tps2045 and tps2055 are switches for applications where heavy capacitive loads and short circuits are likely
The TPS2045 and TPS2055 are current-limited power-distribution switches designed for applications involving heavy capacitive loads and short circuits, such as notebook and desktop PCs. These devices utilize a 135-mΩ N-channel MOSFET high-side switch controlled by a logic enable input compatible with 5-V and 3-V logic levels.
| Maximum on-state resistance | 135 mΩ |
|---|---|
| Continuous output current | 250 mA |
| Operating input voltage range | 2.7 V to 5.5 V |
| Typical rise time | 2.5 ms |
| Maximum standby supply current | 10 µA |
| ESD protection (Human-Body-Model) | 2 kV |
| Operating temperature range | -40°C to 85°C |
| Short-circuit current limit | 0.44 A |
The enable input is compatible with both TTL and CMOS logic levels.
The internal thermal-sense circuit shuts off the switch when the junction temperature rises to approximately 140°C.
The charge pump allows operation from supplies as low as 2.7 V.