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LTC1148CS Datasheet(PDF) 18 Page - Linear Technology

Part # LTC1148CS
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

LTC1148CS Datasheet(HTML) 18 Page - Linear Technology

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18
LTC1148
LTC1148-3.3/LTC1148-5
114835fd
TYPICAL APPLICATIO S
1
2
3
4
5
6
7
14
13
12
11
10
9
8
P-DRIVE
NC
VIN
CT
INTVCC
ITH
SENSE–
N-DRIVE
NC
PGND
SGND
SHUTDOWN
VFB
SENSE+
LTC1148
1µF
0.1µF
RSENSE**
0.082Ω
SHUTDOWN
L2
50µH
+
VIN
4V TO 14V
VOUT
5V/1A
CC
3300pF
RC
1k
CT
390pF
LTC1148 • F16
Si4435DY
CIN
100µF
20V
100pF
220µF*
10V
OS-CON
D1
MBRS140T3
R1
25k
1%
R2
75k
1%
+
COUT
220µF
10V
OS-CON
L1
50µH
*LOW ESR REQUIRED
**KRL NP-1A-C1-0R082J
Si4412DY
VOUT
1N4148
Figure 16. 4V to 14V Input Voltage to 5V/1A Regulator with Current Foldback
1
2
3
4
5
6
7
14
13
12
11
10
9
8
P-DRIVE
NC
VIN
CT
INTVCC
ITH
SENSE–
N-DRIVE
NC
PGND
SGND
SHUTDOWN
VFB
SENSE+
LTC1148
1µF
1000pF
RSENSE**
0.05Ω
SHUTDOWN
*L
50µH
NDS9410A
D1
MBRS140T3
+
VIN
5.2V TO 14V
COUT
220µF
10V
× 2
OS-CON
VOUT
3.3V/2A
OR 5V/2A
CC
3300pF
RC
1k
CT
390pF
*COILTRONICS CTX50-2-MP
**KRL SL-1-C1-0R050R
LTC1148 • F17
10nF
NDS9435A
CIN
100µF
20V
100pF
R1B
43k
1%
R2
56k
1%
R1A
33k
1%
VN2222LL
0V: VOUT = 3.3V
5V: VOUT = 5V
Figure 17. Logic Selectable 5V/1A or 3.3V/1A High Efficiency Regulator



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