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TPS7A91

ACTIVE
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TLV759P ACTIVE 1-A, low-IQ, high-accuracy, adjustable ultra-low-dropout voltage regulator with enable 1A, adjustable output LDO with lower IQ for cost-sensitive applications.

TPS7A91

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Data sheet Order now

Product details

Rating Catalog Vin (max) (V) 6.5 Vin (min) (V) 1.4 Iout (max) (A) 1 Output options Adjustable Output Vout (max) (V) 5.2 Vout (min) (V) 0.8 Noise (µVrms) 4.7 PSRR at 100 KHz (dB) 48 Iq (typ) (mA) 2.1 Features Enable, Foldback Overcurrent protection, Output discharge, Power good, Soft start Thermal resistance θJA (°C/W) 57 Load capacitance (min) (µF) 22 Regulated outputs (#) 1 Accuracy (%) 1 Dropout voltage (Vdo) (typ) (mV) 130 Operating temperature range (°C) -40 to 125
Rating Catalog Vin (max) (V) 6.5 Vin (min) (V) 1.4 Iout (max) (A) 1 Output options Adjustable Output Vout (max) (V) 5.2 Vout (min) (V) 0.8 Noise (µVrms) 4.7 PSRR at 100 KHz (dB) 48 Iq (typ) (mA) 2.1 Features Enable, Foldback Overcurrent protection, Output discharge, Power good, Soft start Thermal resistance θJA (°C/W) 57 Load capacitance (min) (µF) 22 Regulated outputs (#) 1 Accuracy (%) 1 Dropout voltage (Vdo) (typ) (mV) 130 Operating temperature range (°C) -40 to 125
WSON (DSK) 10 6.25 mm² (2.5 mm × 2.5 mm)
  • 1.0% accuracy over line, load, and temperature
  • Low output noise: 4.7µVRMS (10Hz – 100kHz)
  • Low dropout: 200mV (maximum) at 1A
  • Wide input voltage range: 1.4V to 6.5V
  • Wide output voltage range: 0.8V to 5.2V
  • High power-supply rejection ratio (PSRR):
    • 70dB at DC
    • 40dB at 100kHz
    • 40dB at 1MHz
  • Fast transient response
  • Adjustable start-up in-rush control with selectable soft-start charging current
  • Open-drain power-good (PG) output
  • 2.5mm × 2.5mm, 10-pin SON package
  • 1.0% accuracy over line, load, and temperature
  • Low output noise: 4.7µVRMS (10Hz – 100kHz)
  • Low dropout: 200mV (maximum) at 1A
  • Wide input voltage range: 1.4V to 6.5V
  • Wide output voltage range: 0.8V to 5.2V
  • High power-supply rejection ratio (PSRR):
    • 70dB at DC
    • 40dB at 100kHz
    • 40dB at 1MHz
  • Fast transient response
  • Adjustable start-up in-rush control with selectable soft-start charging current
  • Open-drain power-good (PG) output
  • 2.5mm × 2.5mm, 10-pin SON package

The TPS7A91 is a low-noise (4.7µVRMS), low-dropout (LDO) voltage regulator capable of sourcing 1A with only 100mV of maximum dropout.

The TPS7A91 output is adjustable with external resistors from 0.8V to 5.7V. The TPS7A91 wide input voltage range supports operation as low as 1.4V and up to 6.5V.

With 1% output voltage accuracy (over line, load, and temperature) and soft-start capabilities to reduce in-rush current, the TPS7A91 is designed for powering sensitive analog low-voltage devices [such as voltage-controlled oscillators (VCOs), analog-to-digital converters (ADCs), digital-to-analog converters (DACs), high-end processors, and field-programmable gate arrays (FPGAs)].

The TPS7A91 is designed to power noise-sensitive components such as components found in high-speed communication, video, medical, or test and measurement applications. The very low 4.7µVRMS output noise and wideband PSRR (40dB at 1MHz) minimizes phase noise and clock jitter. These features maximize performance of clocking devices, ADCs, and DACs.

The TPS7A91 is a low-noise (4.7µVRMS), low-dropout (LDO) voltage regulator capable of sourcing 1A with only 100mV of maximum dropout.

The TPS7A91 output is adjustable with external resistors from 0.8V to 5.7V. The TPS7A91 wide input voltage range supports operation as low as 1.4V and up to 6.5V.

With 1% output voltage accuracy (over line, load, and temperature) and soft-start capabilities to reduce in-rush current, the TPS7A91 is designed for powering sensitive analog low-voltage devices [such as voltage-controlled oscillators (VCOs), analog-to-digital converters (ADCs), digital-to-analog converters (DACs), high-end processors, and field-programmable gate arrays (FPGAs)].

The TPS7A91 is designed to power noise-sensitive components such as components found in high-speed communication, video, medical, or test and measurement applications. The very low 4.7µVRMS output noise and wideband PSRR (40dB at 1MHz) minimizes phase noise and clock jitter. These features maximize performance of clocking devices, ADCs, and DACs.
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Technical documentation

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* Data sheet TPS7A91 1A, High-Accuracy, Low-Noise LDO Voltage Regulator datasheet (Rev. A) PDF | HTML Sep 24, 2026
White paper Demystifying LDO Turn-On (Start-Up) Time (Rev. B) PDF | HTML Mar 10, 2026
White paper Reduce System Noise Using Parallel LDOs PDF | HTML Nov 3, 2025
White paper Parallel LDO Architecture Design Using Ballast Resistors PDF | HTML Dec 14, 2022
White paper Comprehensive Analysis and Universal Equations for Parallel LDO's Using Ballast PDF | HTML Dec 13, 2022
Technical article LDO basics: noise – how a feed-forward capacitor improves system performance PDF | HTML Jul 25, 2017
Technical article LDO basics: noise – how a noise-reduction pin improves system performance PDF | HTML Jun 14, 2017

Design & development

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Evaluation board

TPS7A91EVM-831 — TPS7A91 1A Low-Noise Low-Vin Low-Dropout (LDO) Regulator for Analog Evaluation Module

The TPS7A91EVM-831 evaluation module is designed for a typical configuration to evaluate the operation and performance of the TPS7A91, 1A high-accuracy, low dropout voltage regulator. The EVM circuit board is configured to be a reference design for engineering applications requiring current to a (...)
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Simulation model

TPS7A91 PSpice Transient Model

SBVM662.ZIP (92 KB) - PSpice model
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Simulation model

TPS7A91 Unencrypted PSpice Transient Model

SBVM661.ZIP (2 KB) - PSpice model
Supported products & hardware
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 (...)

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