TPS79428DGNTG4 Description

The MSOP-8 PowerPAD? and SOT223-6 packages of the TPS79428DGNTG4 low-dropout (LDO) linear voltage regulator offer high power-supply rejection ratio (PSRR), ultralow-noise, quick startup, and outstanding line and load transient responses. A modest 2.2-μF ceramic capacitor on the output of every member of the family stabilizes the gadget. The family produces extremely low dropout voltages with the use of a sophisticated, exclusive BiCMOS production technique (for example, 155 mV at 250 mA). Each device has quick start-up times (about 50 μs with a 0.001-μF bypass capacitor) and typically uses only 170 μA of quiescent current.

Additionally, the supply current is decreased to less than 1 μA when the device is switched to standby mode. With a 0.1-μF bypass capacitor, the TPS79428 displays output voltage noise of about 32 μVRMS at 2.8 V output. The high PSRR and low noise characteristics, as well as the quick response time, are advantageous for applications with analog components that are noise-sensitive, such as portable RF electronics. 

TPS79428DGNTG4 Features

• Fast Start-Up Time (50 μs)

• Stable With a 2.2-μF Ceramic Capacitor

• Excellent Load/Line Transient Response

• Very Low Dropout Voltage (155 mV at Full Load)

• Available in MSOP-8 and SOT223-6 Packages

• 250-mA Low-Dropout Regulator With Enable

• Available in Fixed and Adjustable (1.2 V to 5.5 V) Versions

• High PSRR (60 dB at 10 kHz)

• Ultralow Noise (32 μVrms)

TPS79428DGNTG4 Applications

• Bluetooth?, Wireless LAN

• Cellular and Cordless Telephones

• Handheld Organizers, PDAs

• RF: VCOs, Receivers, ADCs

• Audio