TPS74901_16 Datasheet, PDF (1/36 Pages) Texas Instruments – 3-A Low Dropout Linear Regulator With Programmable Soft-Start

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TPS74901
SBVS082I – JUNE 2007 – REVISED MAY 2016
TPS74901 3-A Low Dropout Linear Regulator With Programmable Soft-Start
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
Typical Application Circuit (Adjustable)
V_IN
IN
PG
C_IN
BIAS
R₃
EN ^{TPS74901 OUT}
V_BIAS
C_BIAS
SS
GND
R₁
FB
C_SS
R₂
V_OUT
C_OUT
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.
PART
NUMBER
TPS74901
Device Information⁽¹⁾
PACKAGE
BODY SIZE (NOM)
VQFN (20)
DDPAK/TO-263 (7)
VSON (10)
5.00 mm × 5.00 mm
8.89 mm × 10.10 mm
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Turnon Response
1V/div
C_SS = 0mF
C_SS = 0.001mF
C_SS = 0.0047mF
V_OUT
Copyright © 2016, Texas Instruments Incorporated
1.2V
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.