About Boost-Buck DC DC Converter

[schwang1970]

mc34063 buck boost

Hi, everyone
I am design a variable input voltage and variable output voltage dc-dc converter.
Input range is 1.65~3.9, output range is 1.8 ~3.3. Did anyone know how to use one inductor to implement this step up/down converter and how to control its loop
compensation and stability. This is a greate challenge.

 

[huojinsi]

mc34063 buck-boost

U have to read some basic materials of switch power and study the principle of switch power at first, then see the application note regarding switch power,at last begin to design. Go to search materials with google.

 

[petarpav]

boost-buck

Hi. Look in Application note AN920 for MC34063 page 17.
\https://www.onsemi.com/pub/Collateral/AN920-D.PDF

Best Regards.

 

[jluhzw]

boost-buck converter

hello schwang1970
I agree with huojinsi,you should refer some basic materials about power switch at first!

there is material that you may like it!

 

[jwfan]

mc34063 boost-buck

Your need a non-inverting Buck-Boost DC-DC. and your voltage level is relatively low. So, 4-switch Buck-Boost can be used. Linear Tech has some products you can use.

Added after 3 minutes:

This is the link of LT3440.
https://www.linear.com/pc/productDetail.do?navId=H0,C1,C1003,C1042,C1116,P2123