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Adding soft-start to LDL1117

Question asked by Matt Staniszewski on Apr 27, 2018

Hi,

 

I'd like to use the fixed 3.3V variant of the LDL1117 on my board.  However, I have a concern with inrush current and wanted to add a soft-start if possible.  Can I modify the LDL1117 circuit to add in soft-start (i.e. adding a cap somewhere to control the ramp) or would it be better to add an external inrush limiter such as shown in the following app note: http://www.ti.com/lit/an/slyt096/slyt096.pdf ?

 

Thanks!

Matt

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