component
LM317BT
Public Made by Adomby adom
STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-220-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453
{
"schema_version": 1,
"type": "component",
"slug": "lm317bt",
"title": "LM317BT",
"brief": "STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-220-3. 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)",
"lm317bt",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "LM317BT",
"manufacturer": "STMicroelectronics",
"package": "TO-220-3",
"pin_count": 3,
"category": "Power Management (PMIC)",
"subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
"datasheet": "https://www.st.com/resource/en/datasheet/lm317bt.pdf",
"parts": {
"symbol": "lm317bt.kicad_sym",
"footprint": "lm317bt.kicad_mod",
"model_3d": "lm317bt-hero.glb",
"model_3d_plain": "lm317bt-etched.glb",
"model_3d_step": "lm317bt-etched.step",
"model_3d_step_plain": "lm317bt.step",
"lbr": "lm317bt.lbr"
},
"distributor_links": {
"lcsc": "C2969918",
"digikey": "LM317BTOS-ND",
"mouser": "511-LM317BT"
},
"distributor_check": {
"checked_at": "2026-11-02T17:34:42Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "LM317BTOS-ND",
"status": "found"
},
"mouser": {
"pn": "511-LM317BT",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "ADJUST",
"type": "input",
"description": "Adjustment terminal sets the output voltage through the external resistor divider, with adjustment pin current IADJ of 100 µA max."
},
{
"number": "2",
"name": "OUTPUT",
"type": "output",
"description": "Regulated output delivers more than 1.5 A of load current, with IO(max) of 1.5 A minimum over the specified conditions."
},
{
"number": "3",
"name": "INPUT",
"type": "power_in",
"description": "Unregulated input supply; the input-to-output differential voltage must not exceed the 40 V absolute maximum."
}
],
"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: Device summary (Table 6) lists LM317BT in the TO-220 column but the column split is ambiguous in the; Pin 1 and pin 3 are referenced as the VREF terminals (between pin 3 and pin 1, Table 4/5), which con"
],
"pages_sent": 34,
"cost_usd": 0.0356,
"at": "2026-11-02T17:34:32"
},
"datasheet": {
"url": "https://www.st.com/resource/en/datasheet/lm317bt.pdf",
"pages": 34,
"sha256": "22e0a613ceff898c",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 3,
"described": 3,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "lm317bt.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "body on z = 0, through-hole leads below",
"extents_mm": [
10.25,
4.455,
28.525
],
"zmin_mm": -9.75,
"centre_offset_mm": 0.932,
"footprint_binding": "identity",
"sha256": "7cb065d935df5771f0ba6e48ddd180863a121af76483dad7f18e667a7b68204a",
"checked": "2026-11-02",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "lm317bt-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "body on z = 0, through-hole leads below",
"extents_mm": [
10.25,
4.455,
28.525
],
"zmin_mm": -9.75,
"centre_offset_mm": 0.932,
"footprint_binding": "identity",
"sha256": "58a58a062ab84a11c0ff0e467f87f7deec4c7eb75cdd80d7d683ef2b3eb19163",
"checked": "2026-11-02",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "STMicroelectronics",
"Package": "TO-220-3",
"Category": "Power Management (PMIC)",
"Pins": "3"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "22e0a613ceff898cfa5683c47d7f017fe11d1c720ad3483cada432a45f347b3a",
"rows": [
{
"name": "Line regulation",
"symbol": "ΔVO",
"kind": "electrical",
"unit": "%/V",
"min": null,
"typ": 0.01,
"max": 0.04,
"conditions": "VI - VO = 3 to 40 V, TJ = 25°C",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Line regulation",
"symbol": "ΔVO",
"kind": "electrical",
"unit": "%/V",
"min": null,
"typ": 0.02,
"max": 0.07,
"conditions": "VI - VO = 3 to 40 V",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Load regulation",
"symbol": "ΔVO",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": 5,
"max": 25,
"conditions": "VO ≤ 5 V, IO = 10 mA to IMAX, TJ = 25°C",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Load regulation",
"symbol": "ΔVO",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": 20,
