HIP6301.PDF

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HIP6301
Data Sheet
March 2000
File Number
4765.1
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 configurations 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 Identification 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
Ordering Information
PART NUMBER
HIP6301CB
HIP6301CB-T
HIP6301EVAL1
TEMP. (
o
C)
0 to 70
PACKAGE
20 Ld SOIC
PKG. NO.
M20.3
20 Ld SOIC Tape and Reel
Evaluation Platform
Pinout
HIP6301 (SOIC)
TOP VIEW
VID4 1
VID3 2
VID2 3
VID1 4
VID0 5
COMP 6
FB 7
FS/DIS 8
GND 9
VSEN 10
20 V
CC
19 PGOOD
18 PWM4
17 ISEN4
16 ISEN1
15 PWM1
14 PWM2
13 ISEN2
12 ISEN3
11 PWM3
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Copyright
©
Intersil Corporation 2000
HIP6301
Block Diagram
PGOOD
V
CC
POWER-ON
RESET (POR)
VSEN
X 0.9
+
UV
THREE
STATE
OV
LATCH
S
+
OVP
X1.15
-
CLOCK AND
SAWTOOTH
GENERATOR
+
FS/EN
-
∑
-
+
+
PWM
PWM1
-
SOFT-
START
AND FAULT
LOGIC
∑
-
+
PWM
PWM2
-
COMP
+
∑
-
+
+
PWM
PWM3
VID0
VID1
VID2
VID3
VID4
D/A
+
E/A
-
-
∑
-
+
PWM
PWM4
-
FB
CURRENT
CORRECTION
PHASE
NUMBER
CHANNEL
DETECTOR
I_TOT
+
+
OC
-
I_TRIP
ISEN1
∑
+
+
+
ISEN2
ISEN3
ISEN4
GND
2
HIP6301
Simplified Power System Diagram
VSEN
PWM 1
SYNCHRONOUS
RECTIFIED BUCK
CHANNEL
PWM 2
SYNCHRONOUS
RECTIFIED BUCK
CHANNEL
MICROPROCESSOR
HIP6301
PWM 3
PWM 4
SYNCHRONOUS
RECTIFIED BUCK
CHANNEL
VID
SYNCHRONOUS
RECTIFIED BUCK
CHANNEL
Functional Pin Description
VID4 1
VID3 2
VID2 3
VID1 4
VID0 5
COMP 6
FB 7
FS/DIS 8
GND 9
VSEN 10
20 V
CC
19 PGOOD
18 PWM4
17 ISEN4
16 ISEN1
15 PWM1
14 PWM2
13 ISEN2
12 ISEN3
11 PWM3
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.
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.
ISEN1 (Pin 16), ISEN2 (Pin 13), ISEN3 (Pin 12) and
ISEN4 (Pin 17)
Current sense inputs from the individual converter channel’s
phase nodes. Unused sense lines MUST be left open.
COMP (Pin 6)
Output of the internal error amplifier. Connect this pin to the
external feedback and compensation network.
PGOOD (Pin 19)
Power good. This pin provides a logic-high signal when the
microprocessor CORE voltage (VSEN pin) is within specified
limits and Soft-Start has timed out.
FB (Pin 7)
Inverting input of the internal error amplifier.
FS/DIS (Pin 8)
Channel frequency, F
SW
, select and disable. A resistor from
this pin to ground sets the switching frequency of the
V
CC
(Pin 20)
Bias supply. Connect this pin to a 5V supply.
3
HIP6301
Typical Application - 2 Phase Converter Using HIP6601 Gate Drivers
+12V
V
IN
= +5V
BOOT
PVCC
UGATE
+5V
VCC
PHASE
PWM
FB
VSEN
COMP
V
CC
DRIVER
HIP6601
LGATE
GND
+V
CORE
PWM4
PGOOD
VID4
VID3
VID2
VID1
VID0
ISEN4
FS/DIS
ISEN3
ISEN2
GND
ISEN1
NC
NC
PWM3
PWM2
BOOT
PWM1
PVCC
UGATE
+12V
V
IN
= +5V
MAIN
CONTROL
HIP6301
PHASE
VCC
PWM
DRIVER
HIP6601
LGATE
GND
4
HIP6301
Typical Application - 4 Phase Converter Using HIP6602 Gate Drivers
+12V
BOOT1
V
IN
= +12V
UGATE1
V
CC
PHASE1
L
01
+5V
LGATE1
DUAL
DRIVER
HIP6602
FB
VSEN
COMP
V
CC
PVCC
+5V
V
IN
+12V
BOOT2
UGATE2
ISEN1
PGOOD
VID4
VID3
VID2
VID1
VID0
ISEN3
FS/DIS
PWM3
PWM4
GND
ISEN4
UGATE3
V
CC
PHASE3
+12V
BOOT3
V
IN
+12V
PWM1
PWM2
ISEN2
PWM1
PWM2
LGATE2
PHASE2
L
02
MAIN
CONTROL
HIP6301
GND
+V
CORE
L
03
LGATE3
DUAL
DRIVER
HIP6602
PVCC
+5V
V
IN
+12V
BOOT4
UGATE4
PWM3
PWM4
LGATE4
PHASE4
L
04
GND
5

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