TPS563210A: Inductor value selection

Hardy Xue

Part Number: TPS563210A

Hi team,

My customer use 1uH for output inductor on schematic. Our datasheet recommend the value is 1.5uH - 4.7uH.

What is the effect when they use 1uH inductor?

Vin = 8.5 - 17V

Vout = 1.8V

Iout = 2.1A

Best regards,

Hardy Xue

0 Young Zhao over 5 years ago

Hi,

Smaller inductor will bring in larger current ripple , and may need more Cout to reduce Vout ripple if there is requirement on output ripple .

Efficiency may drop a little .

And please also note that devices may trigger OC protection before full loading with smaller inductor and bad load transient performance.

We recommend to follow the table 2 in datasheet .

BRs,

Young

0 Hardy Xue over 5 years ago in reply to Young Zhao

Hi Young,

Thanks for your reply. I will remind customer these concerns.

Best regards,

Hardy Xue

Power management forum