8

LT1944-1

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

©LINEAR TECHNOLOGY CORPORATION 2001

19441f LT/TP 0801 2K • PRINTED IN USA

RELATED PARTS

PART NUMBER

DESCRIPTION

COMMENTS

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LT1317

2-Cell Micropower DC/DC with Low-Battery Detector

3.3V at 200mA from Two Cells, 600kHz Fixed Frequency

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LT1613

1.4MHz Switching Regulator in 5-Lead ThinSOT

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LT1615

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20V at 12mA from 2.5V Input, Tiny ThinSOT Package

LT1617

Micropower Inverting DC/DC Converter in 5-Lead ThinSOT

–15V at 12mA from 2.5V Input, Tiny ThinSOT Package

LT1930A

2.2MHz Boost DC/DC Converter in ThinSOT

5V at 450mA from 3.3V, Tiny ThinSOT Package

LT1944

Dual Micropower Step-Up DC/DC Converter

5V at 80mA and 30V at 8mA, MSOP Package

Burst Mode is a trademark of Linear Technology Corporation

Four Output Power Supply (

±5V, ±15V)

SW2

FB1

LT1944-1

2

3

L1

22

µH

D1

SHDN1

324k

1M

C2

4.7

µF

5V

20mA

15V

2mA

–15V

2mA

–5V

20mA

2.7V

TO 4.2V

1944-1 TA03

GND

7

PGND

9

PGND

10

86

SW1

4.7pF

C1

4.7

µF

FB2

4

1

5

SHDN2

L2

22

µH

D2

D3

D4

D6

D5

2M

178k

C3

1

µF

4.7pF

C1, C2, C7: TAIYO YUDEN JMK212BJ475

C3, C4: TAIYO YUDEN EMK212BJ105

C5, C6: TAIYO YUDEN EMK107BJ104

D1, D2, D3, D4, D5, D6: CENTRAL SEMI CMDSH3

L1, L2: MURATA LQH3C220

C5

0.1

µF

C6

0.1

µF

C7

4.7

µF

C4

1

µF

TYPICAL APPLICATIO