The TPS2045A through TPS2048A and TPS2055A through TPS2058A power-distribution switches are intended for applications where heavy capacitive loads and short circuits are likely to be encountered. These devices incorporate 80-mΩ N-channel MOSFET high-side power switches for power-distribution systems that require multiple power switches in a single package. Each switch is controlled by an independent logic enable input. Gate drive is provided by an internal charge pump designed to control the power-switch rise times and fall times to minimize current surges during switching. The charge pump requires no external components and allows operation from supplies as low as 2.7 V. When the output load exceeds the current-limit threshold or a short is present, these devices limit the output current to a safe level by switching.
The TPS2045A‑TPS2058A family are current‑limited power‑distribution switches designed for applications with heavy capacitive loads and possible short‑circuit conditions. Each device integrates an N‑channel MOSFET high‑side switch, an internal charge pump, and independent enable inputs for up to four switches in a single package.
Key features include a 0.5 A continuous load limit, built‑in over‑current and thermal protection, undervoltage lockout around 2 V, and low standby current (≤10 µA for single/dual devices). The datasheet details pin assignments, functional block diagrams, absolute maximum ratings, and mechanical dimensions.
| Continuous load current per switch | 0.5 A |
|---|---|
| Typical rise time | 2.5 ms |
| Standby supply current (single/dual) | ≤10 µA |
| Operating voltage range | 2.7 V to 5.5 V |
| Undervoltage lockout threshold | ≈2 V |
Each switch can continuously source up to 0.5 A.
The typical rise time is about 2.5 ms.
The standby supply current is less than 10 µA for single and dual devices.