The TPS2044 and TPS2054 quad power-distribution switches are intended for applications where heavy capacitive loads and short circuits are likely to be encountered. The TPS2044 and the TPS2054 incorporate in single packages four 135-mΩ N-channel MOSFET high-side power switches for power-distribution systems that require multiple power switches. Each switch is controlled by a logic enable that is compatible with 5-V logic and 3-V logic. Gate drive is provided by an internal charge pump that controls the power-switch rise times and fall times to minimize current surges during switching. The charge pump, requiring no external components, allows operation from supplies as low as 2.7 V. When the output load exceeds the current-limit threshold or a short is present, the TPS2044 and TPS2054 limit the output current to a safe level by switching.
The TPS2044 and TPS2054 integrate four 135‑mΩ N‑channel MOSFET high‑side switches in a single 16‑pin SOIC package. Each channel supplies a minimum of 500 mA and is controlled by a logic‑level enable input compatible with 5‑V or 3‑V logic. An internal charge pump allows operation down to 2.7 V supply voltage.
The devices feature over‑current and thermal protection: an OCx open‑drain output goes active low when a fault occurs, and a dual‑threshold thermal trip shuts off the offending switch while allowing the others to remain active. Additional functions include undervoltage lockout, sense FET current monitoring, and configurable active‑high or active‑low enable logic.
| Continuous current per channel | 500 mA |
|---|---|
| Operating voltage range | 2.7 V to 5.5 V |
| On‑state resistance | 135 mΩ |
| Ambient temperature range | –40 °C to 85 °C |
| ESD protection (Human‑Body Model) | 2 kV |
The OCx open‑drain output goes active low when an over‑current or over‑temperature condition is detected.
The rise time is typically in the 2‑ms to 4‑ms range.