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Linear & low-dropout (LDO) regulators

TPS7A84

ACTIVE

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

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Data sheet

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Drop-in replacement with upgraded functionality 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 3-A LDO with improved accuracy 0.75%. This is an improved pin-to-pin upgrade.
Similar functionality to the compared device
TPS7A88 ACTIVE 1-A, low-noise, high-PSRR, dual-channel adjustable ultra-low-dropout voltage regulator Dual-channel, low noise, 1-A LDO.

TPS7A84

ACTIVE
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Product details

Output options Adjustable Output, Fixed Output Iout (max) (A) 3 Vin (max) (V) 6.5 Vin (min) (V) 1.1 Vout (max) (V) 5 Vout (min) (V) 0.8 Rating Catalog Noise (µVrms) 4.4 PSRR at 100 KHz (dB) 25 Iq (typ) (mA) 2.8 Thermal resistance θJA (°C/W) 35.4 Load capacitance (min) (µF) 47 Regulated outputs (#) 1 Features Enable, Output discharge, Power good, Soft start Accuracy (%) 1 Dropout voltage (Vdo) (typ) (mV) 110 Operating temperature range (°C) -40 to 125
Output options Adjustable Output, Fixed Output Iout (max) (A) 3 Vin (max) (V) 6.5 Vin (min) (V) 1.1 Vout (max) (V) 5 Vout (min) (V) 0.8 Rating Catalog Noise (µVrms) 4.4 PSRR at 100 KHz (dB) 25 Iq (typ) (mA) 2.8 Thermal resistance θJA (°C/W) 35.4 Load capacitance (min) (µF) 47 Regulated outputs (#) 1 Features Enable, Output discharge, Power good, Soft start Accuracy (%) 1 Dropout voltage (Vdo) (typ) (mV) 110 Operating temperature range (°C) -40 to 125
VQFN (RGR) 20 12.25 mm² 3.5 x 3.5
  • 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
  • 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

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.

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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TPS74401 ACTIVE 3-A, low-VIN (0.8-V), low-noise, high-PSRR, adjustable ultra-low-dropout voltage regulator An alternative 3-A LDO.

Technical documentation

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* Data sheet TPS7A84 High-Current (3 A), High-Accuracy (1%), Low-Noise (4.4 µVRMS), LDO Voltage Regulator datasheet (Rev. B) PDF | HTML 23 Jun 2021
Technical article 如何以低雜訊和低漣波設計技術強化電源與訊號完整性 PDF | HTML 04 Oct 2024
Technical article 저잡음 및 저리플 설계 기술로 전력 및 신호 무결성을 향상시키는 방법 PDF | HTML 04 Oct 2024
Technical article How to enhance power and signal integrity with low noise and low ripple design techniques PDF | HTML 25 Sep 2024
White paper Parallel LDO Architecture Design Using Ballast Resistors PDF | HTML 14 Dec 2022
White paper Comprehensive Analysis and Universal Equations for Parallel LDO's Using Ballast PDF | HTML 13 Dec 2022
Analog Design Journal Clutter‐free power supplies for RF converters in radar applications (Part 1)  18 Mar 2021
Selection guide Low Dropout Regulators Quick Reference Guide (Rev. P) 21 Mar 2018
Technical article Optimizing LDO voltage accuracy PDF | HTML 06 May 2016
EVM User's guide TPS7A84EVM-753 Evaluation Module 29 Feb 2016

Design & development

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

Evaluation board

TPS7A84EVM-753 — TPS7A84 3-A high-current, 1% high-accuracy, 4.4-μVRMS LDO regulator evaluation module

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 (...)
User guide: PDF
Not available on TI.com
Simulation model

TPS7A84 PSpice Transient Model

SBVM575.ZIP (76 KB) - PSpice Model
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Simulation model

TPS7A84 Unencrypted PSpice Transient Model

SBVM574.ZIP (3 KB) - PSpice Model
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Calculation tool

PARALLEL-LDO-CALC — Parallel low-dropout (LDO) calculator

The parallel low-dropout (LDO) calculator is a Microsoft® Excel®-based tool that provides worst-case analysis for parallel LDO regulators using ballast resistors. The tool helps the user identify the minimum number of parallel LDO regulators required and optimum ballast resistance for a (...)

