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DESCRIPTIONThe TPS793xx family of low-dropout (LDO) low-power linear voltage regulators features high power-supplyrejecTIon raTIo (PSRR), ultralow noise, fast start-up, and excellent line and load transient responses in asmall-outline SOT23 package. Each device in the family is stable, with a small 2.2-mF ceramic capacitor on theoutput. The TPS793xx family uses an advanced, proprietary, BiCMOS fabricaTIon process to yield extremely lowdropout voltages (e.g., 112 mV at 200 mA, TPS79330). Each device achieves fast start-up times (approximately50 ms with a 0.001-mF bypass capacitor), while consuming very low quiescent current (170 mA typical). Moreover,when the device is placed in standby mode, the supply current is reduced to less than 1 mA. The TPS79328exhibits approximately 32 mVRMS of output voltage noise with a 0.1-mF bypass capacitor. Applications with analogcomponents that are noise sensitive, such as portable RF electronics, benefit from the high PSRR and low-noisefeatures, as well as the fast response time.
