23

LT1683

1683f

PACKAGE DESCRIPTIO

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.

TYPICAL APPLICATIO

Ultralow Noise 48V to

±12V DC/DC Converter

L1

10

µH

C2

33

µF

16V,

×2

C1

33

µF

16V,

×2

MBR01100

L2

10

µH

3

10

1683 TA03

11

13

SHDN

CAP A

NFB

LT1683

GND

17

14

2

GCL

SS

V5

SYNC

GATE A

5

1

CAP B

6

18

GATE B

7

19

8

16

15

12

CS

4

PGND

20

FB

9

5pF

5pF

Si9422

Si9422

0.068

Ω

976

Ω

23.2k

10nF

1k

3.3k

25k

25k

3.3k

16.9k

1200pF

47

µF

100V

48V

C3

10

µF

25V

12V

8.2V

10k

510

Ω

0.5W

2N3904

C4

22

µF

50V

25pF

22nF

0.22

µF

8.66k

1k

2.74k

10.0k

FZT853

5pF

200V

25pF

5pF

200V

–12V/1A

12V/1A

D1

D4

D5

D7

D6

D2

D3

CTX0215542

T1

1

2

3,4

5

6

7

8,9

10

C1, C2:SANYO 16TPC33

C3: MURATA GRM235Y5V106Z

C4: NIPPON THCR60EIE226Z

D1, D2, D3 IN4148

D4, D5, D6, D7 MBRS1100

L1, L2: COOPER DS50224

T1: COOPER CTX02-15542

G Package

20-Lead Plastic SSOP (5.3mm)

(Reference LTC DWG # 05-08-1640)

G20 SSOP 0501

.13 – .22

(.005 – .009)

0

° – 8°

.55 – .95

(.022 – .037)

5.20 – 5.38**

(.205 – .212)

7.65 – 7.90

(.301 – .311)

12 3

4

5

6 7 89 10

7.07 – 7.33*

(.278 – .289)

17

18

14 13 12 11

15

16

19

20

1.73 – 1.99

(.068 – .078)

.05 – .21

(.002 – .008)

.65

(.0256)

BSC

.25 – .38

(.010 – .015)

MILLIMETERS

(INCHES)

DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH

SHALL NOT EXCEED .152mm (.006") PER SIDE

DIMENSIONS DO NOT INCLUDE INTERLEAD FLASH. INTERLEAD

FLASH SHALL NOT EXCEED .254mm (.010") PER SIDE

*

**

NOTE:

1. CONTROLLING DIMENSION: MILLIMETERS

2. DIMENSIONS ARE IN

3. DRAWING NOT TO SCALE