component
SY50281AAC
Public Made by Adomby adom
Silergy Corp AC-DC Controllers And Regulators, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511
{
"schema_version": 1,
"type": "component",
"slug": "sy50281aac",
"title": "SY50281AAC",
"brief": "Silergy Corp AC-DC Controllers And Regulators, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
"license": "CC-BY-SA-4.0",
"tags": [
"component",
"power management (pmic)",
"sy50281aac",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "SY50281AAC",
"manufacturer": "Silergy Corp",
"package": "SOT-23-5",
"pin_count": 5,
"category": "Power Management (PMIC)",
"subcategory": "AC-DC Controllers And Regulators",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588911189514997760",
"parts": {
"symbol": "sy50281aac.kicad_sym",
"footprint": "sy50281aac.kicad_mod",
"model_3d": "sy50281aac-hero.glb",
"model_3d_plain": "sy50281aac-etched.glb",
"model_3d_step": "sy50281aac-etched.step",
"model_3d_step_plain": "sy50281aac.step",
"lbr": "sy50281aac.lbr"
},
"distributor_links": {
"lcsc": "C340251"
},
"distributor_check": {
"checked_at": "2026-10-18T16:37:23Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "quota"
},
"mouser": {
"pn": null,
"status": "quota"
}
},
"pins": [
{
"number": "1",
"name": "VSEN",
"type": "input",
"description": "Voltage sense pin that connects to a resistor divider on the inductor or auxiliary winding to sense output voltage, with absolute maximum rating of -0.3V to 17V and internal reference of 1.25V typical (1.215V to 1.285V)."
},
{
"number": "2",
"name": "VIN",
"type": "power_in",
"description": "Power supply pin with recommended operating range of 8V to 15.4V and absolute maximum of -0.3V to 17V and 20mA input current."
},
{
"number": "3",
"name": "GND",
"type": "power_in",
"description": "Ground pin for the controller."
},
{
"number": "4",
"name": "ISET",
"type": "passive",
"description": "Current set pin where a resistor programs the reference output current, with absolute maximum of -0.3V to 3.6V and reference voltage VREF of 675mV typical (620mV to 710mV)."
},
{
"number": "5",
"name": "LX",
"type": "output",
"description": "Internal high-voltage MOSFET drain pin rated for 500V breakdown voltage, with absolute maximum drain current of 1.4A."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"extractor": "extract_pins 0.3",
"primary_model": "claude-haiku-5-5",
"primary_mode": "text",
"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The SY50281AAC is listed in the ordering table as package SOT23-5 (page 1), and the pinout (page 2) ; KiCad pin types were not stated by the source and were inferred from function: VSEN is an input sens; Pin 5 LX is described in the source only as the internal HV MOSFET drain; the 500V and 1.4A figures "
],
"pages_sent": 12,
"cost_usd": 0.0515,
"at": "2026-10-18T16:35:08"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588911189514997760",
"pages": 12,
"sha256": "b5a1ca616f8ad540",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 5,
"described": 5,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "sy50281aac.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
2.8,
2.9,
1.55
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "720a6eab0024069bbee68e7cb4c3ff1149468a34611225cdc852662c5d0ec2b7",
"checked": "2026-10-18",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "sy50281aac-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
2.8,
2.9,
1.55
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "7ac9d63286a62d6b9fac6528c9ee8fa829ecba563bdb27eb67ad7a28765146b8",
"checked": "2026-10-18",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Silergy Corp",
"Package": "SOT-23-5",
"Category": "Power Management (PMIC)",
"Pins": "5"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "b5a1ca616f8ad540eef2dc706e6176c670d6ea297313c1e66f342d39f1f26d74",
"rows": [
{
"name": "VIN supply voltage (recommended operating)",
"symbol": "VIN",
"kind": "recommended_operating",
"unit": "V",
"min": 8,
"typ": null,
"max": 15.4,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Junction temperature range (recommended operating)",
"symbol": "",
"kind": "recommended_operating",
"unit": "°C",
"min": -40,
"typ": null,
"max": 125,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "ISET pin voltage (absolute maximum)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": 3.6,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "VIN, VSEN pin voltage (absolute maximum)",
"symbol": "VIN, VSEN",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": 17,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "VIN pin input current (absolute maximum)",
