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HIP6301
1
File Number
4765.1
HIP6301
Microprocessor CORE Voltage Regulator
Multi-Phase Buck PWM Controller
The HIP6301 multi-phase PWM control IC together with its
companion gate drivers, the HIP6601, HIP6602 or HIP6603
and internal MOSFETs provides a precision voltage
regulation system for advanced microprocessors.
Multiphase power conversion is a marked departure from
earlier single phase converter congurations previously
employed to satisfy the ever increasing current demands of
modern microprocessors. Multi-phase convertors, by
distributing the power and load current results in smaller and
lower cost transistors with fewer input and output capacitors.
These reductions accrue from the higher effective
conversion frequency with higher frequency ripple current
due to the phase interleaving process of this topology. For
example, a three phase convertor operating at 350kHz will
have a ripple frequency of 1.05MHz. Moreover, greater
convertor bandwidth of this design results in faster response
to load transients.
Outstanding features of this controller IC include
programmable VID codes from the microprocessor that
range from 1.100V to 1.850V with a system accuracy of
±
1%. Pull up currents on these VID pins eliminates the need
for external pull up resistors. In addition droop
compensation, used to reduce the overshoot or undershoot
of the CORE voltage, is easily programmed with a single
resistor.
Another feature of this controller IC is the PGOOD monitor
circuit which is held low until the CORE voltage increases,
during its Soft-Start sequence, to within 10% of the
programmed voltage. Over-voltage, 15% above programmed
CORE voltage, results in the converter shutting down and
turning the lower MOSFETs ON to clamp and protect the
microprocessor. Under voltage is also detected and results
in PGOOD low if the CORE voltage falls 10% below the
programmed level. Over-current protection reduces the
regulator current to less than 25% of the programmed trip
value. These features provide monitoring and protection for
the microprocessor and power system.
Features
Multi-Phase Power Conversion
Precision Channel Current Sharing
- Loss Less Current Sampling - Uses r
DS(ON)
Precision CORE Voltage Regulation
-
±
1% System Accuracy Over Temperature
Microprocessor Voltage Identication Input
- 5-Bit VID Input
- 1.100V to 1.850V in 25mV Steps
- Programmable Droop Voltage
Fast Transient Recovery Time
Over Current Protection
Automatic Selection of 2, 3, or 4 Phase Operation
High Ripple Frequency, (Channel Frequency) Times
Number Channels . . . . . . . . . . . . . . . . . 100kHz to 6MHz
Pinout
HIP6301 (SOIC)
TOP VIEW
Ordering Information
PART NUMBER
TEMP. (
o
C)
PACKAGE
PKG. NO.
HIP6301CB
0 to 70
20 Ld SOIC
M20.3
HIP6301CB-T
20 Ld SOIC Tape and Reel
HIP6301EVAL1
Evaluation Platform
11
12
13
14
15
16
17
18
20
19
10
9
8
7
6
5
4
3
2
1
VID4
VID3
VID2
VID1
VID0
FS/DIS
PWM2
PGOOD
PWM3
ISEN4
ISEN1
V
CC
GND
ISEN3
FB
PWM4
VSEN
COMP
PWM1
ISEN2
Data Sheet
March 2000
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Copyright
©
Intersil Corporation 2000 2
Block Diagram D/A
CURRENT
CORRECTION
OV
LATCH
POWER-ON
RESET (POR)
SOFT-
START
AND FAULT
LOGIC
CHANNEL
DETECTOR
+
-
+
-
UV
OVP
+
-
E/A
+
-
PWM
PWM
OC
+
-
PWM1
PWM2
PWM3
PWM4
GND
PGOOD
V
CC
FB
I_TRIP
FS/EN
S
STATE
I_TOT
+
-
+
-
+
-
+
-
+
+
+
+
+
-
PHASE
+
-
PWM
+
-
PWM
CLOCK AND
NUMBER
THREE
VID0
VID1
VID2
VID3
COMP
VSEN
GENERATOR
SAWTOOTH
X1.15
X 0.9
ISEN1
ISEN2
ISEN3
ISEN4
VID4
HIP6301 3
Simplied Power System Diagram
Functional Pin Description
VID4 (Pin 1), VID3(Pin 2), VID2 (Pin 3), VID1(Pin 4)
and VID0 (Pin 5)
Voltage Identification inputs from microprocessor. These pins
respond to TTL and 3.3V logic signals. The HIP6301 decodes
VID bits to establish the output voltage. See Table 1.
