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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) 5.15 Vout (Min) (V) 0.5 Noise (uVrms) 4.4 Iq (Typ) (mA) 2.8 Thermal resistance θJA (°C/W) 43 Load capacitance (Min) (µF) 47 Rating Catalog Regulated outputs (#) 1 Features Enable, Foldback Overcurrent Protection, Output Discharge, Power Good, Soft Start Accuracy (%) 0.75 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 (maximum) at 3 A with BIAS
  • 0.75% (maximum) accuracy over line, load, and temperature with BIAS
  • Output voltage noise: 4.4 µVRMS
  • Input voltage range:
    • Without BIAS: 1.4 V to 6.5 V
    • With BIAS: 1.1 V to 6.5 V
  • TPS7A8400A output voltage range:
    • Adjustable operation: 0.8 V to 5.15 V
    • ANY-OUT™ operation: 0.8 V to 3.95 V
  • TPS7A8401A (preview) output voltage range:
    • Adjustable operation: 0.5 V to 5.15 V
    • ANY-OUT™ operation: 0.5 V to 2.075 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

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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 is offered in two output voltage ranges. The TPS7A8400A output voltage is pin-programmable from 0.8 V to 3.95 V, with a 50-mV resolution, and adjustable from 0.8 V to 5.15 V using an external resistor divider. The TPS7A8401A output voltage is pin-programmable from 0.5 V to 2.075 V, with a 25-mV resolution, and adjustable from 0.5 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.

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Exact equivalent in functionality and parametrics to the compared device:
TPS7A84 ACTIVE 3-A, low-VIN, low-noise, ultra-low-dropout voltage regulator with power good with high-accuracy 3-A LDO regulator with good accuracy (1%) and improved thermal resistance (35.4°C/W).
Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
TPS74401 ACTIVE 3-A, low-VIN (0.8-V), low-noise, high-PSRR, adjustable ultra-low-dropout voltage regulator The TPS74401 is a 3-A LDO regulator with a smaller VOUT range (0.8 V to 3.3 V).

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 5
Type Title Date
* Datasheet TPS7A84A 3-A, High-Accuracy (0.75%), Low-Noise (4.4-µVRMS) LDO Regulator datasheet (Rev. B) Jun. 23, 2020
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
Technical articles LDO basics: noise – part 1 Jun. 14, 2017

Design & development

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

Hardware development

EVALUATION BOARD Download
29
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

Design tools & simulation

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

Reference designs

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
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

CAD/CAE symbols

Package Pins Download
VQFN (RGR) 20 View options

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