SLVAF11 June 2021 TPS51397A , TPS566231 , TPS566235 , TPS566238 , TPS568230
For TPS568230 Ioutmax=8A, Vref=0.6V. PM is the phase margin of converter. All the capacitors used in the validation are MLCC. With POSCAP or electrolytic capacitors, the phase margin can be boosted with ESR zero and that could bring larger range of output capacitance values.
| Vin (V) | Vo (V) | fsw (kHz) | Llimits (uH) | Lchoose(uH) | Climits (uF) | Cchoose(uF) | PMestimated | PMexperiment |
|---|---|---|---|---|---|---|---|---|
| 6 | 0.9 | 600 | 0.4-0.8 | 0.68 | 85-393 | 376 | 47.1° | 52.9° |
| 6 | 1.2 | 600 | 0.5-1 | 0.68 | 64-297 | 282 | 45.8° | 51.9° |
| 6 | 1.5 | 600 | 0.59-1.17 | 1 | 34-158 | 132 | 48.5° | 46.9° |
| 6 | 1.8 | 600 | 0.66-1.31 | 1 | 28-129 | 110 | 46.7° | 47.1° |
| 18 | 0.9 | 600 | 0.45-0.89 | 0.68 | 85-393 | 376 | 49.3° | 53.9° |
| 18 | 1.2 | 600 | 0.58-1.17 | 1 | 43-200 | 188 | 52.6° | 54.4° |
| 18 | 1.8 | 600 | 0.84-1.69 | 1.5 | 19-89 | 88 | 54.2° | 48.1° |