The TPS2041A through TPS2044A and TPS2051A through TPS2054A 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.
The TPS204x and TPS205x families are current‑limited power‑distribution switches that integrate an 80‑mΩ N‑channel MOSFET high‑side switch, an internal charge pump, and independent enable inputs. Each device can handle up to 500 mA continuous per channel and includes over‑current, thermal, and undervoltage lockout protection.
The devices operate from 2.7 V to 5.5 V, feature typical rise/fall times of 2‑ms to 4‑ms, and provide low standby current (<10 µA single/dual, 20 µA triple/quad). Thermal shutdown occurs near 140 °C, and the OCx output signals fault conditions.
| Maximum continuous current per channel | 500 mA |
|---|---|
| Operating voltage range | 2.7 V to 5.5 V |
| On‑state resistance (RDS(on)) | 135 mΩ |
| Typical rise/fall time | 2 ms to 4 ms |
| Thermal trip temperature | ≈140 °C |
| Undervoltage lockout threshold | ≈2 V |
ENx controls the power switch; a logic low (or high, depending on the series) turns the switch on, while the opposite logic level turns it off.
The power switch uses an N‑channel MOSFET.
The internal charge pump works from input voltages as low as 2.7 V.