component
LM5070MTCX-50
Public Made by Adomby adom
Texas Instruments Power Over Ethernet (PoE) Controllers, TSSOP-16. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLM5070MTCX-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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm5070mtcx-50.step/lm5070mtcx-50.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (27 pp, sha256
b419d62f541011b3, retrieved 2026-09-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).