16

LT1680

– 48V to 5V 30W Forward Converter

220

µF

35V

SS

SYNC

LT1680

RUN/SHDN

7

1

15

IRF640

MBR0520LT1

MBR2045CT

MBR2045CT

13

10

9

16

11

14

1

µF

0.1

µF

300pF

1.5nF

T1

L1

20

µH

1nF 0.1

µF

0.1

µF

L1: PHILIPS EFD20-3F3-E63-S

OUTPUT 18T BIFILAR 22AWG

BIAS 54T BIFILAR 32AWG

T1: COILTRONICS VP5-1200, 1:1:1:1:1:1

(SIX WINDINGS EACH 77

µH)

*SANYO CV-GX

**SANYO OS-CON

ALL RESISTORS 1.4W, 1% UNLESS

INDICATED OTHERWISE

0.22

µF

2.2nF

16k

20k

78.7k

20k

1M

BAV21

L1

7.5k

10

Ω

24k

INPUT

COM

– 48V

INPUT

24k

24k

4.75k

1k

1680 TA03

2N7000

2N3904

23

4

5

6

12

8

GATE

SGND PGND

SL/ADJ

+

1.5nF

Q7

2N5401

330

µF**

6.3V

5V

6A

OUT

OUTPUT

COM

0.033

µF

33

Ω

4.22k

1.2k

33

Ω

0.015

Ω

1W

50

Ω

1W

1

µF

63V

1k

+

220

µF*

35V

+

220

µF*

35V

+

220

µF*

35V

+

220

µF*

35V

+

SW Package

16-Lead Plastic Small Outline (Wide 0.300)

(LTC DWG # 05-08-1620)

Dimensions in inches (millimeters) unless otherwise noted.

PART NUMBER

DESCRIPTION

COMMENTS

LT1268

7.5A, 150kHz Switching Regulator

Integrated Switch Can Be Used in Isolated Flyback Mode

LT1270A

10A, 60kHz Switching Regulator

Integrated Switch Can Be Used in Isolated Flyback Mode

LT1339

High Power Synchronous DC/DC Controller

Operation to 60V, No Shoot-Through N-Channel Output Drivers

LT1370

500kHz, 6A Boost Switching Regulator

Integrated Switch, Regulates Positive or Negative Outputs

LT1371

500kHz, 3A Boost Switching Regulator

Integrated Switch, Regulates Positive or Negative Outputs

S16 (WIDE) 0396

NOTE 1

0.398 – 0.413*

(10.109 – 10.490)

16

15

14

13

12

11

10

9

1

23

4

5

6

78

0.394 – 0.419

(10.007 – 10.643)

0.037 – 0.045

(0.940 – 1.143)

0.004 – 0.012

(0.102 – 0.305)

0.093 – 0.104

(2.362 – 2.642)

0.050

(1.270)

TYP

0.014 – 0.019

(0.356 – 0.482)

TYP

0

° – 8° TYP

NOTE 1

0.009 – 0.013

(0.229 – 0.330)

0.016 – 0.050

(0.406 – 1.270)

0.291 – 0.299**

(7.391 – 7.595)

× 45°

0.010 – 0.029

(0.254 – 0.737)

NOTE:

1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.

THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS

DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE

DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE

*

**

1680f LT/TP 0298 4K • PRINTED IN USA

© LINEAR TECHNOLOGY CORPORATION 1997

Linear Technology Corporation

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