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.