LP2951 Micropower LDO

{
  "schema_version": 1,
  "type": "component",
  "slug": "lp2951",
  "title": "LP2951 Micropower LDO",
  "brief": "100 mA micropower adjustable low-dropout regulator with error flag and shutdown.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "regulator",
    "ldo",
    "micropower",
    "adjustable",
    "shutdown",
    "ti",
    "soic-8"
  ],
  "component": {
    "mpn": "LP2951",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Power Management",
    "subcategory": "Linear Regulator (LDO)",
    "datasheet": "https://www.ti.com/lit/ds/symlink/lp2951.pdf",
    "parts": {
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    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "OUTPUT",
        "type": "power_out",
        "description": "Regulated output supply, up to 100mA. Requires a ceramic capacitor to GND for stability (COUT 1µF to 100µF, ESR 0 to 2Ω on the new chip). Place the output cap as close to the pin as possible."
      },
      {
        "number": "2",
        "name": "SENSE",
        "type": "input",
        "description": "Kelvin sense of the output voltage. Tie to OUTPUT (with FEEDBACK tied to VTAP) for the fixed-output configuration. Leave floating when using the adjustable-output configuration."
      },
      {
        "number": "3",
        "name": "SHUTDOWN",
        "type": "input",
        "description": "Active-high shutdown input. Drive high (>~1.5V) to disable the regulator; drive low (VSHUTDOWN ≤ 0.7V) to enable normal operation. Absolute max 42V (new chip) / 35V (legacy)."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground reference for the regulator, error comparator, and internal bandgap."
      },
      {
        "number": "5",
        "name": "ERROR",
        "type": "output",
        "description": "Active-low open-drain error flag. Asserts (pulls low) when VOUT drops more than ~6% below its nominal value, indicating an out-of-regulation or under-voltage condition. Requires an external pull-up; useful for power-sequencing multiple rails."
      },
      {
        "number": "6",
        "name": "VTAP",
        "type": "input",
        "description": "Tap of the internal fixed-voltage resistor divider. Connect to FEEDBACK for the fixed 3.3V/5V output option. Leave floating when using the device in adjustable-output mode."
      },
      {
        "number": "7",
        "name": "FEEDBACK",
        "type": "input",
        "description": "Error-amplifier feedback input (regulates to VREF ≈ 1.235V). Connect to VTAP (with OUTPUT tied to SENSE) for fixed output; connect to the mid-point of an external R1/R2 divider for adjustable output (VOUT = VREF × (1 + R1/R2), VREF to 29V). Divider current should be ≥12µA or add a feed-forward cap for stability."
      },
      {
        "number": "8",
        "name": "INPUT",
        "type": "power_in",
        "description": "Unregulated supply input, 2V to 30V operating (absolute max 42V new chip / 35V legacy). Bypass with at least a 1µF capacitor to GND close to the pin."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/lp2951.pdf",
        "pages": 49,
        "sha256": "4a441bb26d2b5975",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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      "symbol": "viewers/symbol.html",
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      {
        "file": "lp2951.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
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        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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    ]
  },
  "metadata": {
    "specs": {
      "Type": "Micropower adjustable LDO",
      "Output current": "100 mA",
      "Quiescent current": "75 uA typ",
      "Dropout voltage": "380 mV at 100 mA",
      "Output": "Adjustable (1.24 V ref) or fixed 3.0/3.3/5 V",
      "Features": "Shutdown, error flag",
      "Supply voltage": "Up to 30 V",
      "Operating temperature": "-40 C to 125 C"
    }
  },
  "sections": [
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    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "micropower LDO",
    "adjustable regulator",
    "battery regulator",
    "low quiescent current"
  ],
  "discovery_pitch": "A 100 mA micropower LDO with low quiescent current, an error flag, and shutdown for battery-powered designs.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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  "variants": [
    {
      "mpn": "LP2951D",
      "kind": "unknown"
    },
    {
      "mpn": "LP2951DRG",
      "kind": "unknown"
    }
  ]
}