"symbol": "IVIN",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 20,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "LX drain current (absolute maximum)",
"symbol": "ILX",
"kind": "absolute_maximum",
"unit": "A",
"min": null,
"typ": null,
"max": 1.4,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "LX pin voltage (absolute maximum)",
"symbol": "LX",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 500,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Maximum junction temperature (absolute maximum)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "°C",
"min": null,
"typ": null,
"max": 160,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Lead temperature (absolute maximum)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "°C",
"min": null,
"typ": null,
"max": 260,
"conditions": "Soldering, 10 sec.",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Storage temperature range (absolute maximum)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "°C",
"min": -65,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "VSEN pin reference voltage",
"symbol": "VVSEN,REF",
"kind": "electrical",
"unit": "V",
"min": 1.215,
"typ": 1.25,
"max": 1.285,
"conditions": "VIN = 12V, TA = 25°C",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Min ON time",
"symbol": "tON,MIN",
"kind": "timing",
"unit": "ns",
"min": 300,
"typ": null,
"max": null,
"conditions": "VIN = 12V, TA = 25°C",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Max ON time",
"symbol": "tON,MAX",
"kind": "timing",
"unit": "µs",
"min": null,
"typ": null,
"max": 25,
"conditions": "VIN = 12V, TA = 25°C",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Min OFF time",
"symbol": "tOFF,MIN",
"kind": "timing",
"unit": "µs",
"min": 1.8,
"typ": null,
"max": null,
"conditions": "VIN = 12V, TA = 25°C",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Max OFF time",
"symbol": "tOFF,MAX",
"kind": "timing",
"unit": "µs",
"min": null,
"typ": null,
"max": 150,
"conditions": "VIN = 12V, TA = 25°C",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Max switching frequency",
"symbol": "fMAX",
"kind": "timing",
"unit": "kHz",
"min": null,
"typ": null,
"max": 45,
"conditions": "VIN = 12V, TA = 25°C",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Current reference",
"symbol": "VREF",
"kind": "electrical",
"unit": "mV",
"min": 620,
"typ": 675,
"max": 710,
"conditions": "VIN = 12V, TA = 25°C",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Package thermal resistance, junction-to-ambient (SOT23-5)",
"symbol": "θJA",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": 88,
"max": null,
"conditions": "SOT23-5; Note 2 test board (JEDEC 51-3)",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Package thermal resistance, junction-to-case (SOT23-5)",
"symbol": "θJC",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": 45,
"max": null,
"conditions": "SOT23-5",
"source_page": 3,
"source": "datasheet"
},
{
"name": "VIN turn-on threshold",
"symbol": "VVIN,ON",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 14,
"max": null,
"conditions": "VIN = 12V, TA = 25°C",
"source_page": 4,
"source": "datasheet"
},
{
"name": "VIN turn-off threshold",
"symbol": "VVIN,OFF",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 7,
"max": null,
"conditions": "VIN = 12V, TA = 25°C",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Start up current",
"symbol": "IST",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 15,
"max": null,
"conditions": "VIN = 12V, TA = 25°C",
"source_page": 4,
"source": "datasheet"
},
{
"name": "BV of HV MOSFET",
"symbol": "VBV",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 500,
"max": null,
"conditions": "VIN = 12V, TA = 25°C",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Turn-on resistor (integrated MOSFET)",
"symbol": "Rdson",
"kind": "electrical",
"unit": "",
"min": null,
"typ": 12,
"max": null,
"conditions": "VIN = 12V, TA = 25°C",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Thermal shutdown temperature",
"symbol": "TSD",
"kind": "thermal",
"unit": "C",
"min": null,
"typ": 150,
"max": null,
"conditions": "",
"source_page": 4,
"source": "datasheet"
}
]
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"sy50281aac"
],
"discovery_pitch": "SY50281AAC (Silergy Corp) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray",
"email": "[email protected]"
},
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"sy50281aac.kicad_sym",
"sy50281aac.kicad_mod",
"sy50281aac.glb",
"sy50281aac.step",
"sy50281aac.lbr",
"docs/hero.png",
"docs/sy50281aac-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"sy50281aac-hero.glb",
"sy50281aac-hero.overlay.json",
"sy50281aac-etched.glb"
],
"visibility": {
"public": true
}
}