# LM5072MHX-80

**Texas Instruments** · Power Over Ethernet (PoE) Controllers · HTSSOP-16-EP

LM5072MHX-80 from Texas Instruments, in a HTSSOP-16-EP. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | RT | passive | PWM controller oscillator frequency programming pin. |
| 2 | SS | passive | Soft-start programming pin. |
| 3 | VIN | power_in | Positive supply pin for the PD interface and the internal PWM controller start-up regulator. |
| 4 | RCLASS | passive | PD classification programming pin. |
| 5 | ICL_FAUX | bidirectional | Inrush current limit programming pin that also serves as the front auxiliary power enable pin. |
| 6 | DCCL | passive | PD interface DC current limit programming pin. |
| 7 | VEE | power_in | Negative supply pin for the PD interface, connected to the PoE and/or front auxiliary power return path. |
| 8 | RTN | power_in | PWM controller power return, connected to the drain of the internal PD interface hot swap MOSFET and to be externally connected to the PWM controller reference ground. |
| 9 | OUT | output | PWM controller gate driver output pin. |
| 10 | VCC | power_out | PWM controller start-up regulator output pin. |
| 11 | nPGOOD | output | PD interface Power Good indicator and delay timer pin, where an active low state indicates the PoE interface is in normal operation. |
| 12 | CS | input | PWM controller current sense input pin. |
| 13 | RAUX | input | Rear auxiliary power enable pin that can be programmed for auxiliary power dominance over PoE power. |
| 14 | FB | input | PWM controller voltage feedback pin and inverting input of the internal error amplifier; connect to ARTN to disable the error amplifier in isolated DC-DC converter applications. |
| 15 | COMP | bidirectional | Output of the internal error amplifier and control input to the PWM comparator, controlled by the secondary side error amplifier via an opto-coupler in isolated applications. |
| 16 | ARTN | power_in | PWM controller reference ground pin that should be shorted externally to RTN as a single point ground connection to improve noise immunity. |
| 17 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | HTSSOP-16-EP |
| Category | Power Management (PMIC) |
| Pins | 17 |

## CAD (KiCad official)

- Symbol: `LM5072MHX-80`
- Footprint: `Package_SO:TSSOP-16-1EP_4.4x5mm_P0.65mm`
- 3D model: HTSSOP-16-EP (KiCad packages3D, STEP)
- 3D model files: `lm5072mhx-80-etched.step` / `lm5072mhx-80-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm5072mhx-80.step` / `lm5072mhx-80.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/lm5072) (37 pp, sha256 `2880e6942fe74392`, retrieved 2026-10-08, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (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/lm5072mhx-80-datasheet.pdf)