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I need to use this part for low current output. Input is 12V and output is 3.3V@0.2A for one application and for another application input is 12V and output is 5V@0.15A. It is my understanding to use higher inductor around 10uH instead of 2.2uH as recommended in the data sheet. In data sheet table is provided for selection of inductor, output cap and feedback resistors but not provided what is the input, output current. Especially inductor value can not be generalised as it depends on input and output current. In webench also it is suggested for 2.2uH, and 3.3uH for these applications. Is there any specific reason to use these inductor values? Please suggest. Also please suggest for the procedure to reduce over current limit.
Thanks, Harikant
Hi Anthony,
Thanks for your reply. Using 2.2uH, inductor current swing is around 2A and using 4.7uH (max value in the table) swing is around 1A. Is this ok for 200mA output load. Yes by increasing inductor value, loop response is disturbed, can it be possible by reducing output capacitor value, response loop can be maintained. Please suggest.
Thanks and Regards
Harikant
Hi
Thanks for the reply. Design will be finalize using 4.7uH.
Thanks and Regards
Harikant