11

LT1117/LT1117-2.85

LT1117-3.3/LT1117-5

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.

The SOT-223 is manufactured with gull wing leadform for

surface mount applications. The leads and heat sink are

solder plated and allow easy soldering using nonactive or

mildly active fluxes. The package is constructed with three

leads exiting one side of the package and one heat sink

exiting the other side, and the die attached to the heat sink

internally.

The recommended methods of soldering SOT-223 are:

vapor phase reflow and infrared reflow with preheat of

component to within 65

°Cofthesoldertemperature.Hand

soldering and wave soldering are not recommended since

these methods can easily damage the part with excessive

thermal gradients across the package.

Care must be exercised during surface mount to minimize

large (> 30

°C per second) thermal shock to the package.

LT1117 • TA15

Dimensions in inches (millimeters) unless otherwise noted.

PACKAGE DESCRIPTIO

M Package

3-Lead Plastic DD Pak

(LTC DWG # 05-08-1460)

M (DD3) 1098

0.050

(1.270)

BSC

0.143

+0.012

– 0.020

()

3.632

+0.305

–0.508

0.090 – 0.110

(2.286 – 2.794)

0.013 – 0.023

(0.330 – 0.584)

0.095 – 0.115

(2.413 – 2.921)

0.004

+0.008

–0.004

()

0.102

+0.203

–0.102

0.050

± 0.012

(1.270

± 0.305)

0.059

(1.499)

TYP

0.045 – 0.055

(1.143 – 1.397)

0.165 – 0.180

(4.191 – 4.572)

0.330 – 0.370

(8.382 – 9.398)

0.060

(1.524)

TYP

0.390 – 0.415

(9.906 – 10.541)

15

° TYP

0.300

(7.620)

0.075

(1.905)

0.183

(4.648)

0.060

(1.524)

0.060

(1.524)

0.256

(6.502)

BOTTOM VIEW OF DD PAK

HATCHED AREA IS SOLDER PLATED

COPPER HEAT SINK

SOLDERI G

ETHODS

0.114 – 0.124

(2.90 – 3.15)

0.248 – 0.264

(6.30 – 6.71)

0.130 – 0.146

(3.30 – 3.71)

0.264 – 0.287

(6.70 – 7.30)

0.0905

(2.30)

NOM

0.033 – 0.041

(0.84 – 1.04)

0.181

(4.60)

NOM

0.024 – 0.033

(0.60 – 0.84)

0.071

(1.80)

MAX

10

°

MAX

0.012

(0.31)

MIN

0.0008 – 0.0040

(0.0203 – 0.1016)

10

° – 16°

0.010 – 0.014

(0.25 – 0.36)

10

° – 16°

ST3 (SOT-233) 1298

ST Package

3-Lead Plastic SOT-223

(LTC DWG # 05-08-1630)