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Linear & low-dropout (LDO) regulators

TPS7A57

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5-A, low-input-voltage, low-noise, high-accuracy low-dropout (LDO) voltage regulator

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Data sheet

TPS7A57

ACTIVE
Data sheet Order now

Product details

Output options Adjustable Output Iout (max) (A) 5 Vin (max) (V) 6 Vin (min) (V) 0.7 Vout (max) (V) 5.2 Vout (min) (V) 0.5 Rating Catalog Noise (µVrms) 2.1 PSRR at 100 KHz (dB) 60 Iq (typ) (mA) 5 Thermal resistance θJA (°C/W) 40.3 Load capacitance (min) (µF) 15 Regulated outputs (#) 1 Features Adjustable current limit, Enable, Foldback Overcurrent protection, Output discharge, Power good, Soft start Accuracy (%) 1 Dropout voltage (Vdo) (typ) (mV) 75 Operating temperature range (°C) -40 to 125
Output options Adjustable Output Iout (max) (A) 5 Vin (max) (V) 6 Vin (min) (V) 0.7 Vout (max) (V) 5.2 Vout (min) (V) 0.5 Rating Catalog Noise (µVrms) 2.1 PSRR at 100 KHz (dB) 60 Iq (typ) (mA) 5 Thermal resistance θJA (°C/W) 40.3 Load capacitance (min) (µF) 15 Regulated outputs (#) 1 Features Adjustable current limit, Enable, Foldback Overcurrent protection, Output discharge, Power good, Soft start Accuracy (%) 1 Dropout voltage (Vdo) (typ) (mV) 75 Operating temperature range (°C) -40 to 125
WQFN (RTE) 16 9 mm² 3 x 3
  • Input voltage range:
    • Without BIAS: 1.1 V to 6.0 V
    • With BIAS: 0.7 V to 6.0 V
  • Output voltage noise: 2.45 µVRMS
  • 1% (max) accuracy over line, load, and temperature
  • Low dropout: 75 mV at 5 A
  • Power-supply rejection ratio (5 A):
    • 100 dB at 1 kHz
    • 78 dB at 10 kHz
    • 60 dB at 100 kHz
    • 36 dB at 1 MHz
  • Superior load transient response:
    • ±2 mV with a 100-mA to 5-A load step
  • Adjustable output voltage range: 0.5 V to 5.2 V
  • Adjustable soft-start inrush control
  • BIAS rail:
    • Internal charge pump or 3-V to 11-V external rail
    • Internal charge pump can be disabled
  • Open-drain, power-good (PG) output
  • Package: 3-mm × 3-mm, 16-pin WQFN
    • EVM RθJA: 21.9°C/W
  • Input voltage range:
    • Without BIAS: 1.1 V to 6.0 V
    • With BIAS: 0.7 V to 6.0 V
  • Output voltage noise: 2.45 µVRMS
  • 1% (max) accuracy over line, load, and temperature
  • Low dropout: 75 mV at 5 A
  • Power-supply rejection ratio (5 A):
    • 100 dB at 1 kHz
    • 78 dB at 10 kHz
    • 60 dB at 100 kHz
    • 36 dB at 1 MHz
  • Superior load transient response:
    • ±2 mV with a 100-mA to 5-A load step
  • Adjustable output voltage range: 0.5 V to 5.2 V
  • Adjustable soft-start inrush control
  • BIAS rail:
    • Internal charge pump or 3-V to 11-V external rail
    • Internal charge pump can be disabled
  • Open-drain, power-good (PG) output
  • Package: 3-mm × 3-mm, 16-pin WQFN
    • EVM RθJA: 21.9°C/W

The TPS7A57 is a low-noise (2.45 µVRMS), ultra-low-dropout linear regulator (LDO) capable of sourcing 5 A with only 75 mV of dropout, independently of the output voltage. The device output voltage is adjustable from 0.5 V to 5.2 V using a single external resistor. The combination of low noise, high PSRR (36 dB at 1 MHz), and high output-current capability makes the TPS7A57 designed for powering noise-sensitive components (such as RF amplifiers, radar sensors, SERDES and analog chipsets) found in radar power, communication, and imaging applications.

