Description

The TPS7A47 is a family of positive voltage (+36 V). ultra low-noise (4 VRMs) low-dropout linear regulators (LDO) capable of sourcing a 1-A load.The TPS7A4700 output voltages are user-programmable (up to 20.5 V) using a printed circuitboard (PCB) layout without the need of externalresistors or feed-forward capacitors, thus reducingoverall component count.

The TPS7A4701 output voltage can be configured with a user-programmable PCB layout (up to 20.5 V).or adjustable (up to 34 V) with external feed back resistors.

The TPS7A47 is designed with bipolar technology primarily high-accuracy，high-precision for instrumentation applications where clean voltage rails are critical to maximize system performance. This feature makes the device ideal for powering operational amplifiers, analog-to-digital converters(ADCs)， digital-to-analog converters (DACs)， and other high-performance analog circuitry in critical applications such as medical, radio frequency (RF), and test-and-measurement.

In addition, the TPS7A47 is ideal for post dc-dc converter regulation. By filtering out the output voltage dc-dc ripple inherent to switching conversions,maximum system performance is ensured in sensitive instrumentation, test-and-measurement, audio, and RF applications.

For applications where positive and negative low-noise rails are required, consider TI's TPS7A33 family of negative high-voltage, ultralow-noise linear regulators.

Features

•     lnput Voltage Range: +3 V to +36 V

•     Output Voltage Noise:4 pVRMs (10 Hz, 100 kHz)

•     Power-Supply Ripple Rejection:

• 82 dB (100 Hz)

• 55 dB (10 HZ, 10 MHZ)

•     Two Output Voltage Modes:

•         - ANY-OUTTM Version (User-ProgrammableOutput via PCB Layout):

•         - No External Feedback Resistors or Feed. Forward Capacitors Required

•         - Output Voltage Range: +1.4 V to +20.5 V

•     Adjustable Version (TPS7A4701 only):

•         - Output Voltage Range: +1.4 V to +34 V

•     Output Current: 1 A

•     Dropout Voltage: 307 mV at 1 A

•     CMOS Logic Level-Compatible Enable Pin

•     Built-In Fixed Current Limit andThermal Shutdown

•     Available in High-Performance Thermal Package5-mm x 5-mm QFN

•     Operating Temperature Range:-40°C to 125°C

Applications

•     Voltage-Controlled Oscillators (VCO)

•     Frequency Synthesizers

•     Test and Measurement

•     Instrumentation, Medical, and Audio

•     RX, TX, and PA Circuitry

•     Supply Rails for Operational Amplifiers,DACs, ADCs, and Other High-Precision AnalogCircuitry

•     Post DC-DC Converter Regulation andRipple Filtering

•     Base Stations and Telecom Infrastructure

•     +12-V and +24-V Industrial Buses

TPS7A470x Datasheet Download