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Linear & low-dropout (LDO) regulators

TPS7A57

ACTIVE

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

Rating Catalog Vin (max) (V) 6 Vin (min) (V) 0.7 Iout (max) (A) 5 Output options Adjustable Output Vout (max) (V) 5.2 Vout (min) (V) 0.5 Noise (µVrms) 2.45 PSRR at 100 KHz (dB) 60 Iq (typ) (mA) 5 Features Adjustable current limit, Enable, Foldback Overcurrent protection, Output discharge, Power good, Soft start Thermal resistance θJA (°C/W) 40.3 Load capacitance (min) (µF) 15 Regulated outputs (#) 1 Accuracy (%) 1 Dropout voltage (Vdo) (typ) (mV) 75 Operating temperature range (°C) -40 to 125
Rating Catalog Vin (max) (V) 6 Vin (min) (V) 0.7 Iout (max) (A) 5 Output options Adjustable Output Vout (max) (V) 5.2 Vout (min) (V) 0.5 Noise (µVrms) 2.45 PSRR at 100 KHz (dB) 60 Iq (typ) (mA) 5 Features Adjustable current limit, Enable, Foldback Overcurrent protection, Output discharge, Power good, Soft start Thermal resistance θJA (°C/W) 40.3 Load capacitance (min) (µF) 15 Regulated outputs (#) 1 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: 1.1V to 6.0V
    • With BIAS: 0.7V to 6.0V
    • Enables LILO operations for sub-1V core voltage
  • Adjustable output voltage range: 0.5V to 5.2V
    • Set with a single external resistor (RREF)
    • VOUT = IREF × RREF
    • Unity-gain architecture maintains low noise across entire range
  • Output voltage noise: 2.45µVRMS (10Hz-100kHz, CNR/SS = 4.7µF)
    • Noise does not scale with VOUT
  • 1% (max) accuracy over line, load, and temperature
  • Low dropout: 75mV at 5A
    • Dropout independent of VOUT
  • Power-supply rejection ratio (5A):
    • 100dB at 1kHz
    • 78dB at 10kHz
    • 60dB at 100kHz
    • 36dB at 1MHz ← Industry-leading for high current LDO
  • Load transient response:
    • ±2mV with a 100mA to 5A load step
    • Fast response due to high loop bandwidth (≅1MHz)
  • Programmable soft-start: using CNR/SS
    • Dual function - inrush control + noise filtering
  • BIAS rail flexibility:
    • Internal charge pump (CP_EN) or 3V to 11V external rail
    • Internal charge pump can be disabled for zero switching noise
  • Power-good indicator (PG): Open-drain output:
    • Threshold: 90% of VOUT
    • Hysteresis: 2%
  • Package: 3mm × 3mm, 16-pin WQFN (RTE)
    • Thermal performance: RθJA: 21.9°C/W (EVM layout)
  • Input voltage range:
    • Without BIAS: 1.1V to 6.0V
    • With BIAS: 0.7V to 6.0V
    • Enables LILO operations for sub-1V core voltage
  • Adjustable output voltage range: 0.5V to 5.2V
    • Set with a single external resistor (RREF)
    • VOUT = IREF × RREF
    • Unity-gain architecture maintains low noise across entire range
  • Output voltage noise: 2.45µVRMS (10Hz-100kHz, CNR/SS = 4.7µF)
    • Noise does not scale with VOUT
  • 1% (max) accuracy over line, load, and temperature
  • Low dropout: 75mV at 5A
    • Dropout independent of VOUT
  • Power-supply rejection ratio (5A):
    • 100dB at 1kHz
    • 78dB at 10kHz
    • 60dB at 100kHz
    • 36dB at 1MHz ← Industry-leading for high current LDO
  • Load transient response:
    • ±2mV with a 100mA to 5A load step
    • Fast response due to high loop bandwidth (≅1MHz)
  • Programmable soft-start: using CNR/SS
    • Dual function - inrush control + noise filtering
  • BIAS rail flexibility:
    • Internal charge pump (CP_EN) or 3V to 11V external rail
    • Internal charge pump can be disabled for zero switching noise
  • Power-good indicator (PG): Open-drain output:
    • Threshold: 90% of VOUT
    • Hysteresis: 2%
  • Package: 3mm × 3mm, 16-pin WQFN (RTE)
    • Thermal performance: RθJA: 21.9°C/W (EVM layout)

The TPS7A57 is an ultra-low-noise (2.45µVRMS), high-current (5A) linear regulator designed for noise-sensitive analog and digital loads requiring exceptional power supply quality. Featuring 75mV dropout, 36dB PSRR at 1MHz, and 1% accuracy, this LDO operates from 0.7V to 6V input with an internal charge pump or external bias rail, making the LDO designed for radar, RF, SERDES, and precision instrumentation applications.

The TPS7A57 is an ultra-low-noise (2.45µVRMS), high-current (5A) linear regulator designed for noise-sensitive analog and digital loads requiring exceptional power supply quality. Featuring 75mV dropout, 36dB PSRR at 1MHz, and 1% accuracy, this LDO operates from 0.7V to 6V input with an internal charge pump or external bias rail, making the LDO designed for radar, RF, SERDES, and precision instrumentation applications.
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Technical documentation

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* Data sheet TPS7A57 5A, Low-VIN (0.7V), Low-Noise (2.1μVRMS ), High-Accuracy (1%), Ultra-Low Dropout (LDO) Voltage Regulator datasheet (Rev. A) PDF | HTML 17 Mar 2026
White paper Demystifying LDO Turn-On (Start-Up) Time (Rev. B) PDF | HTML 10 Mar 2026
White paper Reduce System Noise Using Parallel LDOs PDF | HTML 03 Nov 2025
White paper Measuring Output Noise for Ultra-Low Noise LDOs PDF | HTML 28 Oct 2025
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
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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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