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AN2603 Datasheet(PDF) 13 Page - STMicroelectronics

Part # AN2603
Description  ST1S09 high efficiency synchronous buck converter
PDF  23 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2603 Datasheet(HTML) 13 Page - STMicroelectronics

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AN2603
Thermal considerations
Doc ID 13778 Rev 3
13/23
Considering that the device, mounted on the board with a good ground plane, has a thermal
resistance junction to ambient (RthJ-A) of about 55°C/W and considering an ambient
temperature of about 85°C, the junction temperature is:
Equation 16
T
J
85
0.552 55
115
°C
=
⋅
+
=



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