TPS7A47 Datasheet, PDF (1/23 Pages) Texas Instruments – 36-V, 1-A, 4.17-μVRMS, RF LDO Voltage Regulator

TPS7A47
www.ti.com
SBVS204A – JUNE 2012 – REVISED JULY 2012
36-V, 1-A, 4.17-µV_RMS, RF LDO Voltage Regulator
FEATURES
1
•23 Input Voltage Range: +3 V to +36 V
• Output Voltage Noise
– 4.17 µV_RMS (10 Hz, 100 kHz)
• Power-Supply Ripple Rejection:
– 82 dB (100 Hz)
– ≥ 55 dB (10 Hz, 10 MHz)
• ANY-OUT™ (User-Adjustable Output via
PCB Layout):
– No External Resistors or Feed-Forward
Capacitors Required
– Output Voltage Range: +1.4 V to +20.5 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 Thermal Performance
Package:
– 5-mm × 5-mm QFN
• Operating Temperature Range:
–40°C to +125°C
APPLICATIONS
• Voltage-Controlled Oscillators (VCO)
• Frequency Synthesizers
• Test and Measurement Applications
• Medical Applications
• RX, TX, and PA Circuitry
• Supply Rails for Operational Amplifiers,
DACs, ADCs, and Other High-Precision Analog
Circuitry
• Audio Applications
• Post DC/DC Converter Regulation and
Ripple Filtering
• Industrial Instrumentation
• Base Stations and Telecom Infrastructure
• +12-V and +24-V Industrial Buses
DESCRIPTION
The TPS7A47 is a positive voltage (+36 V), ultralow-
noise (4.17 µV_RMS) linear regulator capable of
sourcing a 1-A load.
In addition, the TPS7A47 output voltage is fully user-
adjustable via a printed circuit board (PCB) layout
without the need of external resistors or feed-forward
capacitors, thus reducing overall component count.
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, 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.
TPS7A47
RF LDO
Amplifier
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
ANY-OUT, PowerPAD are trademarks of Texas Instruments.
2
All other trademarks are the property of their respective owners.
3
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012, Texas Instruments Incorporated