Data Sheet No. PD94139
IRU1261
DUAL 6A AND 1A LOW DROPOUT
POSITIVE FIXED 1.5V AND 2.5V REGULATOR
DESCRIPTION
The IRU1261, using a proprietary process, combines a
dual low dropout regulator with fixed outputs of 1.5V and
2.5V in a single package with the 1.5V output having a
minimum of 6A and the 2.5V having a 1A output current
capability. This product is specifically designed to pro-
vide well regulated supplies from 3.3V to generate 1.5V
for GTL+ termination resistor supply and 2.5V clock
supply for the new generation of the Pentium II proces-
sor applications.
FEATURES
Guaranteed to Provide 1.5V and 2.5V Supplies
with 3.1V Input
Fast Transient Response
1% Voltage Reference Initial Accuracy
Built-In Thermal Shutdown
APPLICATIONS
Pentium II Processor Applications
TYPICAL APPLICATION
3.3V
C1
Vout1
Vin
5
4
3
2
1
C4
C2
C3
2.5V / 1A
IRU1261
Gnd
Vout2
Vctrl
1.5V / 6A
1261app1-1.3
5V
R1
Figure 1 - Typical application of IRU1261 in a Pentium II processor application
PACKAGE ORDER INFORMATION
Tj (擄C)
0 To 150
5-PIN PLASTIC
TO-220 (T)
IRU1261CT
5-PIN PLASTIC
TO-263 (M)
IRU1261CM
5-PIN PLASTIC
Ultra Thin-Pak (P)
IRU1261CP
Rev. 1.8
07/03/01
1