2-281
HIP6020
Advanced Dual PWM and Dual Linear
Power Controller
The HIP6020 provides the power control and protection for
four output voltages in high-performance, graphics intensive
microprocessor and computer applications. The IC
integrates two PWM controllers and two linear controllers, as
well as the monitoring and protection functions into a 28-pin
SOIC package. One PWM controller regulates the
microprocessor core voltage with a synchronous-rectified
buck converter. The second PWM controller supplies the
computer system's AGP 1.5V or 3.3V bus power with a
standard buck converter. The linear controllers regulate
power for the 1.5V GTL bus and the 1.8V power for the
North/South Bridge core voltage and/or cache memory
circuits.
The HIP6020 includes an Intel-compatible, TTL 5-input
digital-to-analog converter (DAC) that adjusts the core PWM
output voltage from 1.3V
DC
to 2.05V
DC
in 0.05V steps and
from 2.1V
DC
to 3.5V
DC
in 0.1V increments. The precision
reference and voltage-mode control provide
1% static
regulation. The second PWM controller's output is user-
selectable, through a TTL-compatible signal applied at the
SELECT pin, for levels of 1.5V or 3.3V with
3% accuracy.
The linear regulators use external N-Channel MOSFETs or
bipolar NPN pass transistors to provide fixed output voltages
of 1.5V
3% (V
OUT3
) and 1.8V
3% (V
OUT4
).
The HIP6020 monitors all the output voltages. A single
Power Good signal is issued when the core is within
10% of
the DAC setting and all other outputs are above their under-
voltage 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
controllers' over-current 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.
Features
Provides 4 Regulated Voltages
- Microprocessor Core, AGP Bus, North/South Bridge
and/or Cache Memory, and GTL Bus Power
Drives N-Channel MOSFETs
Linear Regulator Drives Compatible with both MOSFET
and Bipolar Series Pass Transistors
Simple Single-Loop Control Designs
- Voltage-Mode PWM Control
Fast PWM Converter Transient Response
- High-Bandwidth Error Amplifiers
- Full 0% to 100% Duty Ratios
Excellent Output Voltage Regulation
- Core PWM Output:
1% Over Temperature
- AGP Bus PWM Output:
3% Over Temperature
- Other Outputs:
3% Over Temperature
TTL-Compatible 5 Bit DAC Microprocessor Core Output
Voltage Selection
- Wide Range . . . . . . . . . . . . . . . . . . . 1.3V
DC
to 3.5V
DC
Power-Good Output Voltage Monitor
Over-Voltage and Over-Current Fault Monitors
- Switching Regulators Do Not Require Extra Current
Sensing Elements, Use MOSFET's r
DS(ON)
Small Converter Size
- Constant Frequency Operation
- 200kHz Free-Running Oscillator; Programmable From
50kHz to Over 1MHz
- Small External Component Count
Applications
Motherboard Power Regulation for Computers
Pinout
HIP6020 (SOIC)
TOP VIEW
Ordering Information
PART NUMBER
TEMP.
RANGE (
o
C)
PACKAGE
PKG.
NO.
