1 Features

• Input voltage range: 0.8V to 5.5V

• Soft-start (SS) pin provides a linear start-up with

ramp time set by external capacitor

• 1% accuracy over line, load, and temperature

• Supports input voltages as low as 0.8V with

external bias supply

• Adjustable output (0.8V to 3.6V)

• Ultra-Low Dropout:

– 60mV (legacy chip) at 1.5A (typical)

– 55mV (new chip) at 1.5A (typical)

• Stable with any output capacitor ≥ 2.2μF (new

chip)

• Stable with any or no output capacitor (legacy

chip)

• Excellent transient response

• Open-drain power-good

• Active high enable

2 Applications

• Network attached storage - enterprise

• Rack servers

• Network interface cards (NIC)

• Merchant network and server PSU

3 Description

The TPS742 series of low-dropout (LDO) linear

regulators provide an easy-to-use, robust powermanagement

solution for a wide variety of

applications. 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 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 1%

accuracy over load, line, temperature, and process.

The device is is stable with any type of capacitor

greater than or equal to 2.2μF (new chip), and is fully

specified from –40°C to 125°C.