TPS79518DCQ Datasheet PDF - TI

●DESCRIPTION

●The TPS795xx family of low-dropout (LDO), low-power linear voltage regulators features high power-supply rejection ratio (PSRR), ultralow noise, fast start-up, and excellent line and load transient responses in small outline, SOT223-6 and 3 x 3 SON packages. Each device in the family is stable with a small 1-µF ceramic capacitor on the output. The family uses an advanced, proprietary BiCMOS fabrication process to yield extremely low dropout voltages (for example, 110 mV at 500 mA). Each device achieves fast start-up times (approximately 50 µs with a 0.001-µF bypass capacitor) while consuming very low quiescent current (265 µA, typical). Moreover, when the device is placed in standby mode, the supply current is reduced to less than 1 µA. The TPS79530 exhibits approximately 33 µVRMS of output voltage noise at 3.0 V output with a 0.1-µF bypass capacitor. Applications with analog components that are noise-sensitive, such as portable RF electronics, benefit from the high-PSRR and low-noise features, as well as from the fast response time.

●FEATURES

●• 500-mA Low-Dropout Regulator With Enable

●• Available in Fixed and Adjustable (1.2-V to 5.5-V) Versions

●• High PSRR (50 dB at 10 kHz)

●• Ultralow Noise (33 µVRMS, TPS79530)

●• Fast Start-Up Time (50 µs)

●• Stable With a 1-µF Ceramic Capacitor

●• Excellent Load/Line Transient Response

●• Very Low Dropout Voltage (110 mV at Full Load, TPS79530)

●• 6-Pin SOT223 and 3 × 3 SON Packages

●APPLICATIONS

●• RF: VCOs, Receivers, ADCs

●• Audio

●• Bluetooth®, Wireless LAN

●• Cellular and Cordless Telephones

●• Handheld Organizers, PDAs