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Linear & low-dropout (LDO) regulators

TPS74901

ACTIVE

3-A, low-VIN (0.8-V) adjustable ultra-low-dropout voltage regulator with power good and enable

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Data sheet

TPS74901

ACTIVE
Data sheet Order now

Product details

Output options Adjustable Output Iout (max) (A) 3 Vin (max) (V) 5.5 Vin (min) (V) 0.8 Vout (max) (V) 3.6 Vout (min) (V) 0.8 Rating Catalog Noise (µVrms) 20 PSRR at 100 KHz (dB) 28 Iq (typ) (mA) 3 Thermal resistance θJA (°C/W) 34, 36 Load capacitance (min) (µF) 2.2 Regulated outputs (#) 1 Features Enable, Power good, Soft start Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 60, 120 Operating temperature range (°C) -40 to 125
Output options Adjustable Output Iout (max) (A) 3 Vin (max) (V) 5.5 Vin (min) (V) 0.8 Vout (max) (V) 3.6 Vout (min) (V) 0.8 Rating Catalog Noise (µVrms) 20 PSRR at 100 KHz (dB) 28 Iq (typ) (mA) 3 Thermal resistance θJA (°C/W) 34, 36 Load capacitance (min) (µF) 2.2 Regulated outputs (#) 1 Features Enable, Power good, Soft start Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 60, 120 Operating temperature range (°C) -40 to 125
TO-263 (KTW) 7 153.924 mm² 10.1 x 15.24 VQFN (RGW) 20 25 mm² 5 x 5 VSON (DRC) 10 9 mm² 3 x 3
  • VOUT range: 0.8V to 3.6V
  • Ultra-low VIN range: 0.8V to 5.5V
  • VBIAS range: 2.7V to 5.5V
  • Low dropout: 120mV (typical) at 3A
  • Power-good (PG) output allows supply monitoring or provides a sequencing signal for other supplies
  • Accuracy over line, load, and temperature: 1% (new chip)
  • Accuracy over line, load, and temperature: 2% (legacy chip)
  • Adjustable start-up in-rush control
  • VBIAS permits low VIN operation with good transient response
  • Stable with any output capacitor ≥ 2.2µF
  • Packages:
    • Small, 3mm × 3mm × 1mm VSON
    • 5mm × 5mm × 1mm VQFN and DDPAK-7
  • Active high enable
  • VOUT range: 0.8V to 3.6V
  • Ultra-low VIN range: 0.8V to 5.5V
  • VBIAS range: 2.7V to 5.5V
  • Low dropout: 120mV (typical) at 3A
  • Power-good (PG) output allows supply monitoring or provides a sequencing signal for other supplies
  • Accuracy over line, load, and temperature: 1% (new chip)
  • Accuracy over line, load, and temperature: 2% (legacy chip)
  • Adjustable start-up in-rush control
  • VBIAS permits low VIN operation with good transient response
  • Stable with any output capacitor ≥ 2.2µF
  • Packages:
    • Small, 3mm × 3mm × 1mm VSON
    • 5mm × 5mm × 1mm VQFN and DDPAK-7
  • Active high enable

The TPS74901 low-dropout (LDO) linear regulator provides an easy-to-use, robust power management solution for a wide variety of applications. User-programmable soft-start minimizes stress on the input power source by reducing capacitive inrush current during start-up. The soft-start is monotonic and designed for powering many different types of processors and application-specific integrated circuits (ASICs). The enable input and power-good output allow easy sequencing with external regulators. This complete flexibility allows a solution to be configured that meets the sequencing requirements of field-programmable gate arrays (FPGAs), digital signal processors (DSPs), and other applications with special start-up requirements.

A precision reference and error amplifier deliver 2% accuracy over load, line, temperature, and process. The device is stable with any type of capacitor ≥ 2.2µF, and the device is fully specified from –40°C to +125°C. The TPS74901 is offered in a small (3mm × 3mm) VSON package and a small (5mm × 5mm) VQFN package, yielding a highly compact total solution size. The device is also available in a DDPAK-7 package.

The TPS74901 low-dropout (LDO) linear regulator provides an easy-to-use, robust power management solution for a wide variety of applications. User-programmable soft-start minimizes stress on the input power source by reducing capacitive inrush current during start-up. The soft-start is monotonic and designed for powering many different types of processors and application-specific integrated circuits (ASICs). The enable input and power-good output allow easy sequencing with external regulators. This complete flexibility allows a solution to be configured that meets the sequencing requirements of field-programmable gate arrays (FPGAs), digital signal processors (DSPs), and other applications with special start-up requirements.

A precision reference and error amplifier deliver 2% accuracy over load, line, temperature, and process. The device is stable with any type of capacitor ≥ 2.2µF, and the device is fully specified from –40°C to +125°C. The TPS74901 is offered in a small (3mm × 3mm) VSON package and a small (5mm × 5mm) VQFN package, yielding a highly compact total solution size. The device is also available in a DDPAK-7 package.
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Technical documentation

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Type Title Date
* Data sheet TPS74901 3A, Low Dropout Linear Regulator With Programmable Soft-Start datasheet (Rev. K) PDF | HTML 21 Jun 2024
Application note LDO Noise Demystified (Rev. B) PDF | HTML 18 Aug 2020
Application note A Topical Index of TI LDO Application Notes (Rev. F) 27 Jun 2019
Selection guide Low Dropout Regulators Quick Reference Guide (Rev. P) 21 Mar 2018
Application note LDO PSRR Measurement Simplified (Rev. A) PDF | HTML 09 Aug 2017
Analog Design Journal Q2 2009 Issue Analog Applications Journal 01 May 2009
Analog Design Journal Taming linear-regulator inrush currents 01 May 2009
EVM User's guide TPS74901EVM-210 (Rev. B) 24 Jul 2008
EVM User's guide TPS74901EVM-210 14 Apr 2007

Design & development

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

Evaluation board

TPS74901EVM-210 — TPS74901 evaluation module for 3-A, low-VIN (0.8-V) adjustable ultra-low-dropout voltage regulator

The TPS74901EVM-210 facilitates evaluation of the TPS74901 low-dropout linear regulator IC.

These regulators require a low-power bias voltage, VBIAS, and a power input voltage, VIN. The regulator is capable of providing output voltages down to 0.8 V, output currents up to 3 A and has an (...)

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

TPS74901 PSpice Transient Model (Rev. B)

SLIM031B.ZIP (60 KB) - PSpice Model
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Simulation model

TPS74901 TINA-TI Transient Reference Design

SLIM257.TSC (94 KB) - TINA-TI Spice Model
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Simulation model

TPS74901 TINA-TI Transient Spice Model

SLIM256.ZIP (35 KB) - TINA-TI Spice Model
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Simulation model

TPS74901 Unencrypted PSpice Transient Model

SBVM634.ZIP (3 KB) - PSpice Model
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TIDA-00826 — 50-Ohm 2-GHz Oscilloscope Front-end Reference Design

This reference design is part of an analog front-end for 50Ω-input oscilloscope application. System designers can readily use this evaluation platform to process input signals from DC to 2 GHz in both frequency-domain and time-domain applications.
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Design guide: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
TO-263 (KTW) 7 Ultra Librarian
VQFN (RGW) 20 Ultra Librarian
VSON (DRC) 10 Ultra Librarian
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