LT1940 Ver la hoja de datos (PDF) - Linear Technology

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LT1940

Dual Monolithic 1.4A, 1.1MHz Step-Down Switching Regulator

Linear Technology 

LT1940/LT1940L

TYPICAL APPLICATIO S

VIN

10V TO 25V

C3

4.7µF

OUT1

3.3V

1.4A

D3A

L1

3.3µH

16.5k

3.3V, ±5V

D3B

0.1µF

D1

VIN

BOOST1 BOOST2

LT1940

SW1

SW2

FB1

FB2

0.1µF

1µF

D2

D5

C4

10µF

OUT3

–5V

300mA

47k

L2

4.7µH

30.1k

OUT2

5V

600mA

C1

10µF

10.0k

15k

100k

330pF

VC1

VC2

PG1

PG2

RUN/SS1 RUN/SS2

1nF

GND

2.2nF

20k

10.0k

220pF

C2

10µF

PGOOD

–5V LOAD SHOULD BE

LESS THAN 1/2 5V LOAD

(SEE DESIGN NOTE 100).

1940 TA05

C1, C2, C4: TAIYO YUDEN JMK316BJ106ML

C3: TAIYO YUDEN TMK325BJ475ML

D1, D2: MICROSEMI UPS140 OR ON SEMI MBRM140

D3: BAT-54A

D5: ON SEMI MBR0530

L1: SUMIDA CR43-3R3

L2: COILTRONICS CTX5-1A

VIN

6V TO 16V

C3

4.7µF

PGOOD

Low Ripple, Low Profile 12V to 3.3V/2.4A

Maximum Height = 2.1mm

VIN

1nF

RUN/SS1 BOOST1

RUN/SS2

0.1µF

100k

6.8k

680pF

PG1

SW1

PG2

LT1940

VC1

VC2

BOOST2

330pF

16.5k

FB1

FB2

SW2

GND

10.0k

D1

0.1µF

D2

D3A

L1

4.1µH

D3B

L2

4.1µH

C1

22µF

D1, D2: MICROSEMI UPS120

D3: BAT-54A

L1, L2: SUMIDA CDRH5D18-4R1

C1: TAIYO YUDEN JMK316BJ226ML

C3: TAIYO YUDEN EMK325BJ475MN

OUT2

3.3V

2.4A

1940 TA06

1940fa

18

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