The TPS2045 and TPS2055 are current-limited power-distribution switches designed for applications with large capacitive loads and potential short circuits. Each switch is controlled by a logic enable compatible with 5V and 3V logic and features a low on-resistance N-channel MOSFET high-side power switch. The gate drive is provided by an internal charge pump that controls the rise and fall times of the power switch to minimize current surges during switching. The charge pump requires no external components and allows operation from supplies as low as 2.7V. When the output load exceeds the current-limit threshold or a short circuit occurs, the TPS2045 and TPS2055 limit the output current to a safe level by switching into a constant-current mode.
The TPS2045 and TPS2055 are current‑limited power‑distribution switches intended for applications with heavy capacitive loads and possible short circuits. Each device includes an internal charge pump, over‑current and thermal protection, and a logic‑compatible enable input that works with 5‑V and 3‑V logic levels.
The datasheet details electrical characteristics such as on‑state resistance, standby current, voltage ranges, and thermal ratings, and lists the available 8‑pin SOIC and PDIP packages. It also includes recommended operating conditions, absolute maximum ratings, and package dimensions.
| Maximum continuous output current | 0.44 A |
|---|---|
| Operating voltage range | 2.7 V to 5.5 V |
| Package types | 8‑pin SOIC and 8‑pin PDIP |
| Ambient temperature range | ‑40 °C to 85 °C |
| ESD protection (Human‑Body Model) | 2 kV |
| Typical rise time | 2.5 ms |
The devices are designed to limit at 0.44 A load.
They operate from 2.7 V to 5.5 V.
Both devices are offered in 8‑pin SOIC and 8‑pin PDIP packages.