TPS78618

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TPS786 SLVS389M – SEPTEMBER 2002 – REVISED SEPTEMBER 2015 TPS786 Ultralow-Noise, High-PSRR, Fast, RF, 1.5-A Low-Dropout Linear Regulators Ripple Rejection − (dB) Output Spectral Noise Density (µVÖHz) 1 Features 1 1.5-A Low-Dropout Regulator With Enable Available in Fixed and Adjustable (1.2 V to 5.5 V) Output Versions High PSRR (49 dB at 10 kHz) Ultralow Noise (48 μVRMS, TPS78630) Fast Start-Up Time (50 μs) Stable With a 1-μF Ceramic Capacitor Excellent Load and Line Transient Response Very Low Dropout Voltage (390 mV at Full Load, TPS78630) 3 × 3 SON PowerPAD™, 6-Pin SOT223 and 5-Pin DDPAK Package 2 Applications RF: VCOs, Receivers, ADCs Audio Bluetooth®, Wireless LAN Cellular and Cordless Telephones Handheld Organizers, PDAs Ripple Rejection vs Frequency 80 70 IOUT = 1 mA 60 VIN = 4 V COUT = 10 µF CNR = 0.01 µF 50 IOUT = 1.5 A 40 30 20 10 0 1 10 100 1k 10k 100k 1M 10M f (Hz) 3 Description The TPS786 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 DDPAK-5 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, 390 ...