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AST1S31HF Datasheet(PDF) 24 Page - STMicroelectronics

Part # AST1S31HF
Description  Internal soft-start and enable
PDF  33 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AST1S31HF Datasheet(HTML) 24 Page - STMicroelectronics

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Application information
AST1S31HF
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DocID026968 Rev 2
Figure 10. PCB layout example
AM11423v1
Input cap as
close as possible
to VINSW pin
Star center for common ground
Short FB trace
VINA derived from Cin
To avoid dynamic voltage drop
Between VINA and VINSW
Short high
switching
current loop
Via to connect the thermal pad
To bottom or inner ground plane



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