component
RT9187CGB
Public Made by Adomby adom
Richtek Tech Linear Voltage Regulators (LDO), SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522
{
"schema_version": 1,
"type": "component",
"slug": "rt9187cgb",
"title": "RT9187CGB",
"brief": "Richtek Tech Linear Voltage Regulators (LDO), 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",
"rt9187cgb",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "RT9187CGB",
"manufacturer": "Richtek Tech",
"package": "SOT-23-5",
"pin_count": 5,
"category": "Power Supply Chip",
"subcategory": "Linear Voltage Regulators (LDO)",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/65ce580f1ae3a2cd4d8c1c1bff9a34db.pdf",
"parts": {
"symbol": "rt9187cgb.kicad_sym",
"footprint": "rt9187cgb.kicad_mod",
"model_3d": "rt9187cgb-hero.glb",
"model_3d_plain": "rt9187cgb-etched.glb",
"model_3d_step": "rt9187cgb-etched.step",
"model_3d_step_plain": "rt9187cgb.step",
"lbr": "rt9187cgb.lbr"
},
"distributor_links": {
"lcsc": "C2997942",
"digikey": "1028-1226-2-ND"
},
"distributor_check": {
"checked_at": "2026-10-27T00:26:15Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "1028-1226-2-ND",
"status": "found"
},
"mouser": {
"pn": null,
"status": "no match"
}
},
"pins": [
{
"number": "1",
"name": "VIN",
"type": "power_in",
"description": "Voltage input with a recommended supply range of 2.5V to 5.5V and a 6V absolute maximum."
},
{
"number": "2",
"name": "GND",
"type": "power_in",
"description": "Ground reference pin for the regulator."
},
{
"number": "3",
"name": "EN",
"type": "input",
"description": "Active-high chip enable; a logic-low below 0.6V puts the part into shutdown with standby current of 1µA maximum."
},
{
"number": "4",
"name": "ADJ",
"type": "input",
"description": "Output voltage feedback input, where VOUT = VREF x (1 + R1/R2) with VREF typically 0.8V and divider resistors up to 100kΩ."
},
{
"number": "5",
"name": "VOUT",
"type": "power_out",
"description": "Regulated voltage output that requires at least a 2.2µF output capacitor for stability."
}
],
"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": null,
"consensus": "skipped (clean text read)",
"guards": "pin_guards 0.1: passed",
"guard_notes": [],
"pages_sent": 8,
"cost_usd": 0.0005,
"at": "2026-10-27T00:25:58"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/65ce580f1ae3a2cd4d8c1c1bff9a34db.pdf",
"pages": 8,
"sha256": "af18f1df3e172e01",
"source_tier": "mfr"
},
"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": "rt9187cgb.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": "2026-10-27",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "rt9187cgb-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": "467271a025fb233cf552f8bf91817bf89365686a0bd1d666b4353385cd4febcf",
"checked": "2026-10-27",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Richtek Tech",
"Package": "SOT-23-5",
"Category": "Power Supply Chip",
"Pins": "5"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "af18f1df3e172e018969de266315abcadab1a8367109e7fcf5a649c9eff8c20c",
"rows": [
{
"name": "Reference Voltage Tolerance",
"symbol": "VREF",
"kind": "electrical",
"unit": "V",
"min": 0.784,
"typ": 0.8,
"max": 0.816,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "ADJ Pin Current",
"symbol": "IADJ",
"kind": "electrical",
"unit": "nA",
"min": null,
"typ": 10,
"max": 100,
"conditions": "VADJ = VREF",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Quiescent Current",
"symbol": "IQ",
"kind": "electrical",
"unit": "μA",
"min": null,
"typ": 300,
"max": 400,
"conditions": "VEN ≥ VIH, IOUT = 0mA",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Standby Current",
"symbol": "ISTBY",
"kind": "electrical",
"unit": "μA",
"min": null,
"typ": 0.1,
"max": 1,
"conditions": "VEN ≤ VIL,VIN = 3.3V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Current Limit",
"symbol": "ILIM",
"kind": "electrical",
"unit": "A",
"min": 0.9,
"typ": null,
"max": null,
"conditions": "RLOAD = 0.5Ω, VIN = 3.3V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Dropout Voltage",
"symbol": "VDROP",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": 60,
"max": 100,
"conditions": "IOUT = 0.3A, VOUT = 5V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Dropout Voltage",
