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LTC1148CS Datasheet(PDF) 17 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) 17 Page - Linear Technology

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17
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
NC
SENSE+
LTC1148L-3.3
1µF
1000pF
RSENSE**
0.05Ω
SHUTDOWN
*L
25µH
MMSF5N02HD
D1
MBRS140T3
MMSF3P02HD
+
CIN
100µF
20V
VIN
3.5V TO 14V
COUT
220µF
10V
× 2
AVX
VOUT
3.3V/2A
CC
3300pF
RC
1k
CT
270pF
*COILTRONICS CTX25-5 Kool Mµ CORE
**IRC LR2512-01-R050-G
LTC1148 • F13
Figure 13. 5V Input Voltage, 3.3V/2A Low Dropout, High
Efficiency Regulator
Figure 14. High Efficiency 5V to 3.3V/4.5A Converter
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
NC
SENSE+
LTC1148-3.3
0.1µF
1000pF
RSENSE**
0.02Ω
SHUTDOWN
*L
10µH
Si9804DY
D1
MBRS140T3
Si9803DY
+
CIN
100µF
20V
× 2
VIN
5V
COUT
220µF
10V
AVX
× 2
VOUT
3.3V/4.5A
CC
3300pF
RC
470Ω
CT
270pF
NPO
*COILTRONICS CTX10-5P
**KRL SP-1-C1-0R020
LTC1148 • F14
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
1M
*L
50µH
Si4412DY
D1
MBRS140T3
+
VIN
4V TO 9V
COUT
220µF
10V
× 2
OS-CON
VOUT
–5V/1.4A
CC
6800pF
RC
1k
CT
560pF
LTC1148 • F15
10nF
Si4431DY
CIN
220µF
20V
R1
25k
1%
R2
75k
1%
200pF
TP0610L
VIN: ACTIVE
0V: SHUTDOWN
*COILTRONICS CTX50-2-MP
**KRL SL-1-C1-0R050J
Figure 15. 4V to 9V Input Voltage to – 5V/1A Regulator



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