LT1584/LT1585/LT1587
U
TYPICAL APPLICATIONS N
Guaranteed LT1584/LT1431 Circuit for the Intel 90MHz and 100MHz Pentium Processors
(Meets Intel Specifications with Worst-Case Tolerances)
THERMALLOY
7021B-MT
PLACE IN MICROPROCESSOR
SOCKET CAVITY
5V
SEE NOTE 5
3
2
V
IN
OUT
LT1584
OUT
NOTES: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTOR VALUES ARE OHMS,
1/8W, 5%
2. ALL CAPACITORS ARE 50V, 20%
3. ALL POLARIZED CAPACITORS ARE AVX
TYPE TPS OR EQUIVALENT
R4
SEE NOTE 6
C8 TO C13
100µF
C14 TO C23
1µF
C2 TO C4
220µF
10V
AVX TPS
3 EACH
+
+
R1
1k
10V
16V
ADJ
1
AVX TPS
6 EACH
AVX Y5V 0805
10 EACH
C6
0.01µF
R2
1k
SENSE
4. INPUT CAPACITANCE MAY BE REDUCED
IF THE 5V SUPPLY IS WELL BYPASSED
5. FOR 100MHz PENTIUM PROCESSOR,
INPUT VOLTAGE MUST BE AT LEAST
4.85V AT THE REGULATOR INPUT
6. FOR PENTIUM VRE PROCESSOR,
R4 NOT INSTALLED
– FOR 3.3V OUTPUT, INSTALL 0Ω JUMPER
RESISTOR R4
7. R3A TO R3E ARE B.I. TECHNOLOGY 627V100
R3D
83Ω
R3E
117Ω
SEE NOTE 7
5
6
C5
33pF
NPO
4
2
1
R3C
800Ω
COMP COL
+
+
C7
3
4
8
7
100µF
V
REF
3
2
1
10V
LT1431S
R3B
R
R
T
M
1.35k
SGND FGND
C1
0.1µF
5
6
R3A
1.15k
SGND
PGND
PGND
LT1584 • TA06
LT1584/LT1431 Transient Response
for 3.8A Load Current Step*
VOUT
50mV/DIV
*TRANSIENT RESPONSE
MEASURED WITH AN INTEL
POWER VALIDATOR.
VOUT IS MEASURED AT THE
POWER VALIDATOR
IOUT
2A/DIV
LT1584 • TA07
100µs/DIV
RELATED PARTS
PART NUMBER
LT1083/84/85
LT1083/84/85
LT1086
DESCRIPTION
COMMENTS
Fixed Output at 3.3V, 3.6V, 5V and 12V, V to 25V
7.5A, 5A, 3A Low Dropout Linear Regulators
7.5A, 5A, 3A Low Dropout Linear Regulators
1.5A Low Dropout Linear Regulator
IN
Adjustable Output with up to 30V (V – V ) Differential
IN
OUT
Both Fixed and Adjustable Versions, (V – V ) to 30V
IN
OUT
LT1521
300mA Low Dropout Linear Regulator with 12µA Quiescent
Current and Shutdown
Both Fixed and Adjustable Versions, Surface Mount
Package Available
LT1529
LT1580
3A Low Dropout Linear Regulator with 50µA Quiescent
Current and Shutdown
Both Fixed and Adjustable Versions, Surface Mount
Package Available
7A Very Low Dropout Linear Regulator
540mV Dropout at 7A, Remote Sensing
158457a
LT/TP 0404 1K REV A • PRINTED IN USA
16 LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
●
●
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
LINEAR TECHNOLOGY CORPORATION 1995
Linear [ Linear ]
