TPS7A4700_14 Datasheet, PDF (1/31 Pages) Texas Instruments – 36-V, 1-A, 4-VRMS, RF LDO Voltage Regulator

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TPS7A4700, TPS7A4701
SBVS204F – JUNE 2012 – REVISED SEPTEMBER 2014
TPS7A470x 36-V, 1-A, 4-µV_RMS, RF LDO Voltage Regulator
1 Features
•1 Input Voltage Range: +3 V to +36 V
• Output Voltage Noise:
4 µV_RMS (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
2 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 µV_RMS) 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-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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS7A470x
VQFN (20)
5 mm × 5 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
TPS7A47xx
RF LDO
Amplifier
TPS7A33
Negative-Voltage
Regulator
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.