LP4951C Datasheet | National Semiconductor

Description The LP4950C and LP4951C are micropower voltage regulators with very low quiescent current (75µA typ.) and very low dropout voltage (typ. 40m V at light loads and 380m V at 100m A). They are ideally suited for use in battery-powered systems. Furthermore, the quiescent current of the LP4950C/LP4951C increases only slightly in dropout, prolonging battery life. The LP4950C in the popular 3-pin TO-92 package is pin patible with older 5V regulators. The 8-lead LP4951C is available in a plastic surface mount package and offers additional system functions. One such feature is an error flag output which warns of a low output voltage, often due to falling batteries on the input. It may be used for a power-on reset. A second feature is the logic-patible shutdown input which enables the regulator to be switched on and off....