Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Add another low-pass filter consisting of an inductor (value depends on the ripple frequency) and a couple of output capacitors (one electrolytic and one ceramic).
Regards,
IanP
Although your capacitance is large, but it doesn't mean it is good
Try to use multiple 1uF or 4.7uF capacitor instead of one 10uF
If it is possible, use SMD rather than through hole
for buck regulator, I think the switch frequency and the output capacitor are the key factor affecting the output ripple.
and, you should pay attention to the type of capacitor. The ESR differs very much for different kinds of cap.
1. Keep short lines between: power transistor and chatchup diode, input filter capacitor and power transistor.
2. Use power plane for GND.
3. Use low ESR capacitor for input and output capacitors.
4. Increase switching frequency.
5. Route carefully feedback lines, and make wise choice of feedback topology.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
