TPS54302 4.5-V to 28-V Input, 3-A Output, EMI-Friendly Synchronous Step-Down Converter
| Parts | Common Value | Note |
|---|---|---|
| Cin | 10+0.1 | |
| Cboot | 0.1 | |
| Lo | 10uh | |
| Rfb1 | 100K | |
| Rfb2 | 13.3K | |
| Cfb | 75pf | |
| Co | 22uf x2 |
SOT-23 (6) package
https://www.ti.com/lit/ds/symlink/tps54302.pdf
inductor
Lmin = [ 5V * (18V-5V) ] / 18V * Kin * Iout * Fsw
For this design example, use KIND = 0.35. The minimum inductor value is calculated as 9.78 μH. For this design, a close standard value of 10 μH was selected for LMIN.
- Larger value inductors have lower AC current and result in lower output voltage ripple.
- Smaller inductor values increase AC current and output voltage ripple.
