Texas Instruments TPS2046 Manuals

TEXAS INSTRUMENTS TPS2046 TPS2056 DUAL CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES handbook

The TPS2046 and TPS2056 dual power-distribution switches are intended for applications where heavy capacitive loads and short circuits are likely. These devices incorporate in single packages two 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 compatible with 5-V 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 requires no external components and allows operation from supplies as low as 2.7 V. When the output load exceeds the maximum current limit, the internal short-circuit protection circuit will turn off the output and generate a logic high output, indicating an overcurrent condition. Thermal shutdown protection prevents permanent output switch damage due to excessive temperature. Undervoltage lockout function shuts off the output when the supply voltage drops below 2.7 V.