Hi team,
Which frequency is better for 12Vin?
Customer consider to use TPSM843B22 for FPGA and input voltage is 12V +/-10%.
From the datasheet,
Could you give me answer and brief explaination?
Kind regards,
Goto
A dc/dc converter is usually optimized for one or a couple of the following: physical size, transient response, efficiency or cost.
Size and efficiency usually are most common optimizations.
If optimizing for small size, a higher switching frequency is typically better since the external passives can be smaller.
If optimizing for efficiency, a lower switching frequency can be better since the switching losses will be lower.
However, the TPSM843B22 is a module and the inductor is integrated and a fixed value.
Input Voltage range and Output voltage are factors into a design decisions on switching frequency.
Regulating from 12V to 0.8V at 2200kHz is not an option because of minimum controllable on time.
I would recommend going to the product folder toward the bottome and using webench. https://www.ti.com/product/TPSM843B22
