The TPS2149 incorporates two power distribution switches and an LDO in one small package, providing a USB bus-powered hub power management solution that saves up to 60% in board space over typical implementations.
The TPS2149 meets USB 2.0 bus-powered hub requirements. An integrated LDO regulates the 5-V bus power down to 3.3 V for the USB controller. The two MOSFET switches provide power to the downstream ports. With independent enables, the downstream ports remain unpowered until the hub completes enumeration.
Each power-distribution switch is capable of supplying 200 mA of continuous current, and the independent logic enables are compatible with 5-V logic and 3-V logic. The switches and the LDO are designed with controlled rise times and fall times to minimize current surges.
The TPS2149 has active-low enables while the TPS2159 has active-high enables.
PowerPAD is a trademark of Texas Instruments.
| Product type | Fixed current limit, Power switch, Switch with LDO |
| Vin (min) (V) | 2.9 |
| Vin (max) (V) | 5.5 |
| Operating temperature range (°C) | -40 to 100 |
| Current limit accuracy at 1 A | 0.33 |
| Rating | Catalog |
| HVSSOP (DGN) | 8 | 14.7 mm² 3 x 4.9 |
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