TPS78618DCQRG4 Description
The TPS786xx family of low-dropout (LDO) low-power linear voltage regulators features a high power supply rejection ratio (PSRR), ultralow noise, fast start-up， and excellent line and load transient responses in small outline, SOT223-6, and 5-pin DDPAK 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 (e.g. 390 mV at 1.5 A). Each device achieves fast start-up times (approximately 50 μs with a 0.001 μF bypass capacitor) while consuming shallow 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 TPS78630 exhibits approximately 48 μVRMS output voltage at 3.0 V output noise 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， low noise features, and fast response time.
TPS78618DCQRG4 Features
1.5 A Low-Dropout Regulator With Enable
Available in 1.8-V, 2.5-V, 2.8-V, 3-V, 3.3-V, and
Adjustable (1.2-V to 5.5-V)
High PSRR (49 dB at 10 kHz)
Ultralow Noise (48 μVRMS, TPS79630)
Fast Start_Up Time (50 us)
Stable With a 1_μF Ceramic Capacitor
Excellent L oad/L in Transient Response
Very Low Dropout Voltage (390 mV at Full
Load, TPS78630)
6-Pin SOT223-6 and 5-Pin DDPAK Package
TPS78618DCQRG4 Applications
RF: VCOs, Receivers, ADCs
Audio
Bluetooth, Wireless L AN
Cellular and Cordless Telephones
Handheld Organizers, PDAs
