1 Features
• 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

2 Applications
• Network attached storage - enterprise
• Rack servers
• Network interface cards (NIC)
• Merchant network and server PSU

3 Description
The TPS74901 low-dropout (LDO) linear regulator
provides an easy-to-use, robust power management
solution for a wide variety of applications. Userprogrammable
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.