THEORY OF OPERATION
Overtemperature Protection
The SP619 has built-in overtemperature
protection to protect the part against dam-
age if the die temperature gets too hot. The
typical thermal cutoff is about 150ºC. The
part will self recover if the temperature drops
below the thermal restart threshold of about
120ºC.
Layout Considerations
The input and output decoupling capacitors
should be placed as close as possible to the
thermal performance. The input and output
traces should be as large as possible. The
and should be placed close to the output de-
coupling cap.
Vin
146-6642-00
U1
Vout
ON/OFF
Solved by
GND
TM
SP619
Recommended Layout
April 2008 Rev L
SP619 High Current Power Switch
© 2008
EXAR
Corporation
5
EXAR [ EXAR CORPORATION ]
