LP2953

LP2952/LP2952A/LP2953/LP2953A Adjustable Micropower Low-Dropout Voltage Regulators May 1999 LP2952/LP2952A/LP2953/LP2953A Adjustable Micropower Low-Dropout Voltage Regulators General Description The LP2952 and LP2953 are micropower voltage regulators with very low quiescent current (130 µA typical at 1 mA load) and very low dropout voltage (typ. 60 mV at light load and 470 mV at 250 mA load current). They are ideally suited for battery-powered systems. Furthermore, the quiescent current increases only slightly at dropout, which prolongs battery life. The LP2952 and LP2953 retain all the desirable characteristics of the LP2951, but offer increased output current, additional features, and an improved shutdown function. The internal crowbar pulls the output down quickly when the shutdown is activated. The error flag goes low if the output voltage drops out of regulation. Reverse battery protection is provided. The internal voltage reference is made available for external use, providing a low-T.C. reference with very good line and load regulation. The parts are available in DIP and surface mount packages. Features n n n n n n n n n n Output voltage adjusts from 1.23V to 29V Guaranteed 250 mA output current Extremely low quiescent current Low dropout voltage Extremely tight line and load regulation Very low temperature coefficient Current and thermal limiting Reverse battery protection 50 mA (typical) output pulldown crowbar 5V and 3.3V versions available LP2953 Versions Only ...