AMS2942 Datasheet | Advanced Monolithic Systems

FEATURES - Adjustable from 1.23V to 42V - High Accuracy Output Voltage - Extremely Low Quiescent Current - Low Dropout Voltage - Tight Load and Line Regulation - Low Temperature Coefficient - Current and Thermal Protection - Unregulated DC Positive Transients 60V - Error Flag Warning of Voltage Output Dropout - Logic Controlled Electronic Shutdown HIGH VOLTAGE LOW DROPOUT REGULATOR Ro HS pliant APPLICATIONS - Telephone Systems - High Voltage Power Supply - Cordless Telephones - Laboratory Instrumentation - Radio Control Systems - Automotive Electronics - Avionics GENERAL DESCRIPTION The AMS2942 are micropower voltage regulators ideally suited for use with high voltage powered systems. This device feature very low quiescent current (typ.130µA), and very low dropout voltage (typ.45m V at light loads and 380m V at 100m A). The quiescent current increases only slightly in dropout. The AMS2942 has positive transient protection up to 60V and can survive unregulated input transient up to 20V below ground. AMS2942 is designed with a tight initial voltage reference tolerance, excellent load and line regulation (typ. 0.05%), and a very low output voltage temperature coefficient, making these devices useful as a low-power voltage regulator in telephone applications, using the telephone line as a power source. The AMS2942 is available in a special 8-pin plastic SOIC in which pin 2 and 3 are fused together with the package paddle serving also as heat sink. An error flag output warns of a low output voltage, often due to failing voltage on input line. A logic-patible shutdown input is available, which enables the regulator to be switched on and off. The output voltage can be programmed from 1.23V to 42V with an external pair of resistors. ORDERING INFORMATION PACKAGE TYPE 8 LEAD SOIC AMS2942AS AMS2942BS OPERATING TEMP. RANGE IND IND PIN CONNECTION 8L SOIC OUTPUT 1 GROUND 2 GROUND 3 ON/OFF 4 8 INPUT 7 FEEDBACK 6 N/C 5 ERROR Top View Advanced Monolithic Systems, Inc....