US1260 Datasheet, PDF (7/9 Pages) UNISEM – DUAL 6A AND 1A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR

US1260
TYPICAL APPLICATION
PENTIUM ΙΙ™ APPLICATION
3.3V
C1
R1
R2
Vout1 7
U1
Vin 6
Vout2 5
US1260 ^{Gnd 4}
C4
R3
Vfb2 3
R4
Vfb1 2
R5
Vctrl 1
C5
1260app7-1.0
5V
2.5V / 1A
C2
1.5V / 6A
C3
Figure 4 - 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.
Ref Desig
U1
C1,C3
C2
C4
C5
R1
R2,R4
R3
R5
HS1
Description
Qty Part #
Manuf
Dual LDO Regulator 1 US1260CM
Unisem
Capacitor
2 Elect,680uF,EEUFA1A681L
Panasonic
Capacitor
1 Elect,220uF,6.3V,ECAOJFQ221 Panasonic
Capacitor
1 Ceramic, 0.1 uF, SMT , 0805 Panasonic
Capacitor
1 Elect,100uF,6.3V,ECAOJFQ101 Panasonic
Resistor
1 11 kΩ , 1%, SMT , 0805
Panasonic
Resistor
2 10.2 kΩ , 1%, SMT , 0805
Panasonic
Resistor
1 2.55 kΩ , 1%, SMT , 0805
Panasonic
Resistor
1 3 Ω , 5%, SMT , 0805
Panasonic
Heat Sink Use 1" Square Copper Pad area if Iout2<1.7A & Iout1<0.2A
For Iout2<3A & Iout1<0.5A Use US1260CT and Thermalloy
6030B
Rev. 1.9
3/22/99
3-7