Supported products & hardware

Supported products & hardware

Products
Linear & low-dropout (LDO) regulators
TPS7A33 — 1-A, high-PSRR, negative, adjustable low-dropout voltage regulator with enable TPS7A47 — 1-A, 36-V, low-noise, high-PSRR, low-dropout voltage regulator with enable TPS7A47-Q1 — Automotive 1-A, 36-V, low-noise, high-PSRR, low-dropout voltage regulator with enable TPS7A4701-EP — Enhanced product, 36-V, 1-A, 4-μVRMS, RF LDO voltage regular TPS7A52 — 2-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout (LDO) voltage regulator TPS7A52-Q1 — Automotive 2-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout (LDO) voltage regulator TPS7A53 — 3-A, low-VIN (1.1 V) low-noise high-accuracy ultra-low-dropout (LDO) voltage regulator TPS7A53-Q1 — Automotive, 3-A, low-VIN (1.1 V) low-noise high-accuracy ultra-low-dropout (LDO) voltage regulator TPS7A53A-Q1 — Automotive, 3-A, low-VIN 5.6-µVRMS low-noise high-accuracy ultra-low dropout voltage regulator TPS7A53B — 3-A, 1.1-V, low-VIN, low-noise high-accuracy ultra-low-dropout voltage regulator with 0.5-V low VREF TPS7A54 — 4-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout (LDO) voltage regulator TPS7A54-Q1 — Automotive 4-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout (LDO) voltage regulator TPS7A57 — 5-A, low-input-voltage, low-noise, high-accuracy low-dropout (LDO) voltage regulator TPS7A83A — 2-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout voltage regulator with power good TPS7A84A — 3-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout voltage regulator with power good TPS7A85A — 4-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout voltage regulator with power good TPS7A94 — 1-A, ultra-low noise, ultra-high PSRR, RF voltage regulator TPS7B7702-Q1 — Automotive 300-mA, off-battery (40-V), dual-channel adjustable antenna low-dropout voltage regulator TPS7A8300 — 2-A, low-VIN, low-2-A, low-VIN, low-noise, ultra-low-dropout voltage regulator with power good wi TPS7A84 — 3-A, low-VIN, low-noise, ultra-low-dropout voltage regulator with power good with high-accuracy TPS7A85 — 4-A, low-VIN, low-noise, ultra-low-dropout voltage regulator with power good with high-accuracy TPS7A96 — 2-A, ultra-low noise ultra-high PSRR RF voltage regulator TPS7A4501-SP — Radiation-hardened, QMLV, 1.5-V to 20-V input 1.5-A low-dropout (LDO) regulator TPS7H1111-SP — Radiation-hardened, QMLV and QMLP, 1.5A ultra-low-noise high-PSRR low-dropout (LDO) regulator TPS7H1111-SEP — Radiation-tolerant, 1.5A, ultra-low-noise ultra-high-PSRR RF LDO regulator TPS7A90 — 500-mA, low-noise, high-PSRR, adjustable ultra-low-dropout voltage regulator with high-accuracy TPS7A91 — 1-A, low-noise, high-PSRR, adjustable ultra-low-dropout voltage regulator with high-accuracy TPS7A92 — 2-A, low-noise, high-PSRR, adjustable ultra-low-dropout voltage regulator with high-accuracy
Hardware development
Evaluation board
TPS7A57EVM-081 — TPS7A57 evaluation module for 5-A low-noise high-accuracy low-dropout (LDO) voltage regulator
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Reference designs

TIDA-01466 — Low-Voltage, Low-Noise Power-Supply Reference Design for Ultrasound Front End

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 (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01022 — Flexible 3.2-GSPS multi-channel AFE reference design for DSOs, radar and 5G wireless test systems

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 (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01027 — Low-noise power supply reference design maximizing performance in 12.8-GSPS data acquisition systems

This reference design demonstrates an efficient, low-noise five-rail power supply design for very high-speed Data Acquisition (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 (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01028 — 12.8-GSPS analog front end reference design for high-speed oscilloscope and wide-band digitizer

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 done by time interleaving two RF-sampling ADCs. Interleaving requires a phase shift between the ADCs, which this reference design achieves (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-010128 — Scalable 20.8 GSPS reference design for 12 bit digitizers

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 (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-010122 — Reference design synchronizing data converter DDC and NCO features for multi-channel RF systems

This reference design addresses 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), mixer, local (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01232 — High-Current Low-Noise Parallel LDO Reference Design

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 (...)
Design guide: PDF
Schematic: PDF
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VQFN (RGR) 20 Ultra Librarian
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