LP2985

{
  "schema_version": 1,
  "type": "component",
  "slug": "lp2985",
  "title": "LP2985",
  "brief": "TI 150 mA low-noise LDO, SOT-23-5. Fixed 3.3 V, enable, bypass pin for low noise. For RF/analog. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "voltage-regulator",
    "ldo",
    "low-noise",
    "3v3",
    "sot-23-5",
    "texas-instruments"
  ],
  "component": {
    "mpn": "LP2985",
    "manufacturer": "Texas Instruments",
    "package": "SOT-23-5",
    "pin_count": 5,
    "category": "Power Management",
    "subcategory": "150 mA low-noise LDO",
    "datasheet": "https://www.ti.com/lit/ds/symlink/lp2985.pdf",
    "parts": {
      "symbol": "lp2985.kicad_sym",
      "footprint": "lp2985.kicad_mod",
      "model_3d": "lp2985-etched.glb",
      "model_3d_plain": "lp2985.glb",
      "lbr": "lp2985.lbr",
      "model_3d_step": "lp2985-etched.step",
      "model_3d_step_plain": "lp2985.step"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply pin. Range 2.5V to 16V (new chip) or 2.2V to 16V (legacy). Requires a 1µF or larger input capacitor from this pin to ground."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the regulator. Carries the quiescent (GND pin) current, up to about 890µA at 150mA load."
      },
      {
        "number": "3",
        "name": "ON/OFF",
        "type": "input",
        "description": "Active-high enable input for the LDO. Drive high (≥1.6V) to enable the regulator, low (≤0.15V) to place the device in shutdown. Tie to VIN if unused; do not leave floating. Withstands up to 16V (legacy) or 18V (new chip)."
      },
      {
        "number": "4",
        "name": "BYPASS",
        "type": "passive",
        "description": "Reference-voltage bypass pin used to lower output noise. Connect an external capacitor (typically 10nF) from BYPASS to GND to achieve the specified 30µVRMS noise performance and improve PSRR."
      },
      {
        "number": "5",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated output of the LDO, delivering up to 150mA at the factory-fixed output voltage (1.2V-5.0V in 100mV steps for new chip). Requires an output capacitor of at least 2.2µF (new chip) or 1µF effective, with ESR ≤1Ω for stability."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/lp2985.pdf",
        "pages": 43,
        "sha256": "bd79c7c5719a63c1",
        "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": [
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          2.9,
          1.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "720a6eab0024069bbee68e7cb4c3ff1149468a34611225cdc852662c5d0ec2b7",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lp2985-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "3df4cbd6f583463daa501fa265718245a0a1557ac8d38bb09ddadb9bd795bf03",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "Low-noise LDO regulator",
      "Output current": "150 mA",
      "Output voltage": "3.3 V (fixed, this variant)",
      "Noise": "low (bypass-pin filtered)",
      "Enable": "ON/OFF logic pin",
      "Dropout": "~280 mV at 150 mA",
      "Input voltage": "up to 16 V",
      "Package": "SOT-23-5"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lp2985",
    "low noise ldo",
    "150ma ldo",
    "rf regulator",
    "3.3v ldo enable"
  ],
  "discovery_pitch": "LP2985 150 mA low-noise LDO (SOT-23-5) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "viewers/symbol.html",
    "viewers/footprint.html",
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  ],
  "variants": [
    {
      "mpn": "LP2985AIM5-3.3 (SOT-23-5)",
      "kind": "packaging"
    },
    {
      "mpn": "LP2985IM5X-3.3 (SOT-23-5, tape & reel)",
      "kind": "packaging"
    }
  ]
}