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LTC1149 Datasheet(PDF) 16 Page - Linear Technology

Part # LTC1149
Description  High Efficiency Synchronous Step-Down Switching Regulators
PDF  20 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1149 Datasheet(HTML) 16 Page - Linear Technology

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LTC1149
LTC1149-3.3/LTC1149-5
TYPICAL APPLICATIO S
Figure 10. High Efficiency 8V to 20V Input 3.3V/1A Output Regulator
PGATE
VIN
VCC
P-DRIVE
VCC
CT
ITH
SENSE–
CAP
SHDN2
R-GND
NGATE
PGND
SGND
SHDN1
SENSE+
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
LTC1149-3.3
0.068
µF
0.047
µF
1N4148
1N4148
3300pF
1k
390pF
1
µF
1000pF
IRFR024
1N5818
100
µF
35V
VIN
8V TO 20V
L*
68
µH
RSENSE**
0.1
Ω
220
µF
6.3V
AVX
1149 F10
VOUT
3.3V/1A
*COILTRONICS CTX02-11932
**DALE WSC-1/2-0.1
IRFR9024
0V = NORMAL
>2V = SHUTDOWN
+
+
+
Figure 11. High Efficiency 8V to 20V Input 3.3V/3A Output Regulator
PGATE
VIN
VCC
PDRIVE
VCC
CT
ITH
SENSE–
CAP
SHDN2
RGND
NGATE
PGND
SGND
SHDN1
SENSE+
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
LTC1149-3.3
0.068
µF
0.047
µF
1N4148
1N4148
3300pF
1k
470pF
3.3
µF
1000pF
IRFZ34
1N5818
220
µF
35V
VIN
8V TO 20V
L*
33
µH
RSENSE**
0.033
Ω
220
µF
6.3V
× 2
AVX
1149 F11
VOUT
3.3V/3A
*COILTRONICS CTX33-4-KM
**KRL SL-1-C1-0R033J
IRF9Z34
SHUTDOWN
100
Ω
100
Ω
+
+
+



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