Digital loads [such as application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), and digital signal processors (DSPs)] requiring low-input, low-output (LILO) voltage operation also benefit from the exceptional accuracy (1% over load, line, and temperature), remote sensing, excellent transient performance, and soft-start capabilities to provide optimal system performance. The versatility, performance, and small footprint solution make this LDO an excellent choice for high-current analog loads such as analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and imaging sensors as well as digital loads such as serializer/deserializers (SerDes), FPGAs, and DSPs.

The TPS7A57 is a low-noise (2.45 µVRMS), ultra-low-dropout linear regulator (LDO) capable of sourcing 5 A with only 75 mV of dropout, independently of the output voltage. The device output voltage is adjustable from 0.5 V to 5.2 V using a single external resistor. The combination of low noise, high PSRR (36 dB at 1 MHz), and high output-current capability makes the TPS7A57 designed for powering noise-sensitive components (such as RF amplifiers, radar sensors, SERDES and analog chipsets) found in radar power, communication, and imaging applications.

Digital loads [such as application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), and digital signal processors (DSPs)] requiring low-input, low-output (LILO) voltage operation also benefit from the exceptional accuracy (1% over load, line, and temperature), remote sensing, excellent transient performance, and soft-start capabilities to provide optimal system performance. The versatility, performance, and small footprint solution make this LDO an excellent choice for high-current analog loads such as analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and imaging sensors as well as digital loads such as serializer/deserializers (SerDes), FPGAs, and DSPs.
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Technical documentation

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* Data sheet TPS7A57 5-A, Low-VIN (0.7 V), Low-Noise (2.1 μVRMS), High-Accuracy (1%), Ultra-Low Dropout (LDO) Voltage Regulator datasheet PDF | HTML 14 Jul 2022
White paper Demystifying LDO Turn-On (startup) Time PDF | HTML 05 Oct 2024
Circuit design Voltage Margining and Scaling Circuit with a Voltage Output Smart DAC (Rev. A) PDF | HTML 17 Apr 2024
Circuit design Voltage Margining and Scaling Circuit With Current Output Smart DAC (Rev. A) PDF | HTML 16 Apr 2024
Certificate TPS7A57EVM-081 EU RoHS Declaration of Conformity (DoC) 09 Jan 2023
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

Design & development

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

Evaluation board

TPS7A57EVM-056 — TPS7A57 evaluation module for 5-A, low-VIN, low-noise, high-accuracy LDO voltage regulator

The TPS7A57 evaluation module (EVM) helps design engineers evaluate the operation and performance of the TPS7A57 linear regulator for possible use in their own circuit application. This EVM configuration contains a single low-noise, high-accuracy, linear regulator for a wide range of applications. (...)

User guide: PDF | HTML
Not available on TI.com
Evaluation board

TPS7A57EVM-081 — TPS7A57 evaluation module for 5-A low-noise high-accuracy low-dropout (LDO) voltage regulator

The TPS7A57EVM-081 evaluation module (EVM) is a platform for developing the TPS7A57, which is a low-noise, low-dropout (LDO) linear regulator. The TIDA-050061 reference design showcases the TPS7A57 in a parallel configuration using ballast resistors, which is capable of sourcing 13 A.

A (...)

Not available on TI.com
Simulation model

TPS7A57 PSpice Transient Model

SBVM989.ZIP (31 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
Hardware development
Evaluation board
TPS7A57EVM-081 — TPS7A57 evaluation module for 5-A low-noise high-accuracy low-dropout (LDO) voltage regulator
Download
Reference designs

TIDA-050061 — Scalable, high-current, low-noise parallel low-dropout (LDO) reference design

The TIDA-050061 parallel low-dropout (LDO) reference design showcases the TPS7A57 low-noise LDO linear regulator in a parallel configuration using ballast resistors, which is capable of sourcing 13 A. A high-performance load-transient circuit is included to assist the user with high-speed (...)
Design guide: PDF
Package Pins CAD symbols, footprints & 3D models
WQFN (RTE) 16 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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