Texas Instruments TPS2543RTET, USB high-side power switch, single N-channel output, 4.5 V to 5.5 V load, 3 A max, 73 mOhm typical Rds(on), 16-WQFN (3x3 mm) exposed-pad package.
| Parameter | Value |
|---|---|
| Input type | Non-Inverting |
| Output type | N-Channel |
| Type | USB Switch |
| Mounting | Surface Mount |
| Voltage - load | 4.5V ~ 5.5V |
| Voltage - supply (Vcc (Vdd)) | Not Required |
| Output current | 3A |
| I/O channels | 1 |
| Interface | On/Off |
| Operating temperature | -40°C~125°C(TJ) |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Rds on | 73mOhm |
| Case | 16-WFQFN Exposed Pad |
| Fault protection | Current Limiting (Adjustable), Over Temperature, UVLO |
| Output configuration | High Side |
| Ratio - Input:Output | 1:1 |
The TPS2543RTET: The 73 mOhm typical Rds(on) at 5 V means the voltage drop across the switch at full load is about 220 mV — tight enough for a 5 V USB port to stay within the 4.75 V minimum downstream spec, but the PCB trace and connector losses still need to be budgeted.
The switch is a power-path device with an On/Off interface — it does not handle data lines. It can supply the 5 V VBUS for a USB 2.0 port as long as the host controller manages the data pair separately.