SLVS736C February 2008 – October 2023 TPS2550 , TPS2551
PRODUCTION DATA
The TPS2550/51 are current-limited, power distribution switches using N-channel MOSFETs for applications where short-circuits or heavy capacitive loads are encountered. These devices allow the user to program the current-limit threshold between 100 mA and 1.1 A via an external resistor. Additional device shutdown features include overtemperature protection and reverse-voltage protection. The device incorporates an internal charge pump and gate drive circuitry necessary to drive the N-channel MOSFET. The charge pump supplies power to the driver circuit and provides the necessary voltage to pull the gate of the MOSFET above the source. The charge pump operates from input voltages as low as 2.5 V and requires little supply current. The driver controls the gate voltage of the power switch. The driver incorporates circuitry that controls the rise and fall times of the output voltage to limit large current and voltage surges and provide built-in soft-start functionality.