TPS7A84A Datasheet, PDF (1/46 Pages) Texas Instruments – 3-A, High-Accuracy (0.75%), Low-Noise (4.4-uVRMS) LDO Regulator

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TPS7A84A
SBVS291 – APRIL 2017
TPS7A84A 3-A, High-Accuracy (0.75%), Low-Noise (4.4-µV_RMS) LDO Regulator
1 Features
•1 Low Dropout: 180 mV (maximum) at 3 A With
BIAS
• 0.75% (maximum) Accuracy Over Line, Load, and
Temperature With BIAS
• Output Voltage Noise: 4.4 µV_RMS
• Input Voltage Range:
– Without BIAS: 1.4 V to 6.5 V
– With BIAS: 1.1 V to 6.5 V
• Output Voltage Range:
– Adjustable Operation: 0.8 V to 5.15 V
– ANY-OUT™ Operation: 0.8 V to 3.95 V
• Power-Supply Ripple Rejection:
– 40 dB at 500 kHz
• Excellent Load Transient Response
• Adjustable Soft-Start In-Rush Control
• Low Thermal Resistance: R_θJA = 43.4°C/W
• Open-Drain Power-Good (PG) Output
• Create a Custom Design Using the TPS7A84A
With the WEBENCH^® Power Designer
2 Applications
• Digital Loads: SerDes, FPGAs, and DSPs
• Instrumentation, Medical, and Audio
• High-Speed Analog Circuits:
– VCO, ADC, DAC, and LVDS
• Imaging: CMOS Sensors and Video ASICs
• Test and Measurement
3 Description
The TPS7A84A is a low-noise, low-dropout linear
regulator (LDO) capable of sourcing 3 A with only
180-mV of maximum dropout. The device output
voltage is pin-programmable from 0.8 V to 3.95 V and
adjustable from 0.8 V to 5.15 V using an external
resistor divider.
The combination of low-noise, high-PSRR, and high
output-current capability makes the TPS7A84A ideal
to power noise-sensitive components such as those
found in high-speed communications, video, medical,
or test and measurement applications. The high
performance of the TPS7A84A limits power-supply-
generated phase noise and clock jitter, making this
device ideal for powering high-performance serializer
and deserializer (SerDes), analog-to-digital
converters (ADCs), digital-to-analog converters
(DACs), and RF components. Specifically, RF
amplifiers benefit from the high-performance and > 5-
V output capability of the device.
For digital loads [such as application-specific
integrated circuits (ASICs), field-programmable gate
arrays (FPGAs), and digital signal processors
(DSPs)] requiring low-input voltage, low-output (LILO)
voltage operation, the exceptional accuracy (0.75%
over line, load, and temperature), remote sensing,
excellent transient performance, and soft-start
capabilities of the TPS7A84A ensure optimal system
performance.
The versatility of the TPS7A84A makes the device a
component of choice for many demanding
applications.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS7A84A
VQFN (20)
3.50 mm × 3.50 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Diagram
TPS7A8400A
Input Supply
IN
OUT
PG
VCC
EN
IQ Modulators
VCC
IQ Demodulators
TRF372017
TRF3722
TRF371125
TRF371135
Copyright © 2017, Texas Instruments Incorporated
Typical Application Circuit
Bias
Supply
CBIAS
1.2 VIN
CIN
CNR/SS
IN
BIAS
EN
PG
NR/SS
1.6 V
800 mV
400 mV
200 mV
100 mV
50 mV
TPS7A84A
GND
OUT
SNS
FB
RPG
CFF
ANYOUT
Used to set
voltage
COUT
0.9 VOUT
To Digital
Load
Copyright © 2017, Texas Instruments Incorporated
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.