LTC1517-3.3 데이터 시트보기 (PDF) - Linear Technology

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LTC1517-3.3

Micropower, Regulated 3.3V Charge Pump in a 5-Pin SOT-23 Package

Linear Technology 

LTC1517-3.3

TYPICAL APPLICATION

Low Power Battery Backup Supply with Autoswitchover and No Reverse Current

MAIN

SUPPLY

5V

3 LT1521-3.3 1

1µF

2

BAT54

TRICKLE CHARGE

75k AND LTC1517-3.3

IDD

0.1µF

5

4

1 LTC1517-3.3 3

2-CELL

NiCd

3.3µF

2

1.5µF

SILICONIX

Si2301DS

3.3µF

VOUT = 3.3V,

IOUT = 300mA

(IOUT = 8mA IN

BACKUP MODE)

1.1M

3.9VTRIP

470k

7

3

+

8

4

–

5

6 LTC1540

21

LOGIC LOW = BACKUP MODE

1517-3.3 TA03

RELATED PARTS

PART NUMBER

LTC1514-X

LTC1515

LTC1516

LTC1517-5

LTC1522

DESCRIPTION

Step-Up/Step-Down Switched-Capacitor DC/DC Converter with

Low Battery Comparator

Step-Up/Step-Down Switched-Capacitor DC/DC Converter with POR

Micropower Regulated 5V Charge Pump DC/DC Converter

Micropower Regulated 5V Charge Pump in a 5-Pin SOT-23 Package

Micropower Regulated 5V Charge Pump DC/DC Converter

COMMENTS

3.3V or 5V Output up to 50mA

Fixed or Adjustable Output up to 50mA

20mA for VIN ≥ 2V, 50mA for VIN ≥ 3V

IOUT up to 20mA

Same as LTC1517-5 with Shutdown

8

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408)432-1900 q FAX:(408)434-0507 q www.linear-tech.com

15173fs, sn15173 LT/TP 0998 4K • PRINTED IN USA

© LINEAR TECHNOLOGY CORPORATION 1998

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