Features:
5.0V, 3.3V, 3.0V and 2.5V Versions
High Accuracy Output Voltage
Extremely Low Quiescent Current
Low Dropout Voltage
Extremely Tight Load and Line Regulation
Very Low Temperature Coefficient
Current and Thermal Limiting
Needs Minimum Capacitance (1mmF) for Stability
Unregulated DC Positive Transients 60V
ADDITIONAL FEATURES (AMS2951 ONLY) 1.24V to 29V Programmable Output
Error Flag Warning of Voltage Output Dropout
Logic Controlled Electronic Shutdown
ApplicationBattery Powered Systems
Portable Consumer Equipment
Cordless Telephones
Portable (Notebook) Computers
Portable Instrumentation
Radio Control Systems
Automotive Electronics
Avionics
Low-Power Voltage Reference
Pinout
SpecificationsInput Supply Voltage .....................................................................-0.3 to +30V
Wave......... ......... ......... ......... ......... ......... ......... ......... ........4 seconds, 260
SHUTDOWN Input Voltage, Infrared ..... ..... ..... ..... ................4 seconds, 240
Error Comparator Output Vapor Phase ..... ..... ..... ..... ...........4 seconds, 219
FEEDBACK Input Voltage ..... ..... ..... ..... ..... ..... ............................-1.5 to +30V
Voltage,(Note 9) ESD TBD
Junction Temperature ..... ..... ..... ..... .....................................................+150
Storage Temperature ..... ..... ..... ..... ..........................................-65 to +150
(Note 9) (Note 10) OPERATING RATINGS (Note 1)
Power Dissipation Internally Limited
DescriptionThe AMS2950 and AMS2951 are micropower voltage regulators ideally suited for use in battery-powered systems. These devices feature very low quiescent current (typ.75A), and very low dropout voltage (typ.45mV at light loads and 380mV at 150mA) thus prolonging battery life. The quiescent current increases only slightly in dropout. The AMS2950/AMS2951 has positive transient protection up to 60V and can survive unregulated input transient up to 20V below ground.
The AMS2950 and AMS2951 were designed to include a tight initial tolerance (typ. 0.5%), 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 reference.
The AMS2950 is offered in the 3-pin TO-92 package. AMS2951 is available in 8-pin plastic SOIC and DIP packages and offers three major additional system features. An error flag outputwarns of a low output voltage, often due to failing batteries on input. The AMS2951 also features the logic-compatible shutdown input which enables the regulator to be switched on and off. The AMS2951 device may be pin-strapped for a 5.0V, 3.3V, 3.0V or 2.5 output, or programmed from 1.24V to 29V with an external pair of resistors.
AMS2950 Data Sheet
