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TPS7A84

ACTIVE
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3-A, low-VIN, low-noise, ultra-low-dropout voltage regulator with power good with high-accuracy

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3-A, low-VIN, low-noise, ultra-low-dropout voltage regulator with power good with high-accuracy

TPS7A84

ACTIVE
Data sheet Order now

Product details

Parameters

Output options Adjustable Output, Programmable Output Iout (Max) (A) 3 Vin (Max) (V) 6.5 Vin (Min) (V) 1.1 Vout (Max) (V) 5 Vout (Min) (V) 0.8 Noise (uVrms) 4.4 Iq (Typ) (mA) 2.8 Thermal resistance θJA (°C/W) 35 Approx. price (US$) 1.79 | 1ku Load capacitance (Min) (µF) 47 Rating Catalog Regulated outputs (#) 1 Features Enable, Output Discharge, Power Good, Soft Start Accuracy (%) 1 PSRR @ 100 KHz (dB) 25 Dropout voltage (Vdo) (Typ) (mV) 110 Operating temperature range (C) -40 to 125 open-in-new Find other Linear regulators (LDO)

Package | Pins | Size

VQFN (RGR) 20 12 mm² 3.5 x 3.5 open-in-new Find other Linear regulators (LDO)

Features

  • 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&trde; 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
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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.

The versatility of the TPS7A84 makes the device a component of choice for many demanding applications.

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Exact equivalent in functionality and parametrics to the compared device:
TPS7A84A ACTIVE 3-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout voltage regulator with power good The TPS7A84A is a 3A LDO with improved accuracy 0.75%. This is an improved P2P upgrade to TPS7A84
Similar but not functionally equivalent to the compared device:
TPS74401 ACTIVE 3-A, low-VIN (0.8-V), low-noise, high-PSRR, adjustable ultra-low-dropout voltage regulator TPS74401 is an alternative 3-A LDO.
TPS7A88 ACTIVE 1-A, low-noise, high-PSRR, dual-channel adjustable ultra-low-dropout voltage regulator TPS7A88 is a dual-channel, low noise, 1-A LDO.

Technical documentation

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Type Title Date
* Datasheet TPS7A84 High-Current (3 A), High-Accuracy (1%), Low-Noise (4.4 µVRMS), LDO Voltage Regulator datasheet (Rev. A) Jan. 08, 2016
Technical articles LDO basics: capacitor vs. capacitance Aug. 01, 2018
Technical articles LDO Basics: Preventing reverse current Jul. 25, 2018
Technical articles LDO basics: introduction to quiescent current Jun. 20, 2018
Selection guides Low Dropout Regulators Quick Reference Guide (Rev. P) Mar. 21, 2018
Technical articles LDO basics: noise – part 1 Jun. 14, 2017
Selection guides TI Components for Aerospace and Defense Guide (Rev. E) Mar. 22, 2017
User guides TPS7A84EVM-753 Evaluation Module Feb. 29, 2016

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$29.00
Description
The TPS7A84EVM-753 evaluation module is designed for a typical configuration to evaluate the operation and performance of the TPS7A84, High-Current 3-A low dropout voltage regulator. The EVM circuit board is configured to be a reference design for engineering applications requiring current to a (...)
Features
  • Low Dropout: 180 mV (max) at 3 A
  • 1% (max) Accuracy Over Line, Load, and Temperature
  • ANY-OUT Output Voltage Range: 0.8 V to 3.95 V
  • Adjustable Output Voltage Range: 0.8 V to 5.0 V
  • High Power-Supply Ripple Rejection: 40 dB at 500 kHz
View details

Design tools & simulation

SIMULATION MODELS Download
SBVM574.ZIP (3 KB) - PSpice Model
SIMULATION MODELS Download
SBVM575.ZIP (76 KB) - PSpice Model

Reference designs

REFERENCE DESIGNS Download
Scalable 20.8 GSPS reference design for 12 bit digitizers
TIDA-010128 — This reference design describes a 20.8 GSPS sampling system using RF sampling analog-to-digital converters (ADCs) in time interleaved configuration. Time interleaving method is a proven and traditional way of increasing sample rate, however, matching individual ADCs offset, gain and sampling time (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Reference design synchronizing data converter DDC and NCO features for multi-channel RF systems
TIDA-010122 — This reference design provides the solution for synchronization design challenges associated with emerging 5G adapted applications like massive multiple input multiple output (mMIMO), phase array RADAR and communication payload. The typical RF front end contains antenna, low noise amplifier (LNA (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
12.8-GSPS analog front end reference design for high-speed oscilloscope and wide-band digitizer
TIDA-01028 — This reference design provides a practical example of interleaved RF-sampling analog-to-digital converters (ADCs) to achieve a 12.8-GSPS sampling rate. This is achieved by time-terleaving two RF-sampling ADCs. Interleaving requires a phase shift between the ADCs, which this reference design achieves (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Low noise power-supply reference design maximizing performance in 12.8 GSPS data acquisition systems
TIDA-01027 — This reference design demonstrates an efficient, low noise 5-rail power-supply design for very high-speed DAQ systems capable of > 12.8 GSPS. The power supply DC/DC converters are frequency synchronized and phase-shifted in order to minimize input current ripple and control frequency content (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Flexible 3.2-GSPS multi-channel AFE reference design for DSOs, radar and 5G wireless test systems
TIDA-01022 — This high speed multi-channel data capture reference design enables optimum system performance. System designers needs to consider critical design parameters like clock jitter and skew for high speed multi-channel clock generation, which affects overall system SNR, SFDR, channel to channel skew and (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Low-Voltage, Low-Noise Power-Supply Reference Design for Ultrasound Front End
TIDA-01466 — This reference design is a power supply optimized specifically for providing power to eight 16-channel receive AFE ICs for ultrasound imaging systems. This design reduces part count while maximizing efficiency by using single-chip DC-DC converter + LDO combo regulators to set the LDO input just (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
High-Current Low-Noise Parallel LDO Reference Design
TIDA-01232 — This parallel low-dropout (LDO) reference design showcases the TPS7A85 low-noise LDO linear regulator in a parallel configuration, which is capable of sourcing 3.5 A per LDO or 7 A per board. Additional design flexibility includes the ability to stack this design to meet the current (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
VQFN (RGR) 20 View options

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