TPS79628DCQ Datasheet | Texas Instruments

Features - 1 1-A Low-Dropout Regulator With Enable - Available in Fixed and Adjustable (1.2 V to 5.5 V) Versions - High PSRR (53 d B at 10 k Hz) - Ultralow-Noise (40 μVRMS, TPS79630) - Fast Start-Up Time (50 μs) - Stable With a 1-μF Ceramic Capacitor - Excellent Load and Line Transient Response - Very Low Dropout Voltage (250 m V at Full Load, TPS79630) - 3 × 3 VSON Power PAD™, SOT223-6, and TO-263 Packages 2 Applications - RF: VCOs, Receivers, ADCs - Audio - Bluetooth®, Wireless LAN - Cellular and Cordless Telephones - Handheld Organizers, PDAs Ripple Rejection vs Frequency TPS79630 IOUT = 1 m A VIN = 4 V COUT = 10 m F CNR = 0.01 m F 50 IOUT = 1 A 10 100 1 k 10 k 100 k 1 M 10 M Frequency (Hz) 3 Description The TPS796 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, 3 × 3 VSON, SOT223-6, and TO-263 packages. Each device in the family is stable with a small, 1-μF ceramic capacitor on the output. The family uses an advanced, proprietary Bi CMOS fabrication process to yield extremely low dropout voltages (for example, 250 m V at 1 A). 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 TPS79630 exhibits approximately 40 μVRMS of output voltage noise at 3.0-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, low noise features , and need fast response time. Device Information(1) PART...