US1260
DUAL 6A AND 1A LOW DROPOUT
POSITIVE ADJUSTABLE REGULATOR
FEATURES
Guaranteed <1.3V Dropout at 6A (output #2)
Guaranteed <0.6V Dropout at 1A (output #1)
Fast Transient Response
1% Voltage Reference Initial Accuracy
Built in Thermal Shutdown
DESCRIPTION
The US1260 product using a
proprietary process
com-
bines a dual low drop out adjustable output regulators in
a
single package
with one output having a minimum of
6A
and the other one having a
1A
output current capabil-
ity. This product is specifically designed to provide well
regulated supplies for low voltage ICs such as
3.3V to
1.5V and 2.5V supplies for the GTL+ termination
and the new clock for Pentium II
applications.Other
applications include
low cost dual supply for proces-
sors such as Intel P55C
™
where 2.8V and 3.3 V are
needed for the Core and the I/O supplies from the
5V input.
APPLICATIONS
Providing a single package solution for GTL+
and High Speed Bus Termination
Dual supply P55C
™
applications
TYPICAL APPLICATION
3.3V
C1
R1
C2
Vout1
2.5V / 1A
U1
Vin
Vout2
US1260
Gnd
Vfb2
Vfb1
Vctrl
7
6
5
4
3
2
1
R2
C4
R3
C3
R4
1.5V / 6A
R5
C5
1260app7-1.0
5V
Typical application of US1260 in the Pentium
ΙΙ™
design with the 1.5V output providing for GTL+ termination
while 2.5V supplies the clock chip.
Notes: Pentium
ΙΙ
is trade mark of Intel Corp.
Notes: P55C is trade mark of Intel Corp.
PACKAGE ORDER INFORMATION
Tj (
°
C)
0 TO 150
7 PIN PLASTIC
TO220(T)
US1260CT
7 PIN PLASTIC
TO263(M)
US1260CM
7 PIN PLASTIC
POWER FLEX(P)
US1260CP
Rev. 1.9
3/22/99
3-1
UNISEM [ UNISEM ]
