US1260CM ETC-unknow, US1260CM Datasheet

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US1260CM

Manufacturer Part Number
US1260CM
Description
Manufacturer
ETC-unknow
Datasheet

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FEATURES
APPLICATIONS
TYPICAL APPLICATION
Notes: P55C is trade mark of Intel Corp.
Rev. 1.9
3/22/99
FEATURES
APPLICATIONS
TYPICAL APPLICATION
PACKAGE ORDER INFORMATION
PACKAGE ORDER INFORMATION
Typical application of US1260 in the Pentium
Notes: Pentium
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
Providing a single package solution for GTL+
and High Speed Bus Termination
Dual supply P55C
1260app7-1.0
0 TO 150
Tj (
°
is trade mark of Intel Corp.
C)
US1260
applications
3.3V
U1
5V
7 PIN PLASTIC
US1260CT
TO220(T)
Vout1
Vout2
Vfb2
Vfb1
Vctrl
Gnd
while 2.5V supplies the clock chip.
Vin
C1
7
6
5
4
3
2
1
POSITIVE ADJUSTABLE REGULATOR
design with the 1.5V output providing for GTL+ termination
DUAL 6A AND 1A LOW DROPOUT
R5
7 PIN PLASTIC
DESCRIPTION
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
needed for the Core and the I/O supplies from the
5V input.
C4
US1260CM
TO263(M)
C5
R1
R2
R3
R4
POWER FLEX(P)
7 PIN PLASTIC
US1260CP
where 2.8V and 3.3 V are
C2
C3
2.5V / 1A
1.5V / 6A
US1260
3-1

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US1260CM Summary of contents

Page 1

... Vout2 C4 4 Gnd 3 Vfb2 2 Vfb1 R5 1 Vctrl C5 design with the 1.5V output providing for GTL+ termination while 2.5V supplies the clock chip. 7 PIN PLASTIC 7 PIN PLASTIC TO220(T) TO263(M) US1260CT US1260CM US1260 where 2.8V and 3.3 V are 2. 1. PIN PLASTIC POWER FLEX(P) US1260CP 3-1 ...

Page 2

US1260 ABSOLUTE MAXIMUM RATINGS ABSOLUTE MAXIMUM RATINGS Input Voltage (Vin) ............................................................. Power Dissipation ............................................ Storage Temperature Range ................................ Operating Junction Temperature Range ...................... 150 C PACKAGE INFORMATION PACKAGE INFORMATION 7 PIN PLASTIC TO220 FRONT VIEW 7 Vout1 ...

Page 3

PIN DESCRIPTIONS PIN DESCRIPTIONS PIN # PIN SYMBOL PIN DESCRIPTION 3 Vfb2 A resistor divider from this pin to the Vout #2 pin and ground sets the output 2 Vfb1 A resistor divider from this pin to Vout #1 pin ...

Page 4

US1260 APPLICATION INFORMATION APPLICATION INFORMATION Introduction The US1260 is a dual adjustable Low Dropout (LDO) regulator packaged pin TO220 which can easily be programmed with the addition of two external resis- tors to any voltages within the ...

Page 5

Stability The US1260 requires the use of an output capacitor as part of the frequency compensation in order to make the regulator stable. Typical designs for the microproces- sor applications use standard electrolytic capacitors with typical ESR in the range ...

Page 6

US1260 : Example # 2 Assuming the following specifications : V 3. 1.5 V OUT 2.5 V OUT 1 I 1.5A OUT 2 MAX I = 0.2 A OUT 1 MAX ...

Page 7

... Vout2 C4 4 Gnd 3 Vfb2 2 Vfb1 R5 1 Vctrl C5 design with the 1.5V output providing for GTL+ termination while 2.5V supplies the clock chip. Qty Part # 1 US1260CM 2 Elect,680uF,EEUFA1A681L 1 Elect,220uF,6.3V,ECAOJFQ221 1 Ceramic, 0.1 uF, SMT , 0805 1 Elect,100uF,6.3V,ECAOJFQ101 1%, SMT , 0805 2 10 1%, SMT , 0805 1 2. 1%, SMT , 0805 ...

Page 8

... Heat Sink 3 Vout1 6 Vin 5 Vout2 4 Gnd 3 Vfb2 2 Vfb1 1 Vctrl Qty Part # 1 US1260CM 3 Elect,220uF,6.3V,ECAOJFQ221 1%, SMT , 0805 2 10 1%, SMT , 0805 1 17 1%, SMT , 0805 1" Square Copper Pad area if Iout2<1.2A & Iout1<0.5A For Iout2<3A & Iout1<0.5A Use Thermalloy 6030B 2. 3. ...

Page 9

... Resistor R5 Resistor Rev. 1.9 3/22/99 3. Vout1 U1 6 Vin 5 Vout2 4 Gnd C4 3 Vfb2 2 Vfb1 R5 1 Vctrl 5V Qty Part # 1 US1260CM 2 Elect,680uF,EEUFA1A681L 1 Ceramic, 0.1 uF, SMT , 0805 1 Elect,100uF,6.3V,ECAOJFQ101 1 10 1%, SMT , 0805 1 12 1%, SMT , 0805 5%, SMT , 0805 US1260 2. Manuf Unisem Panasonic Panasonic Panasonic Panasonic ...

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