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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.