IRU3004CW International Rectifier, IRU3004CW Datasheet

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IRU3004CW

Manufacturer Part Number
IRU3004CW
Description
IC CTRL/REG SYNC BUCK 20-SOIC
Manufacturer
International Rectifier
Datasheet

Specifications of IRU3004CW

Applications
Controller, Intel Pentium® III
Voltage - Input
5V, 12V
Number Of Outputs
3
Voltage - Output
1.3 ~ 3.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
20-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
*IRU3004CW
IRU3004-CW
IRU3004-CW

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Part Number
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Quantity
Price
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IRU3004CW
Manufacturer:
IOR
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IRU3004CW
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IR
Quantity:
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Part Number:
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FEATURES
APPLICATIONS
TYPICAL APPLICATION
PACKAGE ORDER INFORMATION
Rev. 1.7
07/16/02
Meets latest VRM 8.4 specification for PentiumIII
Provides single chip solution for Vcore, GTL+ and
clock supply
On-Board DAC programs the output voltage from
1.3V to 3.5V. The IRU3004 remains on for VID code
of (11111)
Dual linear regulator controller on-board for 1.5V
GTL+ and 2.5V clock supplies
Loss-less Short Circuit Protection
Synchronous operation allows maximum efficiency
Patented architecture allows fixed frequency opera-
tion as well as 100% duty cycle during dynamic
load
Minimum Part Count, No External Compensation
Soft-Start Function
High current totem pole driver for direct driving of the
external power MOSFET
Power Good Function
Pentium III & next generation processor DC to DC
converter application
Low Cost Pentium with AGP
VID4
VID3
VID2
VID1
VID0
C1
3.3V
12V
5V
C13
C2
R18
L1
C3
C4
Ct
SS
V12
CONTROLLER IC WITH DUAL LDO CONTROLLER
D4
T
0 To 70
0 To 70
C5
A
5-BIT PROGRAMMABLE SYNCHRONOUS BUCK
(8C)
V5
D3
Figure 1 - Typical application of the IRU3004.
C6
CS+
D2
R1
R2
IRU3004CF
IRU3004CW
HDrv
IRU3004
Q1
D1
DEVICE
CS-
D0
www.irf.com
R3
LDrv
V
FB2
PGd
Gnd
DESCRIPTION
The IRU3004 controller IC is specifically designed to meet
Intel specifications for Pentium III
applications as well as the next generation P6 family
processors. The IC provides a single chip controller IC
for the Vcore, GTL+ and clock supplies required for the
Pentium III applications. The IRU3004 features a pat-
ented topology, that in combination with a few external
components as shown in the typical application circuit,
will provide in excess of 20A of output current for an on-
board DC-DC converter while automatically providing the
right output voltage via the 5-bit internal DAC meeting
the latest VRM specification. The IRU3004 also features
loss-less current sensing by using the R
side power MOSFET as the sensing resistor and a Power
Good window comparator that switches its open collec-
tor output low when the output is outside of a
window. Other features of the device are: under-voltage
lockout for both 5V and 12V supplies, an external pro-
grammable soft-start function as well as programming
the oscillator frequency by using an external capacitor.
C8
Q2
R5
20-Pin Plastic TSSOP (F)
20-Pin Plastic SOIC (W)
3.3V
V
Lin2
R4
FB3
V
Lin1
C7
FB1
Power Good
R16
PACKAGE
L2
R12
R9
R11
C9
R17
C16
R13
Q3
Q4
C15
C14
Note: Pentium III is trademark of Intel Corp.
C10
V
R14
R15
R8
OUT
R7
Data Sheet No. PD94140
3
C11
C12
V
V
OUT
OUT
IRU3004
1
2
microprocessor
DS(on)
of the high
10%
1

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IRU3004CW Summary of contents

Page 1

... R11 Lin1 IRU3004 V FB1 PGd Lin2 FB2 C9 3. Power Good DEVICE PACKAGE IRU3004CW 20-Pin Plastic SOIC (W) IRU3004CF 20-Pin Plastic TSSOP (F) www.irf.com Data Sheet No. PD94140 IRU3004 microprocessor of the high DS(on) 10% Note: Pentium III is trademark of Intel Corp OUT C10 V 1 OUT C11 R7 R8 ...

