LT1431 Просмотр технического описания (PDF) - Linear Technology

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Компоненты Описание

производитель

LT1431

Programmable Reference

Linear Technology 

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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