TPS79533DCQR

The TPS795 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, 6-pin SOT-223 and 3–mm × 3–mm WSON 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 device exhibits approximately 33 μV_RMS of output voltage noise at 3-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.

Applications

• RF: VCOs, Receivers, ADCs
• Audio
• Bluetooth, Wireless LAN
• Cellular and Cordless Telephones
• Handheld Organizers, PDAs

Key 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 μV_RMS, TPS79530)
• Fast Start-Up Time (50 μs)
• Stable With a 1-μF Ceramic Capacitor
• Excellent Load and Line Transient Response
• Low Dropout Voltage (110 mV at Full Load, TPS79530)
• 6-Pin SOT-223 and 3 mm × 3 mm WSON Packages