The TPS2149 is an integrated power management solution for USB bus-powered hubs that provides a 3.3V regulated output for the USB controller and two high-side MOSFET switches to power the downstream ports. The TPS2149 has independent logic enables that are compatible with both 5V and 3V logic.
The TPS2149/TPS2159 family integrates a 3.3‑V low‑dropout regulator and two high‑side MOSFET power switches in a compact MSOP package. It is intended for USB bus‑powered hub power management, offering independent enable inputs, over‑current indication, and thermal protection. Options include fixed‑LDO and adjustable‑LDO versions in MSOP‑8, MSOP‑10, and TSSOP‑14 packages.
The datasheet details electrical characteristics such as input voltage range (2.9‑5.5 V), LDO output voltage (3.3 V), continuous current ratings (200 mA LDO, 150 mA per switch), on‑state resistance (580 mΩ), UVLO threshold (2.2 V), and timing parameters. Pin functions, functional block diagram, land‑pattern guidelines, and TI’s standard warranty and safety notices are also included.
| Input voltage range | 2.9‑5.5 V |
|---|---|
| LDO output voltage | 3.3 V |
| LDO continuous current | 200 mA |
| Power‑switch continuous current per switch | 150 mA |
| Operating temperature (ambient) | -40 °C to 85 °C |
| Dropout voltage (typical) | 0.35 V |
| Enable input high‑level voltage | 2 V |
| Enable input low‑level voltage | 0.8 V |
The devices operate with an input voltage between 2.9 V and 5.5 V.
Both parts provide a fixed 3.3 V output from the internal LDO.
Each high‑side MOSFET switch is rated for 150 mA continuous current.