1 Features
1• 200-mA RF Low-Dropout Regulator
With Enable
• Available in Fixed Voltages from 1.8 V to 3.3 V
and Adjustable Voltages (1.22 V to 5.5 V)
• High PSRR (68 dB at 100 Hz)
• Low Noise (33 μVRMS, TPS73018)
• Fast Start-Up Time (50 μs)
• Stable With a 2.2-μF Ceramic Capacitor
• Excellent Load/Line Transient Response
• Very Low Dropout Voltage (120 mV at 200 mA)
• 5- and 6-Pin SOT-23 (DBV), and Wafer Chip
Scale (YZQ) Packages

2 Applications
• RF: VCOs, Receivers, ADCs
• Audio
• Cellular and Cordless Telephones
• Bluetooth®, Wireless LAN
• Handheld Organizers, PDAs

3 Description
The TPS730 family of low-dropout (LDO) low-power
linear voltage regulators features high power-supply
rejection ratio (PSRR), low noise, fast start-up, and
excellent line and load transient responses in a small
SOT-23 package. NanoStar™ packaging gives an
ultrasmall footprint as well as an ultralow profile and
package weight, making it ideal for portable
applications such as handsets and PDAs. Each
device in the family is stable, with a small, 2.2-μF
ceramic capacitor on the output. The TPS730 family
uses an advanced, proprietary BiCMOS fabrication
process to yield low dropout voltages (for example, 120 mV at 200 mA, TPS73030). 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 TPS73018 exhibits approximately 33 μVRMS of output voltage
noise at 1.8 V output with a 0.01-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 the fast response time.