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1V/div
1V/div
Time(1ms/div)
C =0 F
SS
m
C =0.001 F
SS
m
C =0.0047 F
SS
m
V
OUT
V
EN
0V
1.2V
TPS74901
GND
EN
FB
IN PG
BIAS
SS
OUT
V
IN
R
1
R
2
R
3
C
OUT
C
IN
C
SS
V
BIAS
C
BIAS
V
OUT
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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.
TPS74901
SBVS082I –JUNE 2007–REVISED MAY 2016
TPS74901 3-A Low Dropout Linear Regulator With Programmable Soft-Start
1
1 Features
1
• V
OUT
Range: 0.8 V to 3.6 V
• Ultralow V
IN
Range: 0.8 V to 5.5 V
• V
BIAS
Range: 2.7 V to 5.5 V
• Low Dropout: 120 mV (Typical) at 3 A
• Power-Good (PG) Output Allows Supply
Monitoring or Provides a Sequencing Signal for
Other Supplies
• 2% Accuracy Over Line, Load, and Temperature
• Adjustable Start-Up In-Rush Control
• V
BIAS
Permits Low V
IN
Operation With Good
Transient Response
• Stable with Any Output Capacitor ≥ 2.2 µF
• Packages:
– Small, 3-mm × 3-mm × 1-mm VSON
– 5-mm × 5-mm × 1-mm VQFN and DDPAK-7
• Active High Enable
2 Applications
• FPGA Applications
• DSP Core and I/O Voltages
• Servers
• Post-Regulation Applications
• Applications with Special Start-Up Time or
Sequencing Requirements
SPACE
3 Description
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 well-
suited for powering many different types of
processors and ASICs. The enable input and power-
good output allow easy sequencing with external
regulators. This complete flexibility permits the user to
configure a solution that meets the sequencing
requirements of FPGAs, 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
≥ 2.2 µF, and the device is fully specified from –40°C
to 125°C. The TPS74901 is offered in a small (3 mm
× 3 mm) VSON package and a small (5-mm × 5-mm)
VQFN package, yielding a highly compact total
solution size. The device is also available in a
DDPAK-7 package.
Device Information
(1)
PART
NUMBER
PACKAGE BODY SIZE (NOM)
TPS74901
VQFN (20) 5.00 mm × 5.00 mm
DDPAK/TO-263 (7) 8.89 mm × 10.10 mm
VSON (10) 3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Circuit (Adjustable)
Turnon Response
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