component
TMI3181A
Public Made by Adomby adom
TMI DC-DC Converters, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631
{
"schema_version": 1,
"type": "component",
"slug": "tmi3181a",
"title": "TMI3181A",
"brief": "TMI DC-DC Converters, 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 supply chip",
"tmi3181a",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "TMI3181A",
"manufacturer": "TMI",
"package": "SOT-23-5",
"pin_count": 5,
"category": "Power Supply Chip",
"subcategory": "DC-DC Converters",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/a10f740421a5b6596138c76d9a4acec9.pdf",
"parts": {
"symbol": "tmi3181a.kicad_sym",
"footprint": "tmi3181a.kicad_mod",
"model_3d": "tmi3181a-hero.glb",
"model_3d_plain": "tmi3181a-etched.glb",
"model_3d_step": "tmi3181a-etched.step",
"model_3d_step_plain": "tmi3181a.step",
"lbr": "tmi3181a.lbr"
},
"distributor_links": {
"lcsc": "C5259197"
},
"distributor_check": {
"checked_at": "2026-10-22T15:28:56Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "no match"
},
"mouser": {
"pn": null,
"status": "no match"
}
},
"pins": [
{
"number": "1",
"name": "EN",
"type": "input",
"description": "Chip enable: drive above the EN high threshold to turn the part on and below the EN low threshold to turn it off; do not leave floating."
},
{
"number": "2",
"name": "GND",
"type": "power_in",
"description": "Ground pin."
},
{
"number": "3",
"name": "LX",
"type": "passive",
"description": "Power switch output, the switch node connection to the inductor."
},
{
"number": "4",
"name": "VIN",
"type": "power_in",
"description": "Power supply input (2.5V to 6.5V), must be closely decoupled to GND with a 10µF or greater ceramic capacitor."
},
{
"number": "5",
"name": "FB",
"type": "input",
"description": "Output voltage feedback pin, regulated to 0.6V reference through an external resistor divider."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"extractor": "extract_pins 0.3",
"primary_model": "claude-sonnet-5-5",
"primary_mode": "text",
"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: LX pin type chosen as passive (switch node, power output to inductor); datasheet does not give an ER"
],
"pages_sent": 18,
"cost_usd": 0.1025,
"at": "2026-10-22T15:24:47"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/a10f740421a5b6596138c76d9a4acec9.pdf",
"pages": 18,
"sha256": "8d8fc69e9a9aefac",
"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": "tmi3181a.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": "2026-10-22",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "tmi3181a-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": "fc6c6cb443f9d8cebb98f1bdf7a26bb67a3ad5fe840323a2dc36d509a968ee30",
"checked": "2026-10-22",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "TMI",
"Package": "SOT-23-5",
"Category": "Power Supply Chip",
"Pins": "5"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "8d8fc69e9a9aefac1e1051f702477e7666b091296d3d3a3deb1474b20ccc20b1",
"rows": [
{
"name": "Input Voltage Range",
"symbol": "VIN",
"kind": "electrical",
"unit": "V",
"min": 2.5,
"typ": null,
"max": 6.5,
"conditions": "VIN=5V, VOUT=1.2V, TA=25°C",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Quiescent Current",
"symbol": "IQ",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 3,
"max": 8,
"conditions": "VEN=2.0V, VFB=VREFx105%",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Shutdown Current",
"symbol": "",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 0.01,
"max": 0.1,
"conditions": "VEN=0V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Regulated Feedback Voltage",
"symbol": "VFB",
"kind": "electrical",
"unit": "V",
"min": 0.588,
"typ": 0.6,
"max": 0.612,
"conditions": "TA = 25°C",
"source_page": 4,
"source": "datasheet"
},
{
"name": "EN Rising Threshold Voltage",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": 0.6,
"typ": 0.9,
"max": 1.2,
"conditions": "VIN=5V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "EN Leakage Current",
"symbol": "",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 0.01,
"max": 0.5,
"conditions": "",
"source_page": 4,
"source": "datasheet"
},
{
"name": "LX Leakage Current",
"symbol": "",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 0.01,
"max": 1,
"conditions": "VEN=0V, VIN=VLX=5V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "OVP Threshold",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 7,
"max": null,
"conditions": "",
"source_page": 4,
"source": "datasheet"
},
{
"name": "OVP Hysteresis",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 0.24,
"max": null,
"conditions": "",
"source_page": 4,
"source": "datasheet"
},
{
"name": "UVLO Threshold",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 2.38,
"max": null,
"conditions": "",
"source_page": 4,
"source": "datasheet"
},
{
"name": "UVLO Hysteresis",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 0.28,
"max": null,