HIP6020CB
0 to 70
28 Ld SOIC
M28.3
HIP6020EVAL1
Evaluation Board
UGATE2
PHASE2
VID4
VID3
VSEN2
SELECT
SS
FAULT/RT
VSEN4
VCC
PGND
LGATE1
PHASE1
DRIVE3
COMP1
GND
VAUX
DRIVE4
UGATE1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
PGOOD
VID2
OCSET2
VSEN1
VSEN3
VID1
VID0
OCSET1
FB1
Data Sheet
February 1999
File Number
4683
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207
|
Copyright
Intersil Corporation 1999
2-282
Block Diagram
SOFT
-
ST
AR
T
INHIBIT
PWM
COMP1
ERR
OR
AMP1
VCC
PGOOD
PWM1
GND
VSEN1
OCSET1
VID0
VID1
VID2
VID3
FB1
COMP1
D
A
COUT
UGA
TE1
PHASE1
200
A
28
A
4.5V
+
-
+
-
+
-
+
-
VID4
LGA
TE1
PGND
DRIVE4
DRIVE3
VSEN3
+
-
INHIBIT
PWM2
UGA
TE2
PHASE2
ERR
OR
AMP2
PWM
COMP2
200
A
OCSET2
VSEN2
F
A
UL
T / R
T
+
-
+
-
GA
TE
CONTR
OL
+
-
1.26V
+
-
PO
WER-ON
RESET (POR)
TTL D/A
CONVER
TER
(D
A
C
)
OSCILLA
T
O
R
+
-
+
-
GA
TE
CONTR
OL
VCC
VCC
VCC
VCC
& F
A
UL
T
LOGIC
SS
1.5V
SYNCH
DRIVE
DRIVE1
DRIVE2
+
-
+
+
-
UNDER-
VO
L
T
AG
E
VSEN4
LINEAR
F
A
UL
T
OV
LUV
OC2
OC1
-
or
3.3V
+
-
SELECT
+
-
VA
U
X
VA
U
X
0.75
x
0.75
x
0.90
x
1.10
x
1.15
x
HIP6020
2-283
Simplified Power System Diagram
Typical Application
PWM1
+5V
IN
V
OUT1
Q1
Q2
Q3
V
OUT2
Q4
V
OUT3
V
OUT4
PWM2
LINEAR
LINEAR
HIP6020
CONTROLLER
CONTROLLER
CONTROLLER
CONTROLLER
+3.3V
IN
Q5
VID1
VID2
VID3
VID4
SS
GND
VCC
+5V
IN
VID0
+12V
IN
V
OUT1
PGND
VSEN1
PGOOD
LGATE1
UGATE1
OCSET1
PHASE1
Q1
Q2
POWERGOOD
FB1
COMP1
1.3V TO 3.5V
SELECT
UGATE2
PHASE2
Q3
CR2
VSEN2
DRIVE3
VSEN3
VSEN4
C
OUT4
1.5V
1.8V
C
OUT3
C
OUT2
C
IN
C
OUT1
Q4
L
OUT2
L
OUT1
HIP6020
V
OUT2
V
OUT3
V
OUT4
1.5V OR 3.3V
FAULT / RT
C
SS
Q5
+3.3V
IN
TYPEDET
L
IN
DRIVE4
VAUX
OCSET2
HIP6020
2-284
Absolute Maximum Ratings
Thermal Information
Supply Voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +15V
PGOOD, RT/FAULT, DRIVE, PHASE, and
GATE Voltage . . . . . . . . . . . . . . . . . . . GND - 0.3V to V
CC
+ 0.3V
Input, Output or I/O Voltage . . . . . . . . . . . . . . . . . . GND -0.3V to 7V
ESD Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Class 1
Operating Conditions
Supply Voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . +12V
10%
Ambient Temperature Range . . . . . . . . . . . . . . . . . . . . 0
o
C to 70
o
C
Junction Temperature Range . . . . . . . . . . . . . . . . . . . 0
o
C to 125
o
C
Thermal Resistance (Typical, Note 1)
JA
(
o
C/W)
SOIC Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
70
Maximum Junction Temperature (Plastic Package) . . . . . . . .150
o
C
Maximum Storage Temperature Range . . . . . . . . . . -65
o
C to 150
o
C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . .300
o
C
(SOIC - Lead Tips Only)
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.
