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austriamicrosystems expands its Low Dropout Regulator (LDO) portfolio. The AS1353 and the AS1356 ICs are optimized to deliver improved operating times in battery-powered portable equipment such as PDAs, digital cameras, Bluetooth and GPS modules as a result of their low dropout voltage. The AS1353 features low noise of only 30µ Vrms between 10 Hz and 100 kHz. This allows the use of a small and less expensive 1µF ceramic output capacitor. With a power-supply rejection ratio of 57 dB at 100 kHz, the AS1353 fulfils the noise requirements for a variety of wireless applications. Additionally, the AS1356 offers a power good signal that indicates when the output voltage is within the tolerance of 5%.