LT1431M 데이터 시트보기 (PDF) - Linear Technology
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LT1431M Datasheet PDF : 14 Pages
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Typical Applications
12V to 5V Buck Converter with Foldback Current Limit*
PULSE ENGINEERING
#PE-51515
VIN
VIN
LT1089 VOUT
HI-SIDE SWITCH
LOGIC IN
GND
MBR735
100Ω
0.5W
5k
1500pF
2
1
COMP
COLL
3 V+
8
REF
4 RTOP LT1431 RMID 7
GND-S
GND-F
5
6
*CONTACT LTC FOR HIGH EFFICIENCY
SWITCHING REGULATORS
+
5V, 7A
3300µF
LT1431 TA09
LT1431
Buck Converter Efficiency
80
VIN = 9V
70
VIN = 12V
60
VIN = 15V
50
40
30
0
12
34 5
ILOAD (A)
6 78
LT1431 TA10
4.5V
TO 5.5V
Isolated 5V to ± 15V Flyback Converter
COILTRONICS
CTX02-11934
MUR105
6, 7 9
0.47µF
3k
C*
–15V, 70mA
15k
+
50µF
• MUR105
4, 5
VIN
VOUT
LT1172
OR
LT1072
GND
VC
•
2
10
• MUR105
1
+
C*
15V, 70mA
Fully Loaded Output Ripple vs Filtering
C*
+
210µF
LT1172
LT1072
30mVP-P
40mVP-P
L*
+
+
100µF
100µF
6mVP-P
8mVP-P
*L BELL INDUSTRIES J.W. MILLER
DIVISION 9310-36 10µH, 450mA
LT1431 TA12
MEASURED EFFICIENCY
LT1172 67.8% AT 2.2WOUT
LT1072 68.6% AT 2.2WOUT
LT1071 61.1% AT 4.4WOUT
1.5k
4N36
0.68µF
2.4k
0.1µF
1 COLL
3
V+
8
REF
20k 2
LT1431
COMP
GND-S
GND-F
5
6
LT1431 TA11
13.3k
2.7k
1431fd
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