LM5070MTCX-50

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm5070mtcx-50",
  "title": "LM5070MTCX-50",
  "brief": "Texas Instruments Power Over Ethernet (PoE) Controllers, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "power management (pmic)",
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  "component": {
    "mpn": "LM5070MTCX-50",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-16",
    "pin_count": 16,
    "category": "Power Management (PMIC)",
    "subcategory": "Power Over Ethernet (PoE) Controllers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm5070",
    "parts": {
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      "lbr": "lm5070mtcx-50.lbr"
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    "distributor_links": {
      "lcsc": "C2869267"
    },
    "pins": [
      {
        "number": "1",
        "name": "VIN",
        "type": "power_in",
        "description": "System high potential input; the positive power supply connection from the Power over Ethernet source in the range 1.8V to 75V."
      },
      {
        "number": "2",
        "name": "RSIG",
        "type": "passive",
        "description": "Signature resistor pin; connect a 25kΩ external signature resistor from VIN to this pin to enable IEEE 802.3af detection mode."
      },
      {
        "number": "3",
        "name": "RCLASS",
        "type": "passive",
        "description": "Classification resistor pin; connect the external classification programming resistor from this pin to VEE to set the device power class (0-4)."
      },
      {
        "number": "4",
        "name": "UVLO",
        "type": "input",
        "description": "Undervoltage lockout threshold pin; the voltage at this pin is compared to a 2.00V reference to enable or disable converter operation based on VIN levels set by external resistor divider."
      },
      {
        "number": "5",
        "name": "UVLORTN",
        "type": "passive",
        "description": "Return pin for the external UVLO resistor divider network; provides the reference point between the upper and lower UVLO programming resistors."
      },
      {
        "number": "6",
        "name": "RCLP",
        "type": "passive",
        "description": "Current limit programming pin; connect an external resistor from this pin to VEE to program the inrush current limit from 75mA to 390mA, or leave open for the default 390mA limit."
      },
      {
        "number": "7",
        "name": "VEE",
        "type": "power_in",
        "description": "System low potential input and negative power supply return; the more negative input potential (0V reference, absolute rating −0.3V to 80V with respect to RTN)."
      },
      {
        "number": "8",
        "name": "RTN",
        "type": "power_in",
        "description": "System return for the PWM converter; the drain of the internal current limiting power MOSFET which connects VEE to the return path of the DC-DC converter."
      },
      {
        "number": "9",
        "name": "OUT",
        "type": "output",
        "description": "Gate driver output of the PWM controller; provides the DC-DC converter control signal with 800mA peak sink and source current capability."
      },
      {
        "number": "10",
        "name": "VCC",
        "type": "power_out",
        "description": "Regulated output of the internal high voltage series pass regulator; typical output voltage 7.8V nominal (5.9V to 8.1V operating range, 15mA current limited)."
      },
      {
        "number": "11",
        "name": "FB",
        "type": "input",
        "description": "Feedback signal input to the inverting terminal of the internal error amplifier (non-inverting reference fixed at 1.25V) for output voltage regulation in non-isolated applications."
      },
      {
        "number": "12",
        "name": "COMP",
        "type": "output",
        "description": "Error amplifier output and PWM comparator input; open-drain output with internal 5K pull-up to 5V reference, used for loop compensation and PWM duty cycle control."
      },
      {
        "number": "13",
        "name": "CS",
        "type": "input",
        "description": "Current sense input for cycle-by-cycle current mode control and over-current protection; if CS voltage exceeds 0.5V threshold, the OUT pin switches low immediately."
      },
      {
        "number": "14",
        "name": "RT/SYNC",
        "type": "passive",
        "description": "Oscillator timing resistor pin and synchronization input; external resistor from RT to ARTN sets the switching frequency, and accepts narrow AC-coupled synchronization pulses from external clock."
      },
      {
        "number": "15",
        "name": "SS",
        "type": "input",
        "description": "Soft-start input pin; connect an external capacitor to control the soft-start ramp rate via internal 10μA current source to achieve gradual power-on without output overshoot."
      },
      {
        "number": "16",
        "name": "ARTN",
        "type": "power_in",
        "description": "Analog PWM supply return and ground reference for sensitive analog circuitry including the SMPS current limit amplifier and gate driver return."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.2",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.2",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-4-6",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
        "pages_sent": 27,
        "cost_usd": 0.248,
        "at": "2026-09-17T22:24:22"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm5070",
        "pages": 27,
        "sha256": "b419d62f541011b3",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
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        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "6ad5e98224d02a427d9a6b929a28dbc158b9925fba5adec12db05079f1016948",
        "checked": "2026-10-07",
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        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "TSSOP-16",
      "Category": "Power Management (PMIC)",
      "Pins": "16"
    }
  },
  "variants": [],
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  "discovery_pitch": "LM5070MTCX-50 (Texas Instruments) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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  "updated_at": "2026-09-28T17:01:39.631Z"
}