15

LT1302/LT1302-5

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

2 Li-Ion Cell to 5.8V/600mA DC/DC Converter

3 Cell to 3.3V Buck-Boost Converter with Auxiliary 12V Regulated Output

1302 TA05

LT1302

GND

PGND

SHDN

FB

SW

SHUTDOWN

169k

1%

200pF

100k

1%

24k

4700pF

10

Ω

0.1

µF

3

8

T1C

1

10

T1A

7

4

T1D

6

5

T1E

2.5V-8V

C3

47

µF

16V

+

2

9

T1B

22

µF

25V

+

C1

100

µF

16V

+

D1

D2

13V

C2

330

µF

6.3V

+

3.3V OUTPUT

400mA

330k

1%

3.3

µF

+

150k

1%

12V

120mA

T1 =

D1, D2 =

C1 =

C2 =

C3 =

DALE LPE-6562-A069, 1:3:1:1:1 TURNS RATIO, 10

µH PRIMARY. DALE (605) 665-9301

MOTOROLA MBRS130LT3

AVX TPSE107016R0100

AVX TPSE337006R0100

AVX TPSD476016R0150

LT1121

GND

IN

SHDN

ADJ

OUT

FB

SHDN

SHUTDOWN

L1

22

µH

L2

22

µH

PGND

1

µF

10

Ω

LT1302

GND

SW

20k

1302 TA07

5.8V

600mA

4V TO 9V

100k

1%

MBRS130LT3

365k

1%

+

++

C1

100

µF

16V

+

C2

220

µF

10V

C3

220

µF

10V

10nF

DUTY CYCLE =

L1, L2=COILCRAFT DO3316-223

C1=AVX TPSE107016R0100

C2, C3=AVX TPSE227010R0100