3509 Просмотр технического описания (PDF) - Linear Technology

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3509

Dual 36V, 700mA Step-Down Regulator

Linear Technology 

LT3509

TYPICAL APPLICATIONS

1.8V and 3.3V Outputs, Synchronized to 300kHz to 600kHz

VIN

4.5V TO 36V

(TRANSIENT TO 60V)

2.2μF

VOUT

1.8V

0.7A

10μH

VIN

BD

BOOST1 BOOST2

0.22μF

SW1

SW2

UPS140

LT3509

CLOCK

1.6V

12.4k

10k

22μF

DA1

DA2

FB1

FB2

RUN/SS1 RUN/SS2

SYNC RT GND

22nF

178k

0.4V

NOTE: RT CHOSEN FOR 264kHz

0.22μF 15μH

UPS140

31.6k

10k

22nF

3509 TA03

VOUT

3.3V

0.7A

22μF

Automotive Accessory Application

5V Logic Supply and 8V for LCD Display with Display Power Controlled by Logic

VIN

9.4V TO 36V

VOUT

5V

0.7A

10μF

2.2μF

VIN

BD

6.8μH

DFLS140L

0.22μF

BOOST1 BOOST2

SW1

SW2

LT3509

52.3k

DA1

DA2

FB1

FB2

RUN/SS1 RUN/SS2

10k

SYNC RT GND

22nF

40.2k

0.22μF 10μH

DFLS140L

90.9k

10k

10k

0.1μF

VOUT

8V

0.7A

10μF

DISPLAY POWER

CONTROL

0V = OFF

3.3V = ON

fSW = 1MHz

3509 TA04

3509fc

20

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