component
LD3985M33R
Public Made by Adomby adom
STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5L. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
main
Ray
Publish 0.2.1
c441a4d
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193
{
"slug": "ld3985m33r",
"version": "0.2.1",
"type": "component",
"description": "STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5L. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
"tags": [
"component",
"pmic",
"ld3985m33r"
],
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"ld3985m33r.kicad_sym",
"ld3985m33r.kicad_mod",
"ld3985m33r.glb",
"ld3985m33r.step",
"ld3985m33r-etched.step",
"ld3985m33r.lbr",
"docs/hero.png",
"docs/ld3985m33r-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"pads.json",
"ld3985m33r-etched.glb",
"ld3985m33r-hero.glb",
"ld3985m33r-hero.overlay.json"
],
"metadata": {
"specs": {
"Manufacturer": "STMicroelectronics",
"Package": "SOT-23-5L",
"Category": "PMIC",
"Pins": "5"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"rows": [
{
"name": "Input voltage",
"symbol": "VIN",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": 6,
"conditions": "DC input voltage",
"source_page": 6,
"source": "datasheet"
}
]
}
},
"component": {
"mpn": "LD3985M33R",
"manufacturer": "STMicroelectronics",
"package": "SOT-23-5L",
"pin_count": 5,
"category": "PMIC",
"subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
"datasheet": "https://www.st.com/resource/en/datasheet/ld3985m33r.pdf",
"parts": {
"symbol": "ld3985m33r.kicad_sym",
"footprint": "ld3985m33r.kicad_mod",
"model_3d": "ld3985m33r-hero.glb",
"model_3d_plain": "ld3985m33r.glb",
"model_3d_step": "ld3985m33r-etched.step",
"model_3d_step_plain": "ld3985m33r.step",
"lbr": "ld3985m33r.lbr"
},
"distributor_links": {
"digikey": "497-3504-2-ND",
"mouser": "511-LD3985M33R",
"lcsc": "C46243"
},
"pins": [
{
"number": "1",
"name": "VI",
"type": "power_in",
"description": "Input voltage of the LDO. Operating range 2.5 V to 6 V (absolute max -0.3 to 6 V; withstands 6.5 V non-repetitive spike for 200 ms). Decouple with 1 µF ceramic capacitor to GND."
},
{
"number": "2",
"name": "GND",
"type": "power_in",
"description": "Common ground reference for the regulator."
},
{
"number": "3",
"name": "VINH",
"type": "input",
"description": "Inhibit (enable) input. ON mode when VINH >= 1.2 V, OFF mode when VINH <= 0.4 V. Absolute max -0.3 V to VI+0.3 V. Input leakage ±1 nA typ. Must not be left floating (no internal pull-up/pull-down)."
},
{
"number": "4",
"name": "BYPASS",
"type": "passive",
"description": "Reference bypass pin. Connect an external capacitor (typically 10 nF) to GND to filter internal reference noise and minimize output noise voltage (30 µVRMS over 10 Hz-100 kHz)."
},
{
"number": "5",
"name": "VO",
"type": "power_out",
"description": "Regulated output voltage of the LDO (3.3 V nominal for the M33 option). Delivers up to 150 mA guaranteed (300 mA min peak, 550 mA typ). Requires a low-ESR ceramic output capacitor (Co >= 1 µF, ESR 5 mΩ-5 Ω)."
}
],
"provenance": {
"extractor": "ds2sf",
"datasheet": {
"url": "https://www.st.com/resource/en/datasheet/ld3985m33r.pdf",
"pages": 22,
"sha256": "c78962c126412ffb",
"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"
},
"pin1": {
"pad": "1",
"at": [
-1.1375,
-0.95
],
"corner": "top-left",
"source": "silk-marker",
"derived_from": "SOT-23-5@sha256:455a3f7c3e5eb5b8",
"mark": "drawn"
},
"models_3d": [
{
"file": "ld3985m33r.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": "2026-10-07",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "ld3985m33r-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": "42faf643ce1de193ec0dccfc492ec5de6dce75e0adc0999773da91c39648a055",
"checked": "2026-10-07",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"title": "LD3985M33R",
"brief": "STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5L. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
"discovery_triggers": [
"ld3985m33r"
],
"discovery_pitch": "LD3985M33R (STMicroelectronics) component page with datasheet-verified CAD.",
"visibility": "public"
}