XL401X系列降压恒压产品设计指南V1.pdf

VOUT *(VIN −VOUT) IRMS IOUT * (VIN)2 IOUTMAX *VOUT CIN ∆VIN *FSW *VINMIN R 2 VOUT 1.25V *(1+ ) R1 (VIN −VOUT) *D VOUT MAX MIN LMIN D 0.3 *IOUT *FSW VIN VIN −VOUT IDAVG IOUTMAX * VIN 0.3 *IOUT ∆VOUT _ C ∆VOUT _ ESR 0.3 *IOUT *ESR 8 *FSW *COUT ∆VOUT ∆VOUT _ C +∆VOUT