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: 60 mV typical at 1.5A, VBIAS = 5V

? Power-good (PG) output allows supply monitoring

or provides a sequencing signal for other supplies

