IU2403SA DC - DC Converter by XP Power. Package: SIL Dims : (L x W x H ) 21.85 x 9.2 x 11.1mm Ratings: Input Voltage : 18.0 ~ 36.0 V Output Voltage : 3.3V No load input current : 8 mA Output current : 500mA Efficiency : 70% single output. Download XP Power IU2403SA datasheet: Status: PNOS (Perfect New Old Stock) RoHS compliant: YES