TPS79401DCQR Datasheet | Texas Instruments

FEATURES - 250-m A Low-Dropout Regulator With Enable - Available in Fixed and Adjustable (1.2 V to 5.5 V) Versions - High PSRR (60 d B at 10 k Hz) - Ultralow Noise (32 µVrms, TPS79428) - Fast Start-Up Time (50 µs) - Stable With a 2.2-µF Ceramic Capacitor - Excellent Load/Line Transient Response - Very Low Dropout Voltage (155 m V at Full Load) - Available in MSOP-8 and SOT223-6 Packages APPLICATIONS - RF: VCOs, Receivers, ADCs - Audio - Bluetooth™, Wireless LAN - Cellular and Cordless Telephones - Handheld Organizers, PDAs DESCRIPTION The TPS794xx family of low-dropout (LDO) 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, MSOP-8 Power PAD™ and SOT223-6 packages. Each device in the family is stable with a small 2.2-µF ceramic capacitor on the output. The family uses an advanced, proprietary Bi CMOS fabrication process to yield extremely low dropout voltages (for example, 155 m V at 250 m A). Each device achieves fast start-up times (approximately 50 µs with a 0.001-µF bypass capacitor) while consuming low quiescent current (170 µA typical). Moreover, when the device is placed in standby mode, the supply current is reduced to less than 1 µA. The TPS79428 exhibits approximately 32 µVRMS of output voltage noise at 2.8 V output with a 0.1-µF bypass capacitor. Applications with analog ponents that are noise-sensitive, such as portable RF electronics, benefit from the high PSRR and low noise features as well as the fast response time. DGN PACKAGE MSOP-8 Power PADt (TOP VIEW) - No internal connection DCQ PACKAGE SOT223-6 (TOP VIEW) NR/FB 6 GND Ripple Rejection (d B) Output Spectral Noise Density (µV/√Hz) TPS79433 RIPPLE REJECTION vs FREQUENCY IOUT = 10 m A 70 IOUT = 250 m...