"symbol": "VDROP",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": 100,
"max": 200,
"conditions": "IOUT = 0.5A, VOUT = 5V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Load Regulation",
"symbol": "ΔVLOAD",
"kind": "electrical",
"unit": "%/A",
"min": null,
"typ": 0.4,
"max": null,
"conditions": "VIN = (VOUT + 0.5V), 10mA < IOUT < 0.5A",
"source_page": 3,
"source": "datasheet"
},
{
"name": "EN Threshold Logic-High Voltage",
"symbol": "VIH",
"kind": "electrical",
"unit": "V",
"min": 1.8,
"typ": null,
"max": null,
"conditions": "VIN = 3.3V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "EN Threshold Logic-Low Voltage",
"symbol": "VIL",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.6,
"conditions": "VIN = 3.3V",
"source_page": 3,
"source": "datasheet"
},
{
"name": "EN Current",
"symbol": "IEN",
"kind": "electrical",
"unit": "μA",
"min": null,
"typ": 0.1,
"max": 1,
"conditions": "VIN = 3.3V, Enable",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Power Supply Rejection Rate",
"symbol": "PSRR",
"kind": "electrical",
"unit": "dB",
"min": null,
"typ": -60,
"max": null,
"conditions": "f = 100Hz",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Power Supply Rejection Rate",
"symbol": "PSRR",
"kind": "electrical",
"unit": "dB",
"min": null,
"typ": -50,
"max": null,
"conditions": "f = 10kHz",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Line Regulation",
"symbol": "ΔVLINE",
"kind": "electrical",
"unit": "%",
"min": null,
"typ": null,
"max": 0.3,
"conditions": "VIN = (VOUT + 0.5) to 5.5V, IOUT = 1mA",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Supply Input Voltage (absolute maximum)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 6,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "EN Input Voltage (absolute maximum)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 6,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Power Dissipation",
"symbol": "PD",
"kind": "absolute_maximum",
"unit": "W",
"min": null,
"typ": null,
"max": 0.4,
"conditions": "TA = 25°C, SOT-23-5",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Package Thermal Resistance",
"symbol": "θJA",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": 250,
"max": null,
"conditions": "SOT-23-5",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Lead Temperature (Soldering, 10 sec.)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "°C",
"min": null,
"typ": null,
"max": 260,
"conditions": "Soldering, 10 sec.",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Junction Temperature",
"symbol": "",
"kind": "absolute_maximum",
"unit": "°C",
"min": null,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Storage Temperature Range",
"symbol": "",
"kind": "absolute_maximum",
"unit": "°C",
"min": -65,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "ESD Susceptibility HBM",
"symbol": "",
"kind": "absolute_maximum",
"unit": "kV",
"min": null,
"typ": null,
"max": 2,
"conditions": "HBM (Human Body Model)",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Supply Input Voltage (recommended)",
"symbol": "",
"kind": "recommended_operating",
"unit": "V",
"min": 2.5,
"typ": null,
"max": 5.5,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "EN Input Voltage (recommended)",
"symbol": "",
"kind": "recommended_operating",
"unit": "V",
"min": 0,
"typ": null,
"max": 5.5,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Junction Temperature Range",
"symbol": "",
"kind": "recommended_operating",
"unit": "°C",
"min": -40,
"typ": null,
"max": 125,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Ambient Temperature Range",
"symbol": "",
"kind": "recommended_operating",
"unit": "°C",
"min": -40,
"typ": null,
"max": 85,
"conditions": "",
"source_page": 3,
"source": "datasheet"
}
]
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"rt9187cgb"
],
"discovery_pitch": "RT9187CGB (Richtek Tech) 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",
"rt9187cgb.kicad_sym",
"rt9187cgb.kicad_mod",
"rt9187cgb.glb",
"rt9187cgb.step",
"rt9187cgb.lbr",
"docs/hero.png",
"docs/rt9187cgb-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"rt9187cgb-hero.glb",
"rt9187cgb-hero.overlay.json",
"rt9187cgb-etched.glb"
],
"visibility": {
"public": true
}
}