LM2660: About FC-pin

Atsushi Takahashi

Part Number: LM2660
Other Parts Discussed in Thread: LM2663,

Hi Team,

My customer is going to replace LM2663 with LM2660.
According to the following post, if LV-pin is connected to GND LM2660 works at Fosc = 10kHz even if FC is connected to GND.
Does it mean that FC-pin has internal pull-down?

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1271884/lm2663-lm2663mx-alternative/4818337?tisearch=e2e-sitesearch&keymatch=LM2660%20FC#4818337

Best Regards,

over 1 year ago

0 Nini Zhong over 1 year ago

TI__Genius 13275 points

Hi Atsushi,

FC should be open and then the fosc is 10kHz.You'd better not connect it to GND. Once FC is open , fsc is settled to 10kHz. I don't think it's pull down, it's the signal to help set the fosc.

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LM2660: About FC-pin