XL1509-5.0E1

XL1509-5.0E1 is the SOIC-8 ordering code for the XLSEMI XL1509 fixed 5 V step-down converter, listed in the ordering table of the current XLSEMI datasheet (Rev 2.0). It delivers a regulated 5 V output held between 4.8 V and 5.2 V across a 7 V to 40 V input and a 0.2 A to 2 A load range, at 82 % typical efficiency, with an oscillator running at 127 kHz to 173 kHz (150 kHz typical) and an overall input range of 4.5 V to 40 V. The selection point is simplicity at industrial input voltages: a fixed-output buck with the feedback divider already set internally, so a 12 V or 24 V rail becomes a 5 V logic supply with just the inductor, catch diode and capacitors the datasheet application circuit specifies. Selection advice: the E1 code is the SOIC-8 packing of the fixed 5 V variant - the adjustable member of the same family (XL1509-ADJE1, also listed) shares the package but needs an external divider, so do not interchange the two codes on one bill of materials; and check thermal rise at sustained 2 A loads, since the SOIC body has no exposed power pad. Parameters verified against the XLSEMI XL1509 datasheet Rev 2.0 (ordering information and electrical characteristics).