超低噪声，高PSRR ，快速射频500 mA低压降线性稳压器 ULTRALOW-NOISE, HIGH PSRR, FAST RF 500-mA LOW-DROPOUT LINEAR REGULATORS
DESCRIPON
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 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