"conditions": "",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Oscillation Frequency",
"symbol": "",
"kind": "electrical",
"unit": "MHz",
"min": null,
"typ": 1.2,
"max": null,
"conditions": "VFB=100% x VREF",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Oscillation Frequency (short)",
"symbol": "",
"kind": "electrical",
"unit": "kHz",
"min": null,
"typ": 400,
"max": null,
"conditions": "VFB=0V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "On Resistance of PMOS",
"symbol": "",
"kind": "electrical",
"unit": "Ω",
"min": null,
"typ": 0.3,
"max": null,
"conditions": "ILX=100mA",
"source_page": 4,
"source": "datasheet"
},
{
"name": "On Resistance of NMOS",
"symbol": "",
"kind": "electrical",
"unit": "Ω",
"min": null,
"typ": 0.15,
"max": null,
"conditions": "ILX=-100mA",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Peak Current Limit",
"symbol": "",
"kind": "electrical",
"unit": "A",
"min": null,
"typ": 1.5,
"max": null,
"conditions": "normal operation",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Peak Current Limit",
"symbol": "",
"kind": "electrical",
"unit": "A",
"min": null,
"typ": 1.2,
"max": null,
"conditions": "Hiccup mode",
"source_page": 4,
"source": "datasheet"
},
{
"name": "EN Hysteresis",
"symbol": "",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 0.12,
"max": null,
"conditions": "",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Soft Start Time",
"symbol": "",
"kind": "timing",
"unit": "µs",
"min": null,
"typ": 270,
"max": null,
"conditions": "10% VOUT to 90% VOUT",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Discharge Resistance on LX pin",
"symbol": "",
"kind": "electrical",
"unit": "Ω",
"min": null,
"typ": 200,
"max": null,
"conditions": "VEN=0V, VLX=0.1V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Thermal Shutdown Threshold",
"symbol": "",
"kind": "thermal",
"unit": "°C",
"min": null,
"typ": 160,
"max": null,
"conditions": "Note 4: guaranteed by design",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Thermal Shutdown Hysteresis",
"symbol": "",
"kind": "thermal",
"unit": "°C",
"min": null,
"typ": 25,
"max": null,
"conditions": "Note 4: guaranteed by design",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Input Supply Voltages",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": 7,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "EN, LX Voltages",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": 7,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "LX Voltage (<10ns transient)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -3,
"typ": null,
"max": 7.5,
"conditions": "<10ns transient",
"source_page": 2,
"source": "datasheet"
},
{
"name": "LX Voltage (<5ns transient)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -4,
"typ": null,
"max": 8,
"conditions": "<5ns transient",
"source_page": 2,
"source": "datasheet"
},
{
"name": "PG, FB Voltage",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": 6,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Storage Temperature Range",
"symbol": "",
"kind": "absolute_maximum",
"unit": "°C",
"min": -65,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Junction Temperature",
"symbol": "TJ",
"kind": "absolute_maximum",
"unit": "°C",
"min": -40,
"typ": null,
"max": 150,
"conditions": "Note 2",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Power Dissipation",
"symbol": "PD",
"kind": "absolute_maximum",
"unit": "mW",
"min": null,
"typ": null,
"max": 600,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Lead Temperature Soldering",
"symbol": "",
"kind": "absolute_maximum",
"unit": "°C",
"min": null,
"typ": null,
"max": 260,
"conditions": "10sec",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Voltage Range VIN",
"symbol": "VIN",
"kind": "recommended_operating",
"unit": "V",
"min": 2.5,
"typ": null,
"max": 6.5,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Operating Junction Temperature Range",
"symbol": "TJ",
"kind": "recommended_operating",
"unit": "°C",
"min": -40,
"typ": null,
"max": 125,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Junction-to-ambient thermal resistance",
"symbol": "θJA",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": 200,
"max": null,
"conditions": "Measured on JESD51-7, 4-layer PCB",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Junction-to-case thermal resistance",
"symbol": "θJC",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": 65,
"max": null,
"conditions": "Measured on JESD51-7, 4-layer PCB",
"source_page": 3,
"source": "datasheet"
}
]
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"tmi3181a"
],
"discovery_pitch": "TMI3181A (TMI) 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",
"tmi3181a.kicad_sym",
"tmi3181a.kicad_mod",
"tmi3181a.glb",
"tmi3181a.step",
"tmi3181a.lbr",
"docs/hero.png",
"docs/tmi3181a-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"tmi3181a-hero.glb",
"tmi3181a-hero.overlay.json",
"tmi3181a-etched.glb"
],
"visibility": {
"public": true
}
}