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LT1270A-Rev_B View Datasheet(PDF) - Linear Technology

Part NameLT1270A(Rev_B) Linear
Linear Technology Linear
Description8A and 10A High Efficiency Switching Regulators
LT1270A Datasheet PDF : 4 Pages
1 2 3 4
LT1270A/LT1270
U
TYPICAL APPLICATIO S
Boost Converter (5V to 12V)
5V
55µH*
VIN
VSW
LT1270
FB
GND
VC
1k
1µF
MBR1020
12V, 2A
10.7k
1.24k
1000µF
25V
PULSE ENGINEERING #PE-92116
LT1270 • TA05
Negative-to-Positive Buck-Boost Converter
OPTIONAL
INPUT
FILTER
L3
VIN
–12V
C4
200µF*
L1
55µH**
VIN
VSW
LT1270
L2
OPTIONAL
C3
OUTPUT
FILTER
D1
VOUT
12V, 3A
C2
R1
2000µF 11.3k
FB
GND
VC
R3
2.2k
C1
0.22µF
1.24k
*REQUIRED IF INPUT LEADS 2"
**PULSE ENGINEERING #PE-92116
LT1270 • TA06
Negative Buck Converter
OPTIONAL
INPUT FILTER
L3
10µH
VIN
–20V
VIN
VSW
+ C3
100µF*
LT1270
FB
GND
VC
C1
R3
D1
L1
100µH**
R2
1.24k
LT1270 • TA07
C2
1000µF
R1
4.64k
LOAD
–5.2V, 7.5A
12k
OPTIONAL
OUTPUT
FILTER
L2
4µF
C4
200µF
*REQUIRED IF INPUT LEADS 2"
**PULSE ENGINEERING #PE-92115
U
PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted.
0.380 – 0.420
(9.652 – 10.668)
0.139 – 0.153
(3.531 – 3.886)
DIA
0.079 – 0.135
(2.007 – 3.429)
0.169 – 0.185
(4.293 – 4.699)
0.035 – 0.055
(0.889 – 1.397)
0.560 – 0.650
(14.224 – 16.510)
0.866 – 0.913
(21.996 – 23.190)
0.970 – 1.050
(24.64 – 26.67)
0.460 – 0.500
(11.68 – 12.70)
0.057 – 0.077
(1.448 – 1.956)
0.028 – 0.035
(0.711 – 0.889)
4
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
(408) 432-1900 q FAX: (408) 434-0507 q TELEX: 499-3977
0.015 – 0.025
(0.381 – 0.635)
0.210 – 0.240
(5.334 – 6.096)
0.327 – 0.335
(8.306 – 8.509)
0.620 ± 0.020
(15.75 ± 0.508)
0.700 – 0.728
(17.780 – 18.491)
0.055 – 0.090
(1.397 – 2.286)
0.079 – 0.115
(2.007 – 2.921)
0.170 – 0.185
(4.318 – 4.699)
T5 (FORMED) 0392
LT/GP 1292 5K REV B
© LINEAR TECHNOLOGY CORPORATION 1992
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