AS1374 - austriamicrosystems introduces new dual ultra low voltage noise LDO with excellent power supply rejection ratio

AS1374 is the dual low drop out regulator of choice for powering circuits that require a low-noise supply, such as RF, cell-phone cameras, wireless base stations and PA bias supplies. Its’ superior performance in radio based designs provides the engineers much needed design margin while maintaining the overall system integrity”, said Bruce Ulrich, marketing director Consumer & Communications at austriamicrosystems. “Offering low dropout voltage as well as low quiescent current, this dual ultra low voltage noise LDO is ideally suited for any battery-powered device and complements our family of ultra low noise LDO’s.”



austriamicrosystems’ AS1374 operates from a 2 to 5.5V supply, making it ideal for portable battery powered applications. Offering low 120mV dropout at 200mA load currents at each output, it has been designed and optimized to work with low-cost, small-capacitance ceramic capacitors. The AS1374 is available with pre-programmed output voltages between 1.2V and 3.6V (programmable in 50mV steps). The device uses an advanced architecture to achieve ultra low output voltage noise of 20µVRMS and a power supply rejection ratio of better than 85dB (@ 1kHz). Two active-high enable pins allow the possibility to switch on or off each output independently from each other.



The AS1374 requires only 1µF output capacitor for stability at any load. The device is available in a 6-bump WLP package.