1 Features
1• Input Voltage Range: +3 V to +36 V
• Output Voltage Noise:
4 μVRMS (10 Hz, 100 kHz)
• Power-Supply Ripple Rejection:
– 82 dB (100 Hz)
– ≥ 55 dB (10 Hz, 10 MHz)
• Two Output Voltage Modes:
– ANY-OUT™ Version (User-Programmable
Output 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 and
Thermal Shutdown
• Available in High-Performance Thermal Package:
5-mm × 5-mm QFN
• Operating Temperature Range:
–40°C to 125°C

and2
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 Analog
Circuitry
• Post DC-DC Converter Regulation and
Ripple Filtering
• Base Stations and Telecom Infrastructure
• +12-V and +24-V Industrial Buses

3 Description
The TPS7A47 is a family of positive voltage (+36 V),
ultralow-noise (4 μVRMS) 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 circuit
board (PCB) layout without the need of external
resistors or feed-forward capacitors, thus reducing
overall 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 feedback
resistors.
The TPS7A47 is designed with bipolar technology
primarily for high-accuracy, high-precision
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 ripple inherent to dc-dc switching
conversions, maximum system performance is ensured in sensitive instrumentation, test-and2
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.