LTC1148HV Linear Technology, LTC1148HV Datasheet - Page 18

• Manufacturer Part Number: LTC1148HV
• Description: High Efficiency Synchronous Step-Down Switching Regulators
• Manufacturer: Linear Technology

LTC1148
LTC1148-3.3/LTC1148-5
18
TYPICAL APPLICATIO S
V
OUT
1N4148
Figure 16. 4V to 14V Input Voltage to 5V/1A Regulator with Current Foldback
R
1k
C
C
390pF
C
3300pF
+
T
C
1 F
C
270pF
NPO
**KRL NP-1A-C1-0R082J
T
*LOW ESR REQUIRED
U
Figure 15. High Efficiency 5V to 3.3V/4.5A Converter
1
2
3
4
5
6
7
R
470
C
P-DRIVE
NC
V
C
INTV
I
SENSE
C
3300pF
TH
IN
T
0.1 F
C
CC
LTC1148
–
**KRL SP-1-C1-0R020
SHUTDOWN
*COILTRONICS CTX10-5P
1
2
3
4
5
6
7
N-DRIVE
SENSE
P-DRIVE
NC
V
C
INTV
I
SENSE
TH
PGND
SGND
IN
T
V
NC
LTC1148-3.3
FB
CC
+
–
0.1 F
SHUTDOWN
14
13
12
11
10
9
8
N-DRIVE
SENSE
SHUTDOWN
PGND
SGND
NC
NC
+
14
13
12
11
10
9
8
Si9803DY
SHUTDOWN
50 H
1000pF
L2
10 H
*L
Si4435DY
R
0.082
SENSE
R
0.02
SENSE
**
MBRS140T3
Si9804DY
+
**
Si4412DY
D1
220 F*
10V
OS-CON
+
4V TO 14V
LTC1148 • F15
+
C
220 F
10V
AVX
V
+
V
OUT
IN
5V
2
IN
C
100 F
20V
C
100 F
20V
IN
IN
V
3.3V/4.5A
2
OUT
D1
MBRS140T3
100pF
50 H
L1
LTC1148 • F16
R2
75k
1%
R1
25k
1%
+
C
220 F
10V
OS-CON
OUT
V
5V/1A
OUT