DESCRIPTION
MAS9123 is a low dropout voltage regulator with an enable/disable pin, which allows device to be turned off or on by pulling control to low or high.
Due to the very low noise level of only 9.5 µVrms MAS9123 is highly suitable for very sensitive circuits, e.g., in portable applications. In addition to the noise level, MAS9123 excels in dropout voltage (95 mV typical at 50 mA) and in start-up time (with bypass capacitor typically 20 µs from start-up to within ±1% of VOUT(NOM)). Also its ripple rejection ability of 68 dB at 10 kHz exceed that of competition.

FEATURES
• Optimized for Fast Start-up
• Very Low Noise
• Internal Thermal Shutdown
• Short Circuit Protection
• Functionally and Pin Compatible with LP2982/LP2985/LP3985
• Small SOT23-5 or tiny WL-CSP Package
• Output Voltage Options: 2.8, 3.0 and 3.3 V, see Ordering Information p. 12

APPLICATIONS
• RF Oscillators
• GPS Systems
• RF Section of Wireless Systems
• RF Section of Cellular Phones
• Oven Oscillators
• RF Section of Cordless Phones
• Battery Powered Systems
• Portable Systems
• Radio Control Systems