Single-Output LDO, 3A, Adj (0.8V to 3.3V), Fast Transient Response, Programmable Soft Start

Single-Output LDO, 3A, Adj (0.8V to 3.3V), Fast Transient Response, Programmable Soft Start - TPS74401

Recommended alternative parts

  • TPS7A84A  -  The TPS7A84A is a 3A LDO with lower noise 4.4 uVrms, improved accuracy 0.75% and wider VOUT range (0.8 V to 5.15V)

Special note

Use two TPS74401’s in parallel and source up to 6A using this verified TI Design TIDA-00270.


The TPS74401 low-dropout (LDO) linear regulators provide an easy-to-use robust power-management solution for a wide variety of applications. The user-programmable soft-start minimizes stress on the input power source by reducing capacitive inrush current on start-up. The soft-start is monotonic and well-suited 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 lets the user configure a solution that meets the sequencing requirements of field-programmable gate arrays (FPGAs), digital signal processors (DSPs), and other applications with specific start-up requirements.

A precision reference and error amplifier deliver 1% accuracy over load, line, temperature, and process. The TPS74401 family of LDOs is stable without an output capacitor or with ceramic output capacitors. The device family is fully specified from TJ = –40°C to 125°C. The TPS74401 is offered in two 20-pin small VQFN packages (a 5-mm × 5-mm RGW and a
3.5-mm × 3.5-mm RGR package), yielding a highly compact total solution size. For applications that require additional power dissipation, the DDPAK (KTW) package is also available.


  • Input Voltage Range: 1.1 V to 5.5 V
  • Soft-Start (SS) Pin Provides a Linear Startup With Ramp Time Set by External Capacitor
  • 1% Accuracy Over Line, Load, and Temperature
  • Supports Input Voltages as Low as 0.9 V With External Bias Supply
  • Adjustable Output: 0.8 V to 3.6 V
  • Ultra-Low Dropout: 115 mV at 3.0 A (typical)
  • Stable With Any or No Output Capacitor
  • Excellent Transient Response
  • Open-Drain Power-Good (VQFN Only)
  • Packages: 5-mm × 5-mm × 1-mm VQFN (RGW), 3.5-mm × 3.5-mm VQFN (RGR), and DDPAK

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Parametrics Compare all products in Single Channel LDO

Iout (Max) (A)
Output Options
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iq (Typ) (mA)
Vdo (Typ) (mV)
Accuracy (%)
Noise (uVrms)
PSRR @ 100KHz (dB)
Output Capacitor Type
Operating Temperature Range (C)
TPS74401 TPS74201 TPS74301 TPS74701 TPS74801 TPS74901
3    1.5    1.5    0.5    1.5    3   
Adjustable Output    Adjustable Output    Adjustable Output
Tracking Output   
Adjustable Output    Adjustable Output    Adjustable Output   
0.8    0.8    0.8    0.8    0.8    0.8   
5.5    5.5    5.5    5.5    5.5    5.5   
0.8    0.8    0.8    0.8    0.8    0.8   
3.6    3.5    3.6    3.6    3.6    3.6   
3    3    3    1    1    3   
115    55    55    50    60    120   
1    1    1    2    2    2   
13    13    20    20    20    20   
50    52    45    27    28    28   
Cap Free
Cap Free
Cap Free
Ceramic    Ceramic    Ceramic   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
-40 to 125    -40 to 125
-40 to 85   
-40 to 85    -40 to 125    -40 to 125    -40 to 125   
10VSON    10VSON

Other qualified versions of TPS74401

Version Part Number Definition
Enhanced Product TPS74401-EP Supports Defense, Aerospace and Medical Applications
New! Interactive Design
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WEBENCH® Designer TPS74401

  Min   Max Range
Vin  V 0.8 to 5.5V
Vout  V 0.8 to 3.6V
Iout  A ≤ 3A
Ambient Temp  °C -40 to 125°C

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