Analog Simulation MCP1781

The MCP1781 is a high-voltage, low dropout (LDO) regulator, capable of generating 200 mA output current. The input voltage range of 4.3V to 55V makes it suitable in 12V to 48V power rails and in high-voltage battery packs; automotive applications where operating through large transients such as load dump. A low UVLO at shutdown of 2.3V makes it adequate for cold cranking conditions in automotive applications. The MCP1781 comes in two standard fixed output voltage versions: 3.3V and 5.0V. The regulator output is stable with 3.3 µF ceramic capacitors. The device is protected from short-circuit events by the current foldback function and from overheating by means of thermal shutdown protection. The MCP1781 comes in two 5-lead packages, SOT-223 and TO-252, both with PGOOD pin SHDN pin. While in shutdown, the quiescent current drops to 3.5 µA, allowing for lower, overall power consumption. The device itself has a ground current of 45 µA typical, while delivering maximum output current of 200 mA.