JA
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 Current
I
CC
UGATE1, LGATE1, UGATE2, DRIVE3, and
DRIVE4 Open
-
9
-
mA
POWER-ON RESET
Rising VCC Threshold
V
OCSET
= 4.5V
-
-
10.4
V
Falling VCC Threshold
V
OCSET
= 4.5V
8.2
-
-
V
Rising VAUX Threshold
V
OCSET
= 4.5V
-
2.5
-
V
VAUX Threshold Hysteresis
V
OCSET
= 4.5V
-
0.5
-
V
Rising V
OCSET1
Threshold
-
1.26
-
V
OSCILLATOR
Free Running Frequency
F
OSC
RT = OPEN
185
200
215
kHz
Total Variation
6k
< RT to GND < 200k
-15
-
+15
%
Ramp Amplitude
V
OSC
RT = Open
-
1.9
-
V
P-P
DAC AND STANDARD BUCK REGULATOR REFERENCE
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
%
PWM2 Reference Voltage
SELECT < 0.8V
-
1.5
-
V
PWM2 Reference Voltage
SELECT > 2.0V
-
3.3
-
V
PWM2 Reference Voltage Tolerance
-
3
-
%
1.5V AND 1.8V LINEAR REGULATORS (V
OUT3
AND V
OUT4
)
Regulation
-
3
-
%
VSEN3 Regulation Voltage
VREG
3
-
1.5
-
V
VSEN4 Regulation Voltage
VREG
4
-
1.8
-
V
VSEN3,4 Under-Voltage Level
VSEN3
UV
VSEN3 Rising
-
75
-
%
VSEN3,4 Under-Voltage Hysteresis
VSEN3 Falling
-
7
-
%
Output Drive Current
VAUX-V
DRIVE
> 0.6V
20
40
-
mA
SYNCHRONOUS PWM CONTROLLER ERROR AMPLIFIER
DC Gain
-
88
-
dB
Gain-Bandwidth Product
GBWP
-
15
-
MHz
Slew Rate
SR
COMP1 = 10pF
-
6
-
V/
s
HIP6020
2-285
Functional Pin Descriptions
VCC (Pin 28)
Provide a 12V bias supply for the IC to this pin. This pin also
provides the gate bias charge for all the MOSFETs
controlled by the IC. The voltage at this pin is monitored for
Power-On Reset (POR) purposes.
GND (Pin 17)
Signal ground for the IC. All voltage levels are measured with
respect to this pin.
PGND (Pin 24)
This is the power ground connection. Tie the synchronous
PWM converter's lower MOSFET source to this pin.
VAUX (Pin 16)
The +3.3V input voltage at this pin is monitored for power-on
reset (POR) purposes. Connected to +5V input, this pin
provides boost current for the two linear regulator output
drives in the event bipolar NPN transistors (instead of
N-channel MOSFETs) are employed as pass elements.
PWM CONTROLLERS GATE DRIVERS
UGATE1,2 Source
I
UGATE
VCC = 12V, V
UGATE1
(or V
UGATE2
) = 6V
-
1
-
A
UGATE1,2 Sink
R
UGATE
V
GATE-PHASE
= 1V
-
1.7
3.5
LGATE Source
I
LGATE
VCC = 12V, V
LGATE1
= 1V
-
1
-
A
LGATE Sink
R
LGATE
V
LGATE
= 1V
-
1.4
3.0
PROTECTION
VSEN1 Over-Voltage (VSEN1/DACOUT)
VSEN1 Rising
-
115
120
%
FAULT Sourcing Current
I
OVP
V
FAULT/RT
= 2.0V
-
8.5
-
mA
OCSET1,2 Current Source
I
OCSET
V
OCSET
= 4.5V
DC
170
200
230
A
Soft-Start Current
I
SS
-
28
-
A
POWER GOOD
VSEN1 Upper Threshold
(VSEN1/DACOUT)
VSEN1 Rising
108
-
110
%
VSEN1 Under-Voltage
(VSEN1/DACOUT)
VSEN1 Rising
92
-
94
%
VSEN1 Hysteresis (VSEN1/DACOUT)
Upper/Lower Threshold
-
2
-
%
PGOOD Voltage Low
V
PGOOD
I
PGOOD
= -4mA
-
-
0.8
V
Electrical Specifications
Recommended Operating Conditions, Unless Otherwise Noted. Refer to Figures 1, 2 and 3 (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Typical Performance Curves
FIGURE 1. R
T
RESISTANCE vs FREQUENCY
FIGURE 2. BIAS SUPPLY CURRENT vs FREQUENCY
10
100
1000
SWITCHING FREQUENCY (kHz)
RESIST
ANCE (k
)
10
100
1000
R
T
PULLUP
TO +12V
R
T
PULLDOWN TO V
SS
100
200
300
400
500
600
700
800
900
1000
I
CC
(mA)
SWITCHING FREQUENCY (kHz)
140
120
100
80
60
40
20
0
C = 660pF
C = 1500pF
C = 3600pF
C = 4800pF
C
UGATE1
= C
UGATE2
= C
LGATE1
= C
V
IN
= 5V
V
CC
= 12V
HIP6020
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