LT1425 Linear Technology, LT1425 Datasheet - Page 20

• Manufacturer Part Number: LT1425
• Description: Isolated Flyback Switching Regulator
• Manufacturer: Linear Technology

LT1425
RELATED PARTS
PART NUMBER
LT1105
LTC
LT1170/71/72
LT1372/77
LT1424
20
TYPICAL
INPUT
COM
12V
22 F
®
35V
1145/46
+
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone] www.linear-tech.com
1.8k
0.1 F
APPLICATION
DESCRIPTION
Off-Line Switching Regulator
Isolated Digital Data Transceivers
5A/3A/1.25A Flyback Regulators
500kHz/1MHz Boost/Flyback Regulators
Application Specific Isolated Regulator
2.4k
D1
1N755
7.5V
Q1
2N3906
1000pF
25.5k
3.01k
1%
1%
U
1
2
3
4
5
6
7
8
1000pF
GND
NC
R
V
R
SYNC
SGND
GND
C
FB
REF
LT1425
R
R
OCOMP
CCOMP
SHDN
PGND
GND
GND
12V to 5V Isolated Converter
V
V
SW
IN
16
15
14
13
12
11
10
9
0.1 F
COMMENTS
Built-In Isolated Regulation Without Optoisolator
Up to 200kbps Data Rate, UL Listed
Isolated Flyback Mode for Higher Currents
Uses Ultrasmall Magnetics
8-Pin Fixed Voltage Version of LT1425
9.3k
1%
10
MUR120
MMFT1N10E
4
2
1
5
3
6
10
7
1425fa LT/TP 1198 2K REV A • PRINTED IN USA
11
8
LINEAR TECHNOLOGY CORPORATION 1997
COILTRONICS
VP1-0190
TURNS RATIO 1 : 1 : 1 : 1 : 1 : 1
12 H PER WINDING
407-241-7876
100
MBRS340T3
220 F
12
9
10V
+
330pF
220 F
10V
+
1425 TA05
200
5V
1A
OUT
COM