# TPS2549IRTETQ1

**Texas Instruments** · USB Converters · WQFN-16-EP(3x3)

TPS2549IRTETQ1 from Texas Instruments, in a WQFN-16-EP(3x3). 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 | IN | power_in | Input supply voltage 4.5V to 6.5V; requires 0.1µF or greater ceramic bypass capacitor to GND. |
| 2 | DM_OUT | bidirectional | D− data line to upstream USB host controller; 0 to 3.6V, ±30mA continuous current. |
| 3 | DP_OUT | bidirectional | D+ data line to upstream USB host controller; 0 to 3.6V, ±30mA continuous current. |
| 4 | CS | output | Current sense output providing proportional sink current for cable compensation feedback to upstream regulator. |
| 5 | EN | input | Enable logic input; low level disables power switch and signal switches. |
| 6 | CTL1 | input | Logic-level control input for charging mode and signal switch selection; tie directly to IN or GND without pullup. |
| 7 | CTL2 | input | Logic-level control input for charging mode and signal switch selection; tie directly to IN or GND without pullup. |
| 8 | CTL3 | input | Logic-level control input for charging mode and signal switch selection; tie directly to IN or GND without pullup. |
| 9 | STATUS | output | Active-low open-drain output asserted when load exceeds load-detection threshold; 10mA maximum sink. |
| 10 | DP_IN | bidirectional | D+ data line from downstream connector; 0 to 3.6V, ±30mA continuous current. |
| 11 | DM_IN | bidirectional | D− data line from downstream connector; 0 to 3.6V, ±30mA continuous current. |
| 12 | OUT | power_out | Power switch output; 3.2A maximum continuous current at −40°C to 85°C. |
| 13 | FAULT | output | Active-low open-drain output asserted during overtemperature, overcurrent, or DP_IN/DM_IN overvoltage; 10mA sink. |
| 14 | GND | power_in | Ground connection; internally connected to thermal pad for heat-sinking to circuit board. |
| 15 | ILIM_LO | input | Connect external resistor to GND (10.4kΩ to 1MΩ) to set low current-limit and load-detection thresholds. |
| 16 | ILIM_HI | input | Connect external resistor to GND (10.4kΩ to 1MΩ) to set high current-limit threshold. |
| 17 | PAD | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WQFN-16-EP(3x3) |
| Category | Interface |
| Pins | 17 |

## CAD (KiCad official)

- Symbol: `TPS2549IRTETQ1`
- Footprint: `Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm`
- 3D model: WQFN-16-EP(3x3) (KiCad packages3D, STEP)
- 3D model files: `tps2549irtetq1-etched.step` / `tps2549irtetq1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps2549irtetq1.step` / `tps2549irtetq1.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/tps2549-q1) (46 pp, sha256 `7bf9a3933c8fa4bf`, retrieved 2026-10-03, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (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/tps2549irtetq1-datasheet.pdf)