The TPS2074 and TPS2075 provide a complete USB hub power solution by incorporating three major functions: current-limited power switches for four ports, a 3.3-V 100-mA regulator, and a DP0 line control to signal attach/detach of the hub.
These devices are designed to meet bus-powered and self-powered hub requirements. These devices are also designed for hybrid hub implementations and allow for automatic switching from self-powered mode to bus-powered mode if loss of self-power is experienced. This feature can be disabled by applying a logic high to the BP_DIS input
Each port has a current-limited 100-m
N-channel MOSFET high-side power switch for 100-mA bus-powered operation. All the N-channel MOSFETs are designed without parasitic diodes, preventing current backflow into the inputs.
For applications where a 5-V regulator is needed, use the TPS2070 or TPS2071 device.
| Product type | Fixed current limit, Power switch, Switch with LDO |
| Vin (min) (V) | 4.5 |
| Vin (max) (V) | 5.5 |
| Current limit (A) | 0.2 |
| Operating temperature range (°C) | -40 to 125 |
| Current limit accuracy at 1 A | 0.4 |
| Rating | Catalog |
| SSOP (DB) | 24 | 63.96 mm² 8.2 x 7.8 |
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