TPS7A91

{
  "schema_version": 1,
  "type": "component",
  "slug": "tps7a91",
  "title": "TPS7A91",
  "brief": "TI low-noise, high-PSRR LDO, VSON-10. 1 A, adjustable, programmable soft-start, fast transient. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power",
    "ldo",
    "low-noise",
    "high-psrr",
    "vson-10",
    "texas-instruments"
  ],
  "component": {
    "mpn": "TPS7A91",
    "manufacturer": "Texas Instruments",
    "package": "VSON-10",
    "pin_count": 11,
    "category": "Power Management",
    "subcategory": "LDO regulator",
    "datasheet": "https://www.ti.com/lit/ds/symlink/tps7a91.pdf",
    "parts": {
      "symbol": "tps7a91.kicad_sym",
      "footprint": "tps7a91.kicad_mod",
      "model_3d": "tps7a91-etched.glb",
      "model_3d_plain": "tps7a91.glb",
      "model_3d_step": "tps7a91-etched.step",
      "model_3d_step_plain": "tps7a91.step",
      "lbr": "tps7a91.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "OUT",
        "type": "power_out",
        "description": "Regulated output. Tie to pin 2 (both are OUT). A 10 µF or greater capacitor must be connected from this pin to GND for stability. Output range 0.8 V to 5.2 V, up to 1 A."
      },
      {
        "number": "2",
        "name": "OUT",
        "type": "power_out",
        "description": "Regulated output (paralleled with pin 1). Requires a 10 µF or greater output capacitor to GND for loop stability."
      },
      {
        "number": "3",
        "name": "FB",
        "type": "input",
        "description": "Feedback pin. Input to the control-loop error amplifier; regulated to VREF = 0.8 V. Used with an external resistor divider from OUT to GND to set VOUT (VOUT = 0.8 V × (1 + R1/R2))."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground. Connect to the device thermal pad and to the PCB ground plane."
      },
      {
        "number": "5",
        "name": "PG",
        "type": "output",
        "description": "Open-drain power-good indicator for the LDO output. Requires a 10 kΩ to 100 kΩ external pull-up resistor. PG asserts low when VOUT falls below ~88.9% of nominal. May be left floating or tied to GND if unused."
      },
      {
        "number": "6",
        "name": "SS_CTRL",
        "type": "input",
        "description": "Soft-start control pin. Tie to GND or IN to select the NR/SS capacitor charging current (typ 6.2 µA). If no CNR/SS capacitor is used, SS_CTRL must be tied to GND to avoid output overshoot."
      },
      {
        "number": "7",
        "name": "EN",
        "type": "input",
        "description": "Enable input. LDO is enabled when VEN ≥ VIH(EN) (typ 1.1 V, max 6.5 V) and disabled when VEN ≤ VIL(EN) (max 0.4 V). Must be tied to IN if the enable function is not used; do not float."
      },
      {
        "number": "8",
        "name": "NR/SS",
        "type": "passive",
        "description": "Noise-reduction / soft-start pin. Connect an external capacitor (0-10 µF) to bypass the internal band-gap reference; reduces output noise to very low levels and, together with SS_CTRL, sets the output ramp rate to limit inrush current."
      },
      {
        "number": "9",
        "name": "IN",
        "type": "power_in",
        "description": "Input supply pin (paralleled with pin 10). Input range 1.4 V to 6.5 V. A 10 µF or greater input capacitor is required close to the pin."
      },
      {
        "number": "10",
        "name": "IN",
        "type": "power_in",
        "description": "Input supply pin (paralleled with pin 9). Input range 1.4 V to 6.5 V; 10 µF or greater bypass capacitor required."
      },
      {
        "number": "11",
        "name": "Thermal Pad",
        "type": "passive",
        "description": "Exposed die-attach pad on the package bottom. Must be soldered to the PCB ground plane for proper thermal performance; electrically connect to GND."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/tps7a91.pdf",
        "pages": 34,
        "sha256": "c6f72e9e3a061a41",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 11,
        "described": 11,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "tps7a91.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3.0,
          2.98,
          1.02
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "1b436233b33ebba84da89538e97b0062d5b95e5ae0b484c46c569cb67274a3a5",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tps7a91-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3.0,
          2.98,
          1.02
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "494b4d53032a3ec66c85a47d80b8a4a40e828889e66c8d9912a93b65be10451b",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "Low-noise LDO",
      "Output current": "1 A",
      "Noise": "Very low (uVrms-class)",
      "PSRR": "High across frequency",
      "Soft-start": "Programmable (SS_CTRL, NR/SS)",
      "Extras": "Power-good flag",
      "Output": "Adjustable (FB)",
      "Package": "VSON-10"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "tps7a91",
    "low noise ldo",
    "high psrr regulator",
    "1a clean ldo"
  ],
  "discovery_pitch": "TI TPS7A91 low-noise high-PSRR LDO (VSON-10) 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": [
    "page.json",
    "README.md",
    "tps7a91.kicad_sym",
    "tps7a91.kicad_mod",
    "tps7a91.glb",
    "tps7a91.step",
    "tps7a91.lbr",
    "docs/hero.png",
    "docs/tps7a91-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "tps7a91-etched.step"
  ],
  "variants": [
    {
      "mpn": "TPS7A9101DRBR (VSON-10)",
      "kind": "packaging"
    },
    {
      "mpn": "TPS7A9101DSKR (VSON-10, alt)",
      "kind": "packaging"
    }
  ]
}