Page 2

IRU3004 ABSOLUTE MAXIMUM RATINGS V5 Supply Voltage .................................................... 10V V12 Supply Voltage .................................................. 20V Storage Temperature Range ...................................... -65°C To 150°C Operating Junction Temperature Range ..................... PACKAGE INFORMATION 20-PIN WIDE BODY PLASTIC SOIC (W) TOP VIEW ...

Page 3

PARAMETER SYM UVLO Section UVLO Threshold-12V UVLO Hysteresis-12V UVLO Threshold-5V UVLO Hysteresis-5V Error Comparator Section Input Bias Current Input Offset Voltage Delay to Output Current Limit Section CS Threshold Set Current CS Comp Offset Voltage Hiccup Duty Cycle Supply Current ...

Page 4

IRU3004 PIN DESCRIPTIONS PIN# PIN SYMBOL PIN DESCRIPTION 1 Ct This pin programs the oscillator frequency in the range of 50KHz to 500KHz with an external capacitor connected from this pin to the ground. 2 Lin1 This pin controls the ...

Page 5

BLOCK DIAGRAM Enable V12 12 UVLO V5 5 Vset D0 19 Enable D1 5Bit 18 DAC Ctrl Logic FB2 Lin2 20 Lin1 2 V FB1 3 Figure 2 - Simplified block diagram ...

Page 6

IRU3004 TYPICAL APPLICATION Pentium III C13 12V R18 V12 V5 CS VID4 VID3 VID2 ...

Page 7

IRU3004 APPLICATION PARTS LIST Ref Desig Description Q1 MOSFET Q2 MOSFET Q3 Bipolar Trans MOSFET L1 Inductor L2 Inductor C1 Capacitor, Ceramic C2, 6 Capacitor, Ceramic C3 Capacitor, Electrolytic 2 C4 Capacitor, Ceramic C5 Capacitor, Ceramic C7, 14, ...

Page 8

IRU3004 TYPICAL APPLICATION Pentium with AGP C13 C3 3. 12V R18 V12 V5 CS VID4 VID3 VID2 VID1 VID0 Figure 4 - Typical application of IRU3004 in ...

Page 9

IRU3004 APPLICATION PARTS LIST Ref Desig Description Q1 MOSFET Q2 MOSFET Q3, 4 MOSFET L1 Inductor L2 Inductor C1 Capacitor, Ceramic C2, 6 Capacitor, Ceramic C3 Capacitor, Electrolytic C4 Capacitor, Ceramic C5 Capacitor, Ceramic C7, 14, 15 Capacitor, Ceramic C8 ...

Page 10

IRU3004 APPLICATION INFORMATION An example of how to calculate the components for the application circuit is given below. Assuming, two sets of output conditions that this regu- lator must meet: a) Vo=2.8V, Io=14.2A, DVo=185mV, DIo=14.2A b) Vo=2V, Io=14.2A, DVo=140mV, DIo=14.2A ...

Page 11

Output Inductor Selection The output inductance must be selected such that un- der low line and the maximum output voltage condition, the inductor current slope times the output capacitor ESR is ramping up faster than the capacitor voltage is drooping ...

Page 12

IRU3004 With the maximum heat sink temperature calculated in the previous step, the heat-sink-to-air thermal resistance ( calculated as follows: SA Assuming T = 358C 118 - 35 = 838C A ...

Page 13

With the maximum heat sink temperature calculated in the previous step, the heat-sink-to-air thermal resistance ( calculated as follows: SA Assuming T = 358C 118 - 35 = 838C A Temperature ...

Page 14

IRU3004 Input Filter It is recommended to place an inductor between the system 5V supply and the input capacitors of the switch- ing regulator to isolate the 5V supply from the switching noise that occurs during the turn on and ...

Page 15

A 1.0 DIA NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. Rev. 1.7 07/16/02 (F) TSSOP Package 20-Pin 20-PIN SYMBOL DESIG MIN NOM ...

Page 16

IRU3004 20-Pin Surface Mount, Wide Body PIN NO. 1 NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. 16 (W) SOIC Package C E DETAIL 0.51 0.020 SYMBOL 20-PIN MIN MAX ...

Page 17

PACKAGE SHIPMENT METHOD PKG PACKAGE DESIG DESCRIPTION F TSSOP Plastic W SOIC, Wide Body 1 1 Feed Direction Figure A IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105 Rev. 1.7 07/16/02 PIN PARTS COUNT ...

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