# Buck converter IC suggestion for charging supercapacitors

**URL:** <https://forum.digikey.com/t/buck-converter-ic-suggestion-for-charging-supercapacitors/7699>\
**Category:** Design Tools and Resources\
**Tags:** analog-devices-inc, vishay, maxwell, documentation, part-identification\
**Created:** [July 30, 2020, 11:07pm UTC](https://forum.digikey.com/t/buck-converter-ic-suggestion-for-charging-supercapacitors/7699 "2020-07-30T23:07:44Z")\
**Posts on this page:** 1\
**Showing post:** 8

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**Author:** ![David\_1528](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/david_1528/32/47212_2.png) [@David\_1528](https://forum.digikey.com/u/David_1528)\
**Post date:** [July 31, 2020, 6:46pm UTC](https://forum.digikey.com/t/buck-converter-ic-suggestion-for-charging-supercapacitors/7699/8 "2020-07-31T18:46:45Z")

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> [@anishkgt](#):
>
> There are several components with an **x4** like the first filter capacitor 150uf 36v, the sense resistor. What do they mean ? Are they in series or parallel ?

The capacitors would always be in parallel. The resistors could either one. Look at the values and determine whether series or parallel equal the value specified.

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