TPS74401_15 Datasheet, PDF (1/39 Pages) Texas Instruments – TPS74401 3.0-A, Ultra-LDO with Programmable Soft-Start

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TPS74401
SBVS066Q – DECEMBER 2005 – REVISED APRIL 2015
TPS74401 3.0-A, Ultra-LDO with Programmable Soft-Start
1 Features
•1 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)
• Available in 5-mm × 5-mm × 1-mm VQFN and
DDPAK-7 Packages
2 Applications
• FPGA Applications
• DSP Core and I/O Voltages
• Post-Regulation Applications
• Applications With Special Start-Up Time or
Sequencing Requirements
• Hot-Swap and Inrush Controls
Typical Application Circuits
ADJUSTABLE VOLTAGE VERSION
V_IN
V_BIAS
C_IN
1mF
C_BIAS
1mF
IN
PG
EN
BIAS ^{TPS74401 OUT}
SS
GND
FB
C_SS
R_pullup
R₁
C_OUT
R₂
Optional
V_PG
V_OUT
V_IN
V_BIAS
FIXED VOLTAGE VERSION
C_IN
1mF
C_BIAS
1mF
IN
PG
EN
BIAS ^{TPS744xx OUT}
SS
C_SS
GND ^SNS
R_pullup
C_OUT
V_PG
V_OUT
Optional
3 Description
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 T_J = –40°C to
125°C. The TPS74401 is offered in a small (5-mm ×
5-mm) VQFN package, yielding a highly compact
total solution size. For applications that require
additional power dissipation, the DDPAK (KTW)
package is also available.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS74401
TO-263 (7)
VQFN (20)
10.10 mm × 8.89 mm
5.00 mm × 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
500mV/div
Turn-On Response
C_SS = 0mF
C_SS = 0.001mF
C_SS = 0.0047mF
V_OUT
1.1V
V_EN
1V/div _0V
Time (1ms/div)
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.