TLV62569: Feedback resistor and feed forward cap setting

Roy Chou1

Part Number: TLV62569

Hi team,

I have two questions which are showing as below. I set the Vout = 0.9V.

For Vout setting, it's better to fix the bottom side feedback resistor=100k or top side feedback resistor=100k.

If I set top side= 49.9k and bottom side = 100k and we have already fine tuned the suitable Cff, if I change the feedback resistance but same ratio which I mean Rtop = 100k and Rbot = 200k. Should I need to re-fine tune the Cff?

Roy

over 3 years ago

0 Excel Regidor over 3 years ago

TI__Mastermind 26736 points

Hello Roy,

The guideline stated in the datasheet (Sec. 8.2.2.2) is to use a maximum resistance of 200-Kohm on the Rbot to achieve a low current consumption and acceptable noise sensitivity. If you choose Rtop = 49.9k and Rbot = 100k, then I don't see any concern because it becomes less susceptible to external noise. Besides, you don't need to fine-tune the Cff anymore.

Best regards,

Excel

0 Excel Regidor over 3 years ago in reply to Excel Regidor

TI__Mastermind 26736 points

Hello Roy,

If you don't have further questions, then I close this thread.

Thank you.

Best regards,

Excel

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TLV62569: Feedback resistor and feed forward cap setting