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LM5070MTCX-50
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Texas Instruments Power Over Ethernet (PoE) Controllers, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+52@@ -0,0 +1,52 @@+# LM5070MTCX-50++**Texas Instruments** · Power Over Ethernet (PoE) Controllers · TSSOP-16++LM5070MTCX-50 from Texas Instruments, in a TSSOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | VIN | power_in | System high potential input; the positive power supply connection from the Power over Ethernet source in the range 1.8V to 75V. |+| 2 | RSIG | passive | Signature resistor pin; connect a 25kΩ external signature resistor from VIN to this pin to enable IEEE 802.3af detection mode. |+| 3 | RCLASS | passive | Classification resistor pin; connect the external classification programming resistor from this pin to VEE to set the device power class (0-4). |+| 4 | UVLO | input | 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. |+| 5 | UVLORTN | passive | Return pin for the external UVLO resistor divider network; provides the reference point between the upper and lower UVLO programming resistors. |+| 6 | RCLP | passive | 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. |+| 7 | VEE | power_in | 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). |+| 8 | RTN | power_in | 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. |+| 9 | OUT | output | Gate driver output of the PWM controller; provides the DC-DC converter control signal with 800mA peak sink and source current capability. |+| 10 | VCC | power_out | 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). |+| 11 | FB | input | 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. |+| 12 | COMP | output | 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. |+| 13 | CS | input | 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. |+| 14 | RT/SYNC | passive | 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. |+| 15 | SS | input | 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. |+| 16 | ARTN | power_in | Analog PWM supply return and ground reference for sensitive analog circuitry including the SMPS current limit amplifier and gate driver return. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | TSSOP-16 |+| Category | Power Management (PMIC) |+| Pins | 16 |++## CAD (KiCad official)++- Symbol: `LM5070MTCX-50`+- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`+- 3D model: TSSOP-16 (KiCad packages3D, STEP)+- 3D model files: `lm5070mtcx-50-etched.step` / `lm5070mtcx-50-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm5070mtcx-50.step` / `lm5070mtcx-50.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/lm5070) (27 pp, sha256 `b419d62f541011b3`, retrieved 2026-09-17, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/lm5070mtcx-50-datasheet.pdf)
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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+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ }+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}