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PDF ( 数据手册 , 数据表 ) US1260CT

零件编号 US1260CT
描述 DUAL 6A AND 1A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
制造商 UNISEM
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US1260CT 数据手册, 描述, 功能
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
APPLICATIONS
Providing a single package solution for GTL+
and High Speed Bus Termination
Dual supply P55Capplications
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 P55Cwhere 2.8V and 3.3 V are
needed for the Core and the I/O supplies from the
5V input.
TYPICAL APPLICATION
1260app7-1.0
3.3V
C1
U1
US1260
Vout1 7
Vin 6
Vout2 5
Gnd 4
Vfb2 3
Vfb1 2
Vctrl 1
5V
C4
R5
C5
R1
R2
R3
R4
2.5V / 1A
C2
1.5V / 6A
C3
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







US1260CT pdf, 数据表
US1260
TYPICAL APPLICATION
RAMBUS APPLICATION
1260app6-1.0
5V
C1
U1
US1260
Vout1 7
Vin 6
Vout2 5
Gnd 4
Vfb2 3
Vfb1 2
Vctrl 1
2.5V
R1
C2
R2
3.3V
R3
C3
R4
Figure 5- Typical application of US1260 in the Rambusdesign with the 2.5V output providing for memory
termination while 3.3V supplies the on board logic.
Notes:Rambus is trade mark of Rambus Corp.
Ref Desig
U1
C1,C2,C3
R1
R2,R4
R3
HS1
Description
Qty Part #
Manuf
Dual LDO Regulator 1 US1260CM
Unisem
Capacitor
3 Elect,220uF,6.3V,ECAOJFQ221 Panasonic
Resistor
1 11 k, 1%, SMT , 0805
Panasonic
Resistor
2 10.2 k, 1%, SMT , 0805
Panasonic
Resistor
1 17.8 k, 1%, SMT , 0805
Panasonic
Heat Sink
1" Square Copper Pad area if Iout2<1.2A & Iout1<0.5A
For Iout2<3A & Iout1<0.5A Use Thermalloy 6030B
3-8
Rev. 1.9
3/22/99














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