19

LTC1149

LTC1149-3.3/LTC1149-5

TYPICAL APPLICATIO S

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 representation that

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

N16 1197

0.255

± 0.015*

(6.477

± 0.381)

0.770*

(19.558)

MAX

16

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

0.020

(0.508)

MIN

0.125

(3.175)

MIN

0.130

± 0.005

(3.302

± 0.127)

0.065

(1.651)

TYP

0.045 – 0.065

(1.143 – 1.651)

0.018

± 0.003

(0.457

± 0.076)

0.100

± 0.010

(2.540

± 0.254)

0.009 – 0.015

(0.229 – 0.381)

0.300 – 0.325

(7.620 – 8.255)

0.325

+0.035

–0.015

+0.889

–0.381

8.255

()

*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.

MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)

N Package

16-Lead PDIP (Narrow 0.300)

(LTC DWG # 05-08-1510)

Dimensions in inches (millimeters) unless otherwise noted.

PACKAGE DESCRIPTIO

Figure 16. 25W High Efficiency Regulator Using N-Channel MOSFET Switches

0.1

µF

PGATE

PDRIVE

CAP

SHDM2

RGND

NGATE

PGND

SGND

SHDN1

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

LTC1149-5

1N4148

3300pF

1k

820pF

3.3

µF

1000pF

IRFZ44

MBR380

1000

µF

63V

L*

50

µH

0.02

Ω

220

µF

10V

× 2

OS-CON

1149 F16

5V/5A

*COILTRONICS CTX50-5-52

**DALE LVR-3-0.02

12V TO 36V

100

Ω

100

Ω

0V = NORMAL

>2V = SHUTDOWN

VN2222LL

10k

470

Ω

2N2222

220

Ω

2N3906

0.1

µF

MTP30N06EL

MUR110

SEE APPLICATIONS INFORMATION TO SUPPRESS

Burst Mode

+

+

+