# \#decoupling-capacitor **URL:** https://sierraconnect.protoexpress.com/tag/decoupling-capacitor/18.md [Latest](https://sierraconnect.protoexpress.com/latest.md) · [Categories](https://sierraconnect.protoexpress.com/categories.md) · [Tags](https://sierraconnect.protoexpress.com/tags.md) --- ## [How do you decide the placement of decoupling capacitors in your layout?](https://sierraconnect.protoexpress.com/t/how-do-you-decide-the-placement-of-decoupling-capacitors-in-your-layout/3955)
**Author:** [@Sushmitha](https://sierraconnect.protoexpress.com/u/Sushmitha)\ **Replies:** 2\ **Last updated:** [April 1, 2026, 1:27pm UTC](https://sierraconnect.protoexpress.com/t/how-do-you-decide-the-placement-of-decoupling-capacitors-in-your-layout/3955 "2026-04-01T13:27:33Z")
We often see placement issues with decoupling capacitors during layout and DFM reviews, especially on high-speed and dense boards. I wanted to start a discussion on how designers approach decap placement to avoid power i… --- ## [6 Decap Placement Rules for PCB Designer](https://sierraconnect.protoexpress.com/t/6-decap-placement-rules-for-pcb-designer/3904)
**Author:** [@Mohamed\_Faheemuddin](https://sierraconnect.protoexpress.com/u/Mohamed_Faheemuddin)\ **Replies:** 0\ **Last updated:** [March 10, 2026, 12:24pm UTC](https://sierraconnect.protoexpress.com/t/6-decap-placement-rules-for-pcb-designer/3904 "2026-03-10T12:24:48Z")
Power integrity is a critical aspect of modern PCB design. As digital devices switch faster and consume higher transient currents, maintaining a stable power supply becomes challenging. Even small voltage fluctuations… --- ## [PCB Glossary: Decoupling Capacitors](https://sierraconnect.protoexpress.com/t/pcb-glossary-decoupling-capacitors/3413)
**Author:** [@Mohamed\_Faheemuddin](https://sierraconnect.protoexpress.com/u/Mohamed_Faheemuddin)\ **Replies:** 0\ **Last updated:** [August 1, 2025, 1:23pm UTC](https://sierraconnect.protoexpress.com/t/pcb-glossary-decoupling-capacitors/3413 "2025-08-01T13:23:06Z")
A decoupling capacitor (decap) is a passive electronic component placed between a power supply and an IC on a PCB. Its primary function is to filter out voltage spikes and high-frequency noise, providing a stable DC supp… --- ## [Decoupling Capacitor Placement Rules Every PCB Designer Should Know](https://sierraconnect.protoexpress.com/t/decoupling-capacitor-placement-rules-every-pcb-designer-should-know/3118)
**Author:** [@lucy.sierracircuits](https://sierraconnect.protoexpress.com/u/lucy.sierracircuits)\ **Replies:** 0\ **Last updated:** [April 24, 2025, 2:23pm UTC](https://sierraconnect.protoexpress.com/t/decoupling-capacitor-placement-rules-every-pcb-designer-should-know/3118 "2025-04-24T14:23:38Z")
Originally published at: https://www.protoexpress.com/blog/decoupling-capacitor-placement-guidelines-pcb-design/ Decoupling is a way of isolating signal components from composite signals based on frequency. Therefore… --- ## [OPEN DISCUSSION: What’s your approach to selecting and placing decoupling capacitors in your PCB designs?](https://sierraconnect.protoexpress.com/t/open-discussion-what-s-your-approach-to-selecting-and-placing-decoupling-capacitors-in-your-pcb-designs/3021)
**Author:** [@lucy.sierracircuits](https://sierraconnect.protoexpress.com/u/lucy.sierracircuits)\ **Replies:** 9\ **Last updated:** [April 4, 2025, 3:49pm UTC](https://sierraconnect.protoexpress.com/t/open-discussion-what-s-your-approach-to-selecting-and-placing-decoupling-capacitors-in-your-pcb-designs/3021 "2025-04-04T15:49:40Z")
How do you approach selecting and placing decoupling capacitors in your designs? Share your strategies for choosing values, placement techniques, and best practices for minimizing noise and ensuring power integrity. Let… --- ## [Best Decoupling Capacitor Placement Strategies for PCB Designs](https://sierraconnect.protoexpress.com/t/best-decoupling-capacitor-placement-strategies-for-pcb-designs/1626)
**Author:** [@lucy.sierracircuits](https://sierraconnect.protoexpress.com/u/lucy.sierracircuits)\ **Replies:** 15\ **Last updated:** [July 29, 2024, 8:35pm UTC](https://sierraconnect.protoexpress.com/t/best-decoupling-capacitor-placement-strategies-for-pcb-designs/1626 "2024-07-29T20:35:12Z")
Thank you for your interest in our webinar on best decoupling capacitor strategies by Lance Wang of Zuken and @ThePCBGuy. Already filled out the form on our registration page? You are all set and will receive an email c… --- ## [TIP: Place decoupling capacitors on the opposite side of the BGA right under the pin itself](https://sierraconnect.protoexpress.com/t/tip-place-decoupling-capacitors-on-the-opposite-side-of-the-bga-right-under-the-pin-itself/958)
**Author:** [@lucy.sierracircuits](https://sierraconnect.protoexpress.com/u/lucy.sierracircuits)\ **Replies:** 0\ **Last updated:** [January 29, 2024, 5:01pm UTC](https://sierraconnect.protoexpress.com/t/tip-place-decoupling-capacitors-on-the-opposite-side-of-the-bga-right-under-the-pin-itself/958 "2024-01-29T17:01:27Z")
This is how BGA will be fanned out with a via that is on the pad. Later, it can be filled with a conductive or non-conductive filling. Read more: Decoupling Capacitor Placement Guidelines | Sierra Circuits --- ## [What is the Use of a Decoupling Capacitor?](https://sierraconnect.protoexpress.com/t/what-is-the-use-of-a-decoupling-capacitor/158)
**Author:** [@lucy.sierracircuits](https://sierraconnect.protoexpress.com/u/lucy.sierracircuits)\ **Replies:** 0\ **Last updated:** [September 28, 2023, 6:31pm UTC](https://sierraconnect.protoexpress.com/t/what-is-the-use-of-a-decoupling-capacitor/158 "2023-09-28T18:31:23Z")
Originally published at: https://www.protoexpress.com/blog/decoupling-capacitor-use/ System noise has become a critical issue for both analog and digital devices. The requirement for speedy interfaces and lower power…