component
CJ7812B-TBN-ATG
Public Made by Adomby adom
Changjing Linear Voltage Regulators (LDO), TO-220-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509
{
"schema_version": 1,
"type": "component",
"slug": "cj7812b-tbn-atg",
"title": "CJ7812B-TBN-ATG",
"brief": "Changjing Linear Voltage Regulators (LDO), TO-220-3L. 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",
"cj7812b-tbn-atg",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "CJ7812B-TBN-ATG",
"manufacturer": "Changjing",
"package": "TO-220-3L",
"pin_count": 3,
"category": "Power Management",
"subcategory": "Linear Voltage Regulators (LDO)",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/a3ac5429cbccaeace7fe94b7695fb76e.pdf",
"parts": {
"symbol": "cj7812b-tbn-atg.kicad_sym",
"footprint": "cj7812b-tbn-atg.kicad_mod",
"model_3d": "cj7812b-tbn-atg-hero.glb",
"model_3d_plain": "cj7812b-tbn-atg-etched.glb",
"model_3d_step": "cj7812b-tbn-atg-etched.step",
"model_3d_step_plain": "cj7812b-tbn-atg.step",
"lbr": "cj7812b-tbn-atg.lbr"
},
"distributor_links": {
"lcsc": "C20622081"
},
"distributor_check": {
"checked_at": "2026-10-22T21:41:46Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "quota"
},
"mouser": {
"pn": null,
"status": "quota"
}
},
"pins": [
{
"number": "1",
"name": "IN",
"type": "power_in",
"description": "Input of the device; recommended input voltage for CJ7812B is up to 32V (absolute maximum 36V)."
},
{
"number": "2",
"name": "GND",
"type": "power_in",
"description": "Regulator ground."
},
{
"number": "3",
"name": "OUT",
"type": "power_out",
"description": "Regulated output of the device, fixed 12V for CJ7812B with output current up to 1A."
}
],
"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": [],
"pages_sent": 9,
"cost_usd": 0.0502,
"at": "2026-10-22T21:41:34"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/a3ac5429cbccaeace7fe94b7695fb76e.pdf",
"pages": 33,
"sha256": "2bf7e0142c58a2c8",
"source_tier": "lcsc"
},
"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": "cj7812b-tbn-atg.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": "2026-10-22",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "cj7812b-tbn-atg-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": "82c30e95865a5165e37c94028230a7483c3711ab50f7b8b43ed65699197631e1",
"checked": "2026-10-22",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Changjing",
"Package": "TO-220-3L",
"Category": "Power Management",
"Pins": "3"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "2bf7e0142c58a2c88a01a5d74c1c901610d4be43d3b1c51c9f7df243e6a27d8b",
"rows": [
{
"name": "Output voltage (±2% grade)",
"symbol": "VOUT",
"kind": "electrical",
"unit": "V",
"min": 11.75,
"typ": 12,
"max": 12.25,
"conditions": "TJ = 25°C, VIN = 19V, IOUT = 500mA",
"source_page": 14,
"source": "datasheet"
},
{
"name": "Output voltage over temperature",
"symbol": "VOUT",
"kind": "electrical",
"unit": "V",
"min": 11.5,
"typ": 12,
"max": 12.5,
"conditions": "IOUT = 5mA to 1A, VIN = 14.8 to 27V, TJ = -40 to 125°C, PD ≤ 15W",
"source_page": 14,
"source": "datasheet"
},
{
"name": "Line regulation",
"symbol": "ΔVRLINE",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": 25,
"max": 120,
"conditions": "VIN = 14.8 to 27V, IOUT = 500mA",
"source_page": 14,
"source": "datasheet"
},
{
"name": "Load regulation",
"symbol": "ΔVRLOAD",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": 40,
"max": 120,
"conditions": "VIN = 19V, IOUT = 5mA to 1A",
"source_page": 14,
"source": "datasheet"
},
{
"name": "Quiescent current",
"symbol": "IQ",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 3.4,
"max": 6,
"conditions": "VIN = 19V, TJ = -40 to 125°C, IOUT = 0mA",
"source_page": 14,
"source": "datasheet"
},
{
"name": "Quiescent current change (load)",
"symbol": "ΔIQ",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 0.1,
"max": 0.8,
"conditions": "VIN = 19V, IOUT = 5mA to 1A",
"source_page": 14,
"source": "datasheet"
},
{
"name": "Quiescent current change (line)",
"symbol": "ΔIQ",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 0.3,
"max": 0.8,
"conditions": "VIN = 14.8 to 30V, IOUT = 500mA",
"source_page": 14,
"source": "datasheet"
},
{
"name": "Maximum input voltage",
"symbol": "VIN MAX",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 36,
"conditions": "",
"source_page": 8,
