Datasheet

17
LTC1148
LTC1148-3.3/LTC1148-5
114835fd
TYPICAL APPLICATIO S
U
1
2
3
4
5
6
7
14
13
12
11
10
9
8
P-DRIVE
NC
V
IN
C
T
INTV
CC
I
TH
SENSE
–
N-DRIVE
NC
PGND
SGND
SHUTDOWN
NC
SENSE
+
LTC1148L-3.3
1µF
1000pF
R
SENSE
**
0.05Ω
SHUTDOWN
*L
25µH
MMSF5N02HD
D1
MBRS140T3
MMSF3P02HD
+
C
IN
100µF
20V
V
IN
3.5V TO 14V
+
C
OUT
220µF
10V
×2
AVX
V
OUT
3.3V/2A
C
C
3300pF
R
C
1k
C
T
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
V
IN
C
T
INTV
CC
I
TH
SENSE
–
N-DRIVE
NC
PGND
SGND
SHUTDOWN
NC
SENSE
+
LTC1148-3.3
0.1
µ
F
1000pF
R
SENSE
**
0.02
Ω
SHUTDOWN
*L
10
µ
H
Si9804DY
D1
MBRS140T3
Si9803DY
+
C
IN
100
µ
F
20V
×
2
V
IN
5V
+
C
OUT
220
µ
F
10V
AVX
×
2
V
OUT
3.3V/4.5A
C
C
3300pF
R
C
470
Ω
C
T
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
V
IN
C
T
INTV
CC
I
TH
SENSE
–
N-DRIVE
NC
PGND
SGND
SHUTDOWN
V
FB
SENSE
+
LTC1148
1µF
1000pF
R
SENSE
**
0.05Ω
1M
*L
50µH
Si4412DY
D1
MBRS140T3
+
V
IN
4V TO 9V
+
C
OUT
220µF
10V
×2
OS-CON
V
OUT
–5V/1.4A
C
C
6800pF
R
C
1k
C
T
560pF
LTC1148 • F15
10nF
Si4431DY
C
IN
220µF
20V
R1
25k
1%
R2
75k
1%
200pF
TP0610L
V
IN
: ACTIVE
0V: SHUTDOWN
*COILTRONICS CTX50-2-MP
**KRL SL-1-C1-0R050J
+
Figure 15. 4V to 9V Input Voltage to –5V/1A Regulator