SY8303AIC

SY8303AIC is the TSOT-23-8 ordering code for the Silergy SY8303 synchronous buck converter, written word-for-word in the ordering information of the maker’s own application-note document for the family (AN_SY8303, Rev. 0.9A). It accepts an input of 4.5 V to 40 V, regulates against a reference of 0.591 V minimum, 0.6 V typical and 0.609 V maximum, shows switch on-resistances of 110 mΩ typical on the high side and 70 mΩ typical on the low side, a high-side current limit of 4 A minimum and 6.8 A maximum, a switching frequency adjustable from 500 kHz to 2.5 MHz by an external resistor, and a 3 A output capability. Silergy publishes no lifecycle grading scheme for this family; the code stands in the ordering table of the maker’s current document for the part. The selection point is a wide-input 3 A buck in an 8-pin package: the 40 V ceiling and the resistor-set frequency let one design cover automotive-accessory, industrial and surveillance-camera rails where a fixed-frequency 12 V-class converter would be marginal. Selection advice: the adjustable frequency is a design commitment, not a convenience - fix it in the schematic against the inductor and EMI plan, because the same code ships across the full 500 kHz to 2.5 MHz range depending on the external resistor. Parameters verified against the Silergy AN_SY8303 document Rev. 0.9A (ordering information and electrical characteristics).