"source": "datasheet"
},
{
"name": "Maximum output current",
"symbol": "IOUT MAX",
"kind": "absolute_maximum",
"unit": "A",
"min": null,
"typ": null,
"max": 1,
"conditions": "",
"source_page": 8,
"source": "datasheet"
},
{
"name": "Maximum junction temperature",
"symbol": "TJ Max",
"kind": "absolute_maximum",
"unit": "°C",
"min": null,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 8,
"source": "datasheet"
},
{
"name": "Storage temperature",
"symbol": "Tstg",
"kind": "absolute_maximum",
"unit": "°C",
"min": -65,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 8,
"source": "datasheet"
},
{
"name": "Input voltage range (CJ7812B)",
"symbol": "VIN",
"kind": "recommended_operating",
"unit": "V",
"min": null,
"typ": null,
"max": 32,
"conditions": "",
"source_page": 8,
"source": "datasheet"
},
{
"name": "Operating junction temperature",
"symbol": "TJ",
"kind": "recommended_operating",
"unit": "°C",
"min": -40,
"typ": null,
"max": 125,
"conditions": "",
"source_page": 8,
"source": "datasheet"
},
{
"name": "ESD human body model",
"symbol": "VESD-HBM",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 6000,
"conditions": "",
"source_page": 9,
"source": "datasheet"
},
{
"name": "ESD machine model",
"symbol": "VESD-MM",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 500,
"conditions": "",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Junction-to-ambient thermal resistance TO-220-3L",
"symbol": "RΘJA",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": 65.1,
"max": null,
"conditions": "TA = 25°C, typical, soldered on PCB in still air",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Junction-to-case thermal resistance TO-220-3L",
"symbol": "RΘJC",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": 5.4,
"max": null,
"conditions": "TA = 25°C, typical",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Reference max power dissipation TO-220-3L",
"symbol": "PD Ref",
"kind": "thermal",
"unit": "W",
"min": null,
"typ": 1.53,
"max": null,
"conditions": "continuous operation, TA = 25°C",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Output voltage temperature coefficient",
"symbol": "ΔVOUT / ΔT",
"kind": "temperature_coefficient",
"unit": "mV/°C",
"min": null,
"typ": 0.96,
"max": null,
"conditions": "",
"source_page": 14,
"source": "datasheet"
},
{
"name": "Output voltage temperature coefficient (relative)",
"symbol": "ΔVOUT / (VOUT × ΔT)",
"kind": "temperature_coefficient",
"unit": "ppm/°C",
"min": null,
"typ": 80,
"max": null,
"conditions": "",
"source_page": 14,
"source": "datasheet"
},
{
"name": "Output noise voltage",
"symbol": "VN",
"kind": "electrical",
"unit": "μV / VO",
"min": null,
"typ": 10,
"max": null,
"conditions": "f = 10 to 100k Hz, TA = 25°C",
"source_page": 14,
"source": "datasheet"
},
{
"name": "Ripple rejection",
"symbol": "RR",
"kind": "electrical",
"unit": "dB",
"min": null,
"typ": 60,
"max": null,
"conditions": "f = 120Hz, VIN = 15 to 25V, IOUT = 500mA",
"source_page": 14,
"source": "datasheet"
},
{
"name": "Dropout voltage",
"symbol": "VD",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 2,
"max": null,
"conditions": "IOUT = 1A",
"source_page": 14,
"source": "datasheet"
},
{
"name": "Output resistance",
"symbol": "ROUT",
"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": 11,
"max": null,
"conditions": "f = 1kHz",
"source_page": 14,
"source": "datasheet"
},
{
"name": "Short circuit current",
"symbol": "ISC",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 200,
"max": null,
"conditions": "VIN = 35V, TA = 25°C",
"source_page": 14,
"source": "datasheet"
},
{
"name": "Peak current",
"symbol": "IPK",
"kind": "electrical",
"unit": "A",
"min": null,
"typ": 2.2,
"max": null,
"conditions": "VIN = 18V",
"source_page": 14,
"source": "datasheet"
}
]
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"cj7812b-tbn-atg"
],
"discovery_pitch": "CJ7812B-TBN-ATG (Changjing) 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",
"cj7812b-tbn-atg.kicad_sym",
"cj7812b-tbn-atg.kicad_mod",
"cj7812b-tbn-atg.glb",
"cj7812b-tbn-atg.step",
"cj7812b-tbn-atg.lbr",
"docs/hero.png",
"docs/cj7812b-tbn-atg-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"cj7812b-tbn-atg-hero.glb",
"cj7812b-tbn-atg-hero.overlay.json",
"cj7812b-tbn-atg-etched.glb"
],
"visibility": {
"public": true
}
}