COMP (Pin 6)
Output of the internal error amplier. Connect this pin to the
external feedback and compensation network.
FB (Pin 7)
Inverting input of the internal error amplier.
FS/DIS (Pin 8)
Channel frequency, F
SW
, select and disable. A resistor from
this pin to ground sets the switching frequency of the
converter. Pulling this pin to ground disables the converter
and three states the PWM outputs. See Figure 10.
GND (Pin 9)
Bias and reference ground. All signals are referenced to this
pin.
VSEN (Pin 10)
Power good monitor input. Connect to the microprocessor-
CORE voltage.
PWM1 (Pin 15), PWM2 (Pin 14), PWM3 (Pin 11) and
PWM4 (Pin 18)
PWM outputs for each driven channel in use. Connect these
pins to the PWM input of a HIP6601/2/3 driver. For systems
which use 3 channels, connect PWM4 high. Two channel
systems connect PWM3 and PWM4 high.
ISEN1 (Pin 16), ISEN2 (Pin 13), ISEN3 (Pin 12) and
ISEN4 (Pin 17)
Current sense inputs from the individual converter channels
phase nodes. Unused sense lines MUST be left open.
PGOOD (Pin 19)
Power good. This pin provides a logic-high signal when the
microprocessor CORE voltage (VSEN pin) is within specied
limits and Soft-Start has timed out.
V
CC
(Pin 20)
Bias supply. Connect this pin to a 5V supply.
SYNCHRONOUS
HIP6301
MICROPROCESSOR
VSEN
VID
RECTIFIED BUCK
CHANNEL
SYNCHRONOUS
RECTIFIED BUCK
CHANNEL
SYNCHRONOUS
RECTIFIED BUCK
CHANNEL
SYNCHRONOUS
RECTIFIED BUCK
CHANNEL
PWM 1
PWM 2
PWM 3
PWM 4
11
12
13
14
15
16
17
18
20
19
10
9
8
7
6
5
4
3
2
1
VID4
VID3
VID2
VID1
VID0
FS/DIS
PWM2
PGOOD
PWM3
ISEN4
ISEN1
V
CC
GND
ISEN3
FB
PWM4
VSEN
COMP
PWM1
ISEN2
HIP6301
HIP6301 4
Typical Application - 2 Phase Converter Using HIP6601 Gate Drivers
MAIN
CONTROL
HIP6301
VID3
VID0
PGOOD
FB
+5V
COMP
PWM3
PWM2
PWM1
ISEN3
ISEN2
ISEN1
VSEN
DRIVER
HIP6601
PWM
VCC
BOOT
UGATE
PHASE
LGATE
V
IN
= +5V
PVCC
PWM
VCC
BOOT
UGATE
PHASE
LGATE
V
IN
= +5V
DRIVER
HIP6601
PVCC
FS/DIS
PWM4
ISEN4
NC
GND
GND
GND
V
CC
+V
CORE
NC
+12V
+12V
VID2
VID4
VID1
HIP6301 5
HIP6301
Typical Application - 4 Phase Converter Using HIP6602 Gate Drivers
VID3
VID2
VID1
VID0
FB
+5V
COMP
PWM1
PWM2
ISEN2
PWM3
PWM4
ISEN4
VSEN
FS/DIS
ISEN1
ISEN3
GND
V
IN
+12V
BOOT2
UGATE2
PHASE2
LGATE2
BOOT1
UGATE1
PHASE1
LGATE1
PWM1
PVCC
+5V
V
CC
V
IN
= +12V
+12V
DUAL
DRIVER
HIP6602
V
IN
+12V
BOOT4
UGATE4
PHASE4
LGATE4
BOOT3
UGATE3
PHASE3
LGATE3
PWM3
PVCC
+5V
V
CC
V
IN
+12V
+12V
DUAL
DRIVER
HIP6602
PGOOD
GND
GND
V
CC
+V
CORE
L
01
L
02
L
03
L
04
PWM2
PWM4
MAIN
CONTROL
HIP6301
VID4 6
Absolute Maximum Ratings
Supply Voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +7V
Input, Output, or I/O Voltage . . . . . . . . . . GND -0.3V to V
CC
+ 0.3V
ESD Classication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5KV
Recommended Operating Conditions
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5V
±
5%
Ambient Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . 0
o
C to 70
o
C
Thermal Information
Thermal Resistance (Typical, Note 1) JA
(
o
C/W)
SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
87
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . .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: Stress 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 section of this specication is not implied.
