LTC1149CS-3.3#PBF Linear Technology, LTC1149CS-3.3#PBF Datasheet - Page 18
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LTC1149CS-3.3#PBF
Manufacturer Part Number
LTC1149CS-3.3#PBF
Description
IC SW REG STEP-DOWN 3.3V 16-SOIC
Manufacturer
Linear Technology
Type
Step-Down (Buck)r
Datasheet
1.LTC1149CNPBF.pdf
(20 pages)
Specifications of LTC1149CS-3.3#PBF
Internal Switch(s)
No
Synchronous Rectifier
Yes
Number Of Outputs
1
Voltage - Output
3.3V
Current - Output
50mA
Frequency - Switching
250kHz
Voltage - Input
0 ~ 48 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
16-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
LTC1149
LTC1149-3.3/LTC1149-5
TYPICAL APPLICATIO S
18
+
1 F
+
3.3 F
48V
1N4148
V
0.047 F
390pF
IN
1k
1N4148
620pF
0.047 F
0.068 F
3300pF
**IRC LR2010-01-R050-G
Figure 15. Logic Selectable 5V/2A or 3.3V/2A High Efficiency Regulator
*COILTRONICS CTX50-2-MP
1k
1
2
3
4
5
6
7
8
0.068 F
3300pF
PGATE
V
V
PDRIVE
V
C
I
SENSE
TH
IN
CC
CC
T
Figure 14. High Efficiency 48V Input 5V/2.5A Output Regulator
–
U
LTC1149
**IRC LR2512-01-R040-G
*HURRICANE LAB HL-KI168M
1
2
3
4
5
6
7
8
PGATE
V
V
PDRIVE
V
C
I
SENSE
TH
IN
CC
CC
T
SENSE
SHDN2
NGATE
RGND
PGND
SGND
LTC1149-5
1N4148
CAP
–
V
FB
+
16
15
14
13
12
11
10
9
SENSE
SHDN2
SHDN1
NGATE
SHUTDOWN
RGND
PGND
SGND
1N4148
CAP
+
100pF
1000pF
8V TO 20V
16
15
14
13
12
11
10
9
V
IN
RFD15P05SM
RFD14N05SM
1000pF
SHUTDOWN
R1A
33k
1%
50 H
MTD2955
IRFZ34
L*
1N5818
68 H
R1B
43k
1%
L*
100
100
+
MBR380
R
0.05
100 F
35V
SENSE
56k
1%
R2
+
**
R
100 F
100V
0.04
SENSE
1149 F15
+
**
VN2222LL
220 F
10V 2
AVX
1149 F14
V
3.3V/2A
OR 5V/2A
OUT
+
0.1 F
220 F
10V
OS-CON
V
5V/2.5A
0V: V
5V: V
OUT
OUT
OUT
= 3.3V
= 5V