"max": 70,
"conditions": "VO ≤ 5 V, IO = 10 mA to IMAX",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Load regulation",
"symbol": "ΔVO",
"kind": "electrical",
"unit": "%",
"min": null,
"typ": 0.1,
"max": 0.5,
"conditions": "VO ≥ 5 V, IO = 10 mA to IMAX, TJ = 25°C",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Load regulation",
"symbol": "ΔVO",
"kind": "electrical",
"unit": "%",
"min": null,
"typ": 0.3,
"max": 1.5,
"conditions": "VO ≥ 5 V, IO = 10 mA to IMAX",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Adjustment pin current",
"symbol": "IADJ",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 50,
"max": 100,
"conditions": "",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Adjustment pin current change",
"symbol": "ΔIADJ",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 0.2,
"max": 5,
"conditions": "VI - VO = 2.5 to 40 V, IO = 10 mA to 500 mA",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Reference voltage",
"symbol": "VREF",
"kind": "electrical",
"unit": "V",
"min": 1.2,
"typ": 1.25,
"max": 1.3,
"conditions": "VI - VO = 2.5 to 40 V, IO = 10 mA to 500 mA, PD ≤ PMAX",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Output voltage temperature stability",
"symbol": "ΔVO/VO",
"kind": "electrical",
"unit": "%",
"min": null,
"typ": 1,
"max": null,
"conditions": "",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Minimum load current",
"symbol": "IO(min)",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 3.5,
"max": 10,
"conditions": "VI - VO = 40 V",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Maximum load current",
"symbol": "IO(max)",
"kind": "electrical",
"unit": "A",
"min": 1.5,
"typ": 2.2,
"max": null,
"conditions": "VI - VO ≤ 15 V, PD < PMAX",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Maximum load current",
"symbol": "IO(max)",
"kind": "electrical",
"unit": "A",
"min": null,
"typ": 0.4,
"max": null,
"conditions": "VI - VO = 40 V, PD < PMAX, TJ = 25°C",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Output noise voltage (percentage of VO)",
"symbol": "eN",
"kind": "electrical",
"unit": "%",
"min": null,
"typ": 0.003,
"max": null,
"conditions": "B = 10 Hz to 100 kHz, TJ = 25°C",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Supply voltage rejection",
"symbol": "SVR",
"kind": "electrical",
"unit": "dB",
"min": null,
"typ": 65,
"max": null,
"conditions": "TJ = 25°C, f = 120 Hz, CADJ = 0",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Supply voltage rejection",
"symbol": "SVR",
"kind": "electrical",
"unit": "dB",
"min": 66,
"typ": 80,
"max": null,
"conditions": "TJ = 25°C, f = 120 Hz, CADJ = 10 µF",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Operating junction temperature",
"symbol": "TOP",
"kind": "recommended_operating",
"unit": "°C",
"min": -40,
"typ": null,
"max": 125,
"conditions": "LM317B",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Input-reference differential voltage",
"symbol": "VI - VO",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 40,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Storage temperature",
"symbol": "TSTG",
"kind": "absolute_maximum",
"unit": "°C",
"min": -65,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Thermal resistance junction-ambient",
"symbol": "RthJA",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": 50,
"max": null,
"conditions": "TO-220 package",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Thermal resistance junction-case",
"symbol": "RthJC",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": 5,
"max": null,
"conditions": "TO-220 package",
"source_page": 3,
"source": "datasheet"
}
]
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"lm317bt"
],
"discovery_pitch": "LM317BT (STMicroelectronics) 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",
"lm317bt.kicad_sym",
"lm317bt.kicad_mod",
"lm317bt.glb",
"lm317bt.step",
"lm317bt.lbr",
"docs/hero.png",
"docs/lm317bt-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"lm317bt-hero.glb",
"lm317bt-hero.overlay.json",
"lm317bt-etched.glb"
],
"visibility": {
"public": true
}
}