SC1566(2001) データシートの表示（PDF） - Semtech Corporation

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SC1566
(Rev.:2001)

Very Low Dropout 3.0 Amp Regulator With Enable

Semtech Corporation 

POWER MANAGEMENT

Applications Information (Cont.)

( ) ( ) R = TH(J−A )(MAX )

TJ(MAX ) − TA (MAX )

PD(MAX )

= 150 − 85

1.81

= 36°C / W

R TH(J−C)(MAX ) = 3°C / W and R TH(C−S) = 0°C / W,

therefore R TH(S−A )(MAX ) = 33°C / W

Outline Drawing - T0-263-3

SC1566

This should be achievable for the TO-263 package using

pcb copper area to aid in conducting the heat away from

the device, such as a large (~2 squ. inch) pad connected

to the tab of the device. Internal ground/power planes

and air flow will also assist in removing heat. For higher

power dissipations it may be necessary to use a small

heatsink and the TO-220 package.

Minimum Land Pattern - TO-263-3

ã 2001 Semtech Corp.

7

www.semtech.com

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