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TPS7A84 Datasheet Preview

TPS7A84 Datasheet

Low-Noise LDO Voltage Regulator

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TPS7A84
SBVS233A – JANUARY 2016 – REVISED JANUARY 2016
TPS7A84 High-Current (3 A), High-Accuracy (1%),
Low-Noise (4.4 µVRMS), LDO Voltage Regulator
1 Features
1 Low Dropout: 180 mV (max) at 3 A
• 1% (max) Accuracy Over Line, Load, and
Temperature
• Output Voltage Noise:
– 4.4 µVRMS at 0.8-V Output
– 7.7 µVRMS at 5.0-V Output
• Input Voltage Range:
– Without BIAS: 1.4 V to 6.5 V
– With BIAS: 1.1 V to 6.5 V
• ANY-OUT™ Operation:
– Output Voltage Range: 0.8 V to 3.95 V
• Adjustable Operation:
– Output Voltage Range: 0.8 V to 5.0 V
• Power-Supply Ripple Rejection:
– 40 dB at 500 kHz
• Excellent Load Transient Response
• Adjustable Soft-Start In-Rush Control
• Open-Drain Power-Good (PG) Output
• Stable with a 47-µF or Larger Ceramic Output
Capacitor
• 3.5-mm × 3.5-mm, 20-Pin VQFN
2 Applications
3 Description
The TPS7A84 is a low-noise (4.4 µVRMS), 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 5.0 V using an external
resistor divider.
The combination of low-noise (4.4 µVRMS), high-
PSRR, and high output current capability makes the
TPS7A84 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 TPS7A84
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
5.0-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 load and temperature), remote sensing,
excellent transient performance, and soft-start
capabilities of the TPS7A84 ensure optimal system
performance.
• 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
The versatility of the TPS7A84 makes the device a
component of choice for many demanding
applications.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (nom)
TPS7A84
VQFN (20)
3.50 mm × 3.50 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Powering RF Components
TPS7A84
Powering Digital Loads
Bias Supply
Input Supply
IN
OUT
PG
VCC
EN
IQ Modulators
TRF372017
TRF3722
VCC
IQ Demodulators
TRF371125
TRF371135
Input Supply
EN Signal
BIAS
IN
TPS7A84 OUT
EN
PG
GPIO
VDD
DSP,
ASIC,
FPGA
C6000
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.




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TPS7A84 Datasheet Preview

TPS7A84 Datasheet

Low-Noise LDO Voltage Regulator

No Preview Available !

TPS7A84
SBVS233A – JANUARY 2016 – REVISED JANUARY 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configurations and Functions ....................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 5
6.5 Electrical Characteristics........................................... 5
6.6 Typical Characteristics .............................................. 7
7 Detailed Description ............................................ 14
7.1 Overview ................................................................. 14
7.2 Functional Block Diagram ....................................... 15
7.3 Feature Description................................................. 16
7.4 Device Functional Modes........................................ 18
8 Application and Implementation ........................ 19
8.1 Application Information............................................ 19
8.2 Typical Applications ................................................ 30
9 Power-Supply Recommendations...................... 33
10 Layout................................................................... 33
10.1 Layout Guidelines ................................................. 33
10.2 Layout Example .................................................... 34
11 Device and Documentation Support ................. 35
11.1 Device Support...................................................... 35
11.2 Documentation Support ........................................ 35
11.3 Community Resources.......................................... 35
11.4 Trademarks ........................................................... 35
11.5 Electrostatic Discharge Caution ............................ 36
11.6 Glossary ................................................................ 36
12 Mechanical, Packaging, and Orderable
Information ........................................................... 36
4 Revision History
Changes from Original (January 2016) to Revision A
Page
• Released to production .......................................................................................................................................................... 1
2 Submit Documentation Feedback
Product Folder Links: TPS7A84
Copyright © 2016, Texas Instruments Incorporated


Part Number TPS7A84
Description Low-Noise LDO Voltage Regulator
Maker etcTI
Total Page 30 Pages
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