Dear Sir,
As below transient load waveform(output current 5A to 0A transient), output voltage overshoot too high over 200mV,
Vin=20V ~ 36V, Vo=12V/34A, circuit design interleaved mode(refer datasheet page 32 circuit)
DEM pin= floating(would improve light load efficiency)
RT=22Kohm(Fosc=220KHz); Output chock(L1= L2)=3.3uF,
RAMP(R14+ C20) =73.2Kohm + 820pF ; COPM1(R7 + C17 +C16)= 49K + 682pF + 100pF
Does L1=L2=3.3uH to low? 6.8uH is OK ?
Please you kindly review & provide suggestion(how to improve transient over-shoot)..
Thanks!
Steven