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AN3271 Datasheet(PDF) 16 Page - STMicroelectronics

Part # AN3271
Description  This application note provides
PDF  29 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3271 Datasheet(HTML) 16 Page - STMicroelectronics

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Automatic confirmation of power-up
AN3271
16/29
Doc ID 17933 Rev 2
8
Automatic confirmation of power-up
Connect PSHOLD directly to the output voltage VOUT in order to enable automatic
confirmation of power-up (see Figure 14). This allows immediate power-up but does not
guarantee proper startup of the application.
The enable signal EN (EN) is asserted immediately after pushing the PB button, thus
enabling VOUT. Since PSHOLD is connected directly to VOUT, power-up is confirmed
immediately and EN (EN) stays asserted. Please note that a small delay can be caused by
capacitors connected between ground and VOUT elsewhere in the application.
Figure 14.
Automatic confirmation of power-up



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