iru1050 International Rectifier Corp., iru1050 Datasheet

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iru1050

Manufacturer Part Number
iru1050
Description
5a Low Dropout Positive Adjustable Regulator -
Manufacturer
International Rectifier Corp.
Datasheet

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FEATURES
APPLICATIONS
TYPICAL APPLICATION
Notes: Pentium P54C, P55C, Klamath, Pentium Pro,VRE are trademarks of Intel Corp. Cyrix M2 is trademark of Cyrix Corp.
Power PC is trademark of IBM Corp.
PACKAGE ORDER INFORMATION
Rev. 1.8
08/20/02
Guaranteed < 1.3V Dropout at Full Load Current
Fast Transient Response
1% Voltage Reference Initial Accuracy
Output Current Limiting
Built-In Thermal Shutdown
Low Voltage Processor Applications such as:
P54C , P55C , Cyrix M2 ,
POWER PC , AMD
GTL+ Termination
PENTIUM PRO , KLAMATH
Low Voltage Memory Termination Applications
Standard 3.3V Chip Set and Logic Applications
0 To 150
T
J
(°C)
Figure 1 - Typical Application of IRU1050 in a 5V to 3.38V regulator designed
2-PIN PLASTIC
TO-252 (D-Pak)
IRU1050CD
IRU1050
5V
to meet the Intel P54C
3-PIN PLASTIC
IRU1050CM
TO-263 (M)
V
OUT
1500uF
V
Adj
www.irf.com
IN
C1
3
2
1
DESCRIPTION
The IRU1050 is a low dropout three-terminal adjustable
regulator with minimum of 5A output current capability.
This product is specifically designed to provide well regu-
lated supply for low voltage IC applications such as
Pentium
for Pentium Pro
The IRU1050 is also well suited for other processors
such as Cyrix , AMD and Power PC
The IRU1050 is guaranteed to have <1.3V dropout at full
load current making it ideal to provide well regulated
outputs of 2.5V to 3.3V with 4.75V to 7V input supply.
5A LOW DROPOUT POSITIVE
processors.
Ultra Thin-Pak
2-PIN PLASTIC
ADJUSTABLE REGULATOR
IRU1050CP
P54C ,P55C
R1
121
R2
205
and Klamath
TM
(P)
as well as GTL+ termination
Data Sheet No. PD94126
C2
2x 1500uF
3-PIN PLASTIC
processor applications.
TO-220 (T)
IRU1050CT
3.38V / 5A
IRU1050
applications.
1

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iru1050 Summary of contents

Page 1

... Standard 3.3V Chip Set and Logic Applications TYPICAL APPLICATION IRU1050 Figure 1 - Typical Application of IRU1050 3.38V regulator designed Notes: Pentium P54C, P55C, Klamath, Pentium Pro,VRE are trademarks of Intel Corp. Cyrix M2 is trademark of Cyrix Corp. Power PC is trademark of IBM Corp. PACKAGE ORDER INFORMATION T (° ...

Page 2

... IRU1050 ABSOLUTE MAXIMUM RATINGS Input Voltage (V ) .................................................... 7V IN Power Dissipation ..................................................... Internally Limited Storage Temperature Range ...................................... Operating Junction Temperature Range ..................... PACKAGE INFORMATION 2-Pin Plastic TO-252 (D-Pak) 3-Pin Plastic TO-263 (M) FRONT VIEW FRONT VIEW Tab is Tab is V OUT V OUT 1 Adj =70 C/W for 0.5" Sq pad =35 C/W for 1" ...

Page 3

... IN + CURRENT LIMIT THERMAL SHUTDOWN Figure 2 - Simplified block diagram of the IRU1050. APPLICATION INFORMATION Introduction The IRU1050 adjustable Low Dropout (LDO) regulator is a three-terminal device which can easily be programmed with the addition of two external resistors to any volt- ages within the range of 1.25 to 5.5 V. This regulator ...

Page 4

... Figure 4 - Schematic showing connection for best load regulation. Stability The IRU1050 requires the use of an output capacitor as part of the frequency compensation in order to make the regulator stable. Typical designs for microprocessor ap- plications use standard electrolytic capacitors with a 3R2 which typical ESR in the range 100mV and an output ADJ capacitance of 500 to 1000mF ...

Page 5

... AAVID.................PH# (603) 528 3400 Thermalloy...........PH# (214) 243-4321 Designing for Microprocessor Applications As it was mentioned before, the IRU1050 is designed specifically to provide power for the new generation of the low voltage processors requiring voltages in the range of 2.5V to 3.6V generated by stepping down the 5V sup- ply ...

Page 6

... Select R2=218V, 0.1% Selecting both R1 and R2 resistors to be 0.1% toler- ance, results in the least amount of error introduced by the resistor dividers leaving Max Allowed for the IRU1050 reference which is within the initial Output Tolerance accuracy of the device. 100 mV Finally, the input capacitor is selected as follows: ...

Page 7

... V C2 prevent any high frequency oscillation that may result 5x 1500uF due to excessive trace inductance. R1 121 0.1% R2 218 0.1% Visit us at www.irf.com for sales contact information Data and specifications subject to change without notice. 02/01 www.irf.com IRU1050 pin to the output capacitors to OUT TAC Fax: (310) 252-7903 7 ...

Page 8

... IRU1050 (D) TO-252 Package 2-Pin 458 NOTE: ALL MEASUREMENTS www.irf.com SYMBOL MIN MAX A 6.477 6.731 B 5.004 5.207 C 0.686 0.838 D 7.417 8.179 E 9.703 10.084 F 0.635 0.889 2.286 BSC G H 4.521 4.623 J &1.52 & ...

Page 9

... Rev. 1.8 08/20/02 (M) TO-263 Package 3-Pin SYMBOL MIN MAX A 10.05 10.312 B 8.28 8.763 C 4.31 4.572 D 0.66 0.91 E 1.14 1.40 2.54 REF G H 14.73 15.75 K 1.40 1.68 L 0.00 0.254 M 2.49 2.74 N 0.33 0.58 P 2.286 2.794 2.41 2.67 U 6.50 REF V 7.75 REF NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. www.irf.com IRU1050 ...

Page 10

... IRU1050 (P) Ultra Thin-Pak 2-Pin SYMBOL MIN MAX A 5.91 6.17 A1 5.54 5.79 B 6.02 6.27 C 1.70 2.03 D 0.63 0.79 E 0.17 0.33 G 2.16 2.41 G1 4.45 4.70 H 9.42 9.68 K 0.76 1.27 L 0.02 0.13 M 0.89 1.14 N 0.25 0.25 P 0.94 1. 2.92 3.30 V 5.08 NOM NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. www.irf.com U V Rev. 1.8 08/20/02 ...

Page 11

... Rev. 1.8 08/20/02 (T) TO-220 Package 3-Pin E-PIN a (5x) D SYMBOL MIN MAX A 4.06 4. 7.58 b 0.63 1.02 b1 1.14 1.52 C1 0.38 0.56 CP 3.71D 3.96D D 14.22 15.062 E 9.78 10.54 e 2.29 2.79 e1 4.83 5.33 e3 1.14 1.40 F 1.14 1.40 H1 5.94 6.55 J1 2.29 2.92 L 13.716 14.22 Q 2.62 2.87 R 5.588 6.17 NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. www.irf.com IRU1050 ...

Page 12

... IRU1050 PACKAGE SHIPMENT METHOD PKG PACKAGE DESIG DESCRIPTION D TO-252, (D-Pak) M TO-263 P Ultra Thin-Pak TM T TO-220 1 1 Feed Direction Figure A IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105 12 PIN PARTS COUNT PER TUBE ...

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