NOTE:
1. JA
is measured with the component mounted on a low effective thermal conductivity test board in free air. (See Tech Brief TB379 for details.)
Electrical Specications
Operating Conditions: V
CC
= 5V, T
A
= 0
o
C to 70
o
C, Unless Otherwise Specied
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
INPUT SUPPLY POWER
Input Supply Current
R
T
= 100k -
10
15
mA
EN = 0V
4.25
8.8
4.5
mA
POR (Power-On Reset) Threshold
V
CC
Rising
4.25
4.38
4.5
V
V
CC
Falling
3.75
3.88
4.00
V
REFERENCE AND DAC
System Accuracy
Percent system deviation from programmed VID Codes
-1
-
1
%
DAC (VID0 - VID3) Input Low Voltage
DAC Programming Input Low Threshold Voltage
-
-
0.8
V
DAC (VID0 - VID3) Input High Voltage
DAC Programming Input High Threshold Voltage
2.0
-
-
V
VID Pull-Up
VIDx = 0V or VIDx = 3V
10
20
40
µ
A
CHANNEL GENERATOR
Frequency, F
SW
R
T
= 100k ,
±
1%
224
280
336
kHz
Adjustment Range
See Figure 10
0.05
-
1.5
MHz
Disable Voltage
Maximum voltage at FS/DIS to disable controller. I
FS/DIS
= 1mA.
-
1.2
1.0
V
ERROR AMPLIFIER
DC Gain
R
L
= 10K to ground
-
72
-
dB
Gain-Bandwidth Product
C
L
= 100pF, R
L
= 10K to ground
-
18
-
MHz
Slew Rate
C
L
= 100pF, R
L
= 10K to ground
-
5.3
-
V/
µ
s
Maximum Output Voltage
R
L
= 10K to ground
3.6
4.1
-
V
Minimum Output Voltage
R
L
= 10K to ground
-
0.16
0.5
V
I
SEN
Full Scale Input Current
-
50
-
µ
A
Over-Current Trip Level
-
82.5
-
µ
A
POWER GOOD MONITOR
Under-Voltage Threshold
VSEN Rising
-
0.92
-
V
DAC
Under-Voltage Threshold
VSEN Falling
-
0.90
-
V
DAC
PGOOD Low Output Voltage
I
PGOOD
= 4mA
-
0.18
0.4
V
PROTECTION
Over-Voltage Threshold
VSEN Rising
1.12
1.15
1.2
V
DAC
Percent Over-Voltage Hysteresis
VSEN Falling after Over-Voltage
-
2
-
%
HIP6301 7
Operation
Figure 1 shows a simplied diagram of the voltage regulation
and current control loops. Both voltage and current feedback
are used to precisely regulate voltage and tightly control
output currents, I
L1
and I
L2
, of the two power chan