LT1580C View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LT1580C' PDF : 16 Pages View PDF
LT1580/LT1580 -2.5
TYPICAL APPLICATION
Dual Regulators Power Pentium Processor or Upgrade CPU
R12
0.0075Ω*
5V
12V
+ C1
VIN VOUT
R1
10k
+
C8
0.1µF
220µF
10V
D1
1N4148
R2
470Ω
LT1587
ADJ
LT1006
–
C6
R10
0.01µF
10k
D2
1N4148
R4
178Ω
1%
R13
0.005Ω*
12V C11 +
22µF
35V
4
1
VCONTROL SENSE
LT1580
5 VPOWER VOUT 3
R14, 2Ω
C10
1µF
+ C9 + C2
ADJ
220µF
10V
220µF
10V
C5
0.33µF
2
R7
107Ω
0.25%
R8
107Ω
0.35%
5V
R5
R6
Q1
10k
89.8Ω
ZVN4206
0.5%
Q2
2N3904
*RESISTORS ARE IMPLEMENTED AS COPPER TRACES ON PCB
IF 1 OZ COPPER, TRACE WIDTHS ARE 0.05 INCH
IF 2 OZ COPPER, TRACE WIDTHS ARE 0.025 INCH
R13 IS 0.83 INCHES LONG, R12 IS 1.24 INCHES LONG
E3 CPU TYPE
0 P55C
1 P54C
R3
110Ω
1%
I/O
+ C3
SUPPLY
3.5V/3.3V
220µF
10V
C4
0.33µF
5V
R11
10k
+ C7
330µF
6.3V
Q3
2N7002
R9
10k
CORE
SUPPLY
3.5V/2.5V
Q3
2N7002
E3
TO CPU
VOLTAGE
SELECT PIN
1580 TA04
RELATED PARTS
PART NUMBER
LTC®1266
LTC1267
LTC1430
LT1584
LT1585
LT1587
DESCRIPTION
Synchronous Switching Controller
Dual High Efficiency Synchronous Switching Regulator
High Power Synchronous Step-Down Switching Regulator
7A Low Dropout Fast Transient Response Regulator
4.6A Low Dropout Fast Transient Response Regulator
3A Low Dropout Fast Transient Response Regulator
COMMENTS
>90% Efficient High Current Microprocessor Supply
>90% Efficiency with Fixed 5V, 3.3V or Adjustable Outputs
>90% Efficient High Current Microprocessor Supply
For High Performance Microprocessors
For High Performance Microprocessors
For High Performance Microprocessors
16 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408)432-1900 q FAX:(408)434-0507 q www.linear-tech.com
158025fas, sn158025 LT/GP 0598 2K REV A • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1995
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