET to provide 1.5V ±2.5%.

The HIP6018B monitors all the output voltages. A single
Power Good signal is issued when the core is within 10% of
the DAC setting and the other levels are above their under­voltage levels. Additional built-in over-voltage protection for
the core output uses the lower MOSFET to prevent output
voltages above 115% of the DAC setting. The PWM over­current function monitors the output current by using the
voltage drop across the upper MOSFET’s r

DS(ON)

,

eliminating the need for a current sensing resistor.

Pinout

HIP6018B

(SOIC)

TOP VIEW

24
23
22
21
20
19
18
17
16
15
14
13

UGATE1
PHASE1
LGATE1
PGND
OCSET1
VSEN1
FB1
COMP1
FB3
DRIVE3
GND
VOUT2

VCC
VID4
VID3
VID2
VID1
VID0

PGOOD

FAULT

SS
RT

FB2

VIN2

1
2
3
4
5
6
7
8

9
10
11
12

4586.1

Features

• Provides 3 Regulated Voltages

- Microprocessor Core, Clock and GTL Power

• Drives N-Channel MOSFETs

• Operates from +3.3V, +5V and +12V Inputs

• Simple Single-Loop PWM Control Design

- Voltage-Mode Control

• Fast Transient Response

- High-Bandwidth Error Amplifier

- Full 0% to 100% Duty Ratios

• Excellent Output Voltage Regulation

- Core PWM Output: ±1% Over Temperature

- Other Outputs: ±2.5% Over Temperature

• TTL-Compatible 5-Bit Digital-to-Analog Core Output
Voltage Selection

- Wide Range . . . . . . . . . . . . . . . . . . . 1.3V

DC

to 3.5V

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

- 0.05V Steps . . . . . . . . . . . . . . . . . . 1.3VDC to 2.05V

• Power-Good Output Voltage Monitor

• Microprocessor Core Voltage Protection Against Shorted
MOSFET

• 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

•

Full Motherboard Power Regulation for Computers

•

Low-Voltage Distributed Power Supplies

Ordering Information

TEMP.

PART NUMBER

HIP6018BCB 0 to 70 24 Ld SOIC M24.3

RANGE (oC) PACKAGE

PKG.

NO.

DC
DC
DC

2-238

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

www.intersil.com or 407-727-9207

| Copyright © Intersil Corporation 1999

Block Diagram

HIP6018B

VCC

OCSET1

VSEN1

3V

POWER-ON

RESET (POR)

200mA

+

110%

LINEAR

UNDER-

VOLTAGE

+

-

-

PGOOD

+

90%

-

+

DRIVE

LOWER

PGND

TTL D/A

4V

GND

CONVERTER

RT

OSCILLATOR

FB1 COMP1

VID4

VID3

(DAC)

VID2

VID1

VID0

UGATE1

PHASE1

VCC

DRIVE

UPPER

GATE

INHIBIT

-

+

OC1

-

+

115%

-

LUV

OC2

OV

+

SOFT-

LOGIC

START

& FAULT

CONTROL

+

-

VCC

PWM

-

PWM

COMP

ERROR

DACOUT

LGATE1

AMP

11µA

FB3

2-239

0.3V

-

+

DRIVE3

-

+

INHIBIT

3V

VIN2

VCC

SS

1.26V

-

+

-

+

-

+

0.23A

FB2

VOUT2

FAULT

FIGURE 1.

Simplified Power System Diagram

+5V

IN

HIP6018B

+3.3V

IN

V

OUT2

V

OUT3

Typical Application

+12V

IN

+5V

IN

+3.3V

IN

V

OUT2

2.5V
C

OUT2

Q1

Q2

V

OUT1

Q3

LINEAR

REGULATOR

HIP6018B

LINEAR

CONTROLLER

PWM1

CONTROLLER

FIGURE 2.

C

IN

VCC

VIN2

VOUT2

FB2

OCSET1

PGOOD

UGATE1
PHASE1

Q1

POWERGOOD

L

OUT1

V

OUT1

1.3V TO 3.5V

V

OUT3

1.5V
C

Q3

OUT3

2-240

DRIVE3

FB3

VID0
VID1
VID2
VID3
VID4

HIP6018B

GND

FIGURE 3.

LGATE1
PGND

VSEN1

FB1

COMP1

FAULT
RT

SS

Q2

CR1

C

SS

C

OUT1

HIP6018B

Absolute Maximum Ratings Thermal Information

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

PGOOD, R T, FA ULT, and GATE Voltage . . . GND - 0.3V to VCC + 0.3V

Input, Output or I/O Voltage. . . . . . . . . . . . . . . . . . GND -0.3V to 7V

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. Refer to Figures 1, 2 and 3

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS

VCC SUPPLY CURRENT

Nominal Supply I

POWER-ON RESET

Rising VCC Threshold V
Falling VCC Threshold V
Rising VIN2 Under-Voltage Threshold 2.45 2.55 2.65 V
VIN2 Under-Voltage Hysteresis - 100 - mV
Rising V

OSCILLATOR

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

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 %
Reference Voltage (Pin FB2 and FB3) 1.240 1.265 1.290 V

LINEAR REGULATOR

Regulation 10mA < I
Under-Voltage Level FB2
Under-Voltage Hysteresis -6- %
Over-Current Protection 180 230 - mA
Over-Current Protection During Start-Up 560 700 - mA

LINEAR CONTROLLER

Regulation VSEN3 = DRIVE3, 0 < I
Under-Voltage Level FB3
Under-Voltage Hysteresis -6- %
Output Drive Current I
DRIVE3 Source Current VIN2 - DRIVE3 > 0.6V 20 40 - mA

Threshold - 1.25 - V

OCSET1

CC

OSC

DRIVE3

UGATE1, DRIVE3, LGATE1, and VOUT2 Open - 8 - mA

= 4.5V 8.6 - 10.4 V

OCSET

= 4.5V 8.2 - 10.2 V

OCSET

RT = Open - 1.9 - V

VOUT2

FB2 Rising - 75 87 %

UV

FB3 Rising - 75 87 %

UV

VIN2 - V

OUT3

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

SOIC Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

SOIC Package (with 3 in2 of copper) . . . . . . . . . . . 65

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

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

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

(SOIC - Lead Tips Only)

P-P

< 150mA -2.5 - 2.5 %

< 20mA -2.5 - 2.5 %

DRIVE3

> 1.5V 20 40 - mA

2-241

HIP6018B

Electrical Specifications Recommended Operating Conditions, Unless Otherwise Noted. Refer to Figures 1, 2 and 3 (Continued)

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS

PWM CONTROLLER ERROR AMPLIFIER

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

PWM CONTROLLER GATE DRIVER

Upper Drive Source I
Upper Drive Sink R
Lower Drive Source I
Lower Drive Sink R

UGATE

UGATEVUGATE1-PHASE1

LGATE

LGATEVLGATE1

PROTECTION

V

Over-Voltage Trip VSEN1 Rising 112 115 118 %

OUT1

FAULT Sourcing Current I
OCSET1 Current Source I
Soft-Start Current I

OVP

OCSETVOCSET

SS

Chip Shutdown Soft-Start Threshold - - 1.0 V

POWER GOOD

V

Upper Threshold VSEN1 Rising 108 - 110 %

OUT1

V

Under Voltage VSEN1 Rising 92 - 94 %

OUT1

V

Hysteresis (VSEN1 / DACOUT) Upper/Lower Threshold - 2 - %

OUT1

PGOOD Voltage Low V

PGOODIPGOOD

VCC = 12V, V

UGATE1

(or V

) = 6V - 1 - A

GATE2

= 1V - 1.7 3.5 Ω

VCC = 12V, V

= 1V - 1 - A

LGATE1

= 1V - 1.4 3.0 Ω

V

= 10V 10 14 - mA

FAULT

= 4.5V

DC

170 200 230 µA

-11- µA

= -4mA - - 0.5 V

Typical Performance Curves

1000

100

RESISTANCE (kΩ)

10

RT PULLUP

TO +12V

RT PULLDOWN TO V

10 100 1000

SWITCHING FREQUENCY (kHz)

FIGURE 4. RT RESISTANCE vs FREQUENCY FIGURE 5. BIAS SUPPLY CURRENT vs FREQUENCY

SS

100

80

60

(mA)

CC

I

40

20

C

UGATE1

V

VCC

0

100 200

= C

= 12V, VIN = 5V

300 400

= C

LGATE1

SWITCHING FREQUENCY (kHz)

GATE

500

C

= 4800pF

GATE

C

= 3600pF

GATE

C

= 1500pF

GATE

C

= 660pF

GATE

600 700 800 900

1000

2-242