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IRU1261CMIRN/a2462avaiDual 1A and 6A Fixed LDO Linear Regulator in a TO-263 5-Leads package
IRU1261CPTRIRN/a10000avaiDual 1A and 6A Fixed LDO Linear Regulator in a ULTRA THIN-PAK 5-Leads package


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IRU1261CM-IRU1261CPTR
Dual 1A and 6A Fixed LDO Linear Regulator in a TO-263 5-Leads package
. Data Sheet No. PD94139
International IRU1261
TOR Rectifier
DUAL 6A AND IA LOW DROPOUT
POSITIVE FIXED 1.5V AND 2.5V REGULATOR
FEATURES DESCRIPTION
El Guaranteed to Provide 1.5V and 2.5V Supplies The IRU1261, using a proprietary process, combines a
with 3.1V Input dual low dropout regulator with fixed outputs of 1 .5V and
El Fast Transient Response 2.5V in a single package with the 1.5V output having a
El 1% Voltage Reference Initial Accuracy minimum of 6A and the 2.5V having a IA output current
El Built-ln Thermal Shutdown capability. This product is specifically designed to pro-
vide well regulated supplies from 3.3V to generate 1.5V
APPLICATIONS for GTL+ termination resistor supply and 2.5V clock
a Pentium Hm Processor Applications supply for the new generation of the Pentium IITM pro-
cessor applications.
I YPICAL APPLICATION
3-3v)h-tr-
2.5V/ IA
A ISLI
IRU1261 Gm
1.5V/6A
He- [He-
Figure 1 - Typical application of IRU1261 in a Pentium IITM processor application.
Note: Pentium IITM is trademark of Intel Corp.
PACKAGE ORDER INFORMATION
To (°C) 5-PIN PLASTIC 5-PIN PLASTIC
TO-263 (M) Ultra Thin-PakTM (P)
0 To 150 IRU1261CM IRU1261CP
Rev. 2.0 1
09I19I02
IRU1261
International
TOR Rectifier
ABSOLUTE MAXIMUM RATINGS
Input Voltage (V m) .................................................... 7V
Power Dissipation P....................................................
Storage Temperature Range ......................................
Operating Junction Temperature Range .....................
0°C To 150°C
Internally Limited
-65°C To 150°C
PACKAGE INFORMATION
5-PIN PLASTIC TO-263 (M)
5-PIN ULTRA THlN-PAKTM (P)
VCXJT1
9JA=30°CIW for 1"sq pad
:lvoun
:lvourz
:IVCTRL
6JA=30°CNV for 1"sq pad
dmwzzm
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over Gn=1pLF, COUT=100}LF and T=0 to 150°C. Typical
values refer to TJ=25°C. |FL=6A for output #2 and IA for output #1. VCTRL=5V, Vm=3.3V.
PARAMETER SYM TEST CONDITION MIN TYP MAX UNITS
VCTRL Input Voltage 3.0 V
Output Voltage #2 V02 lo=10mA, TJ=25°C 1.485 1.500 1.515 V
lo=10mA 1.470 1.500 1.530
Output Voltage #1 V01 lo=10mA, TJ=25°C 2.462 2.500 2.537 V
lo=10mA 2.425 2.500 2.575
Line Regulation lo=10mA, 3.1VLoad Regulation (Note 1) 10mADropout Voltage (Output #2) Note 2, Io=6A, VCTRL=4.75V 1.3 V
Dropout Voltage (Output #1) Note 2, lo=1A, VCTRL=4.75V 0.4 0.6 V
Current Limit (Output #2) AVo=100mV A
Current Limit (Output #1) AVo=100mV A
Minimum Load Current Note 3 5 10 mA
Thermal Regulation 30ms Pulse, lto=IFL 0.01 0.02 %/W
Ripple Rejection f=120Hz, Co=25wF Tantalum,
lo=0.5 X IFL 70 dB
Temperature Stability lo=10mA 0.5 %
Long Term Stability TJ=125°C, 1000Hrs 0.3 %
RMS Output Noise 1OHzNote 1: Low duty cycle pulse testing with Kelvin con-
nections is required in order to maintain accurate data.
Note 2: Dropout voltage is dehned as the minimum dif-
ferential voltage between VIN and Vow required to main-
tain regulation at Vow. It is measured when the output
voltage drops 1% below its nominal value.
Note 3: Minimum load current is defined as the mini-
mum current required at the output in order for the out-
put voltage to maintain regulation. Typically the resistor
dividers are selected such that it automatically main-
tains this current.
2
Rev. 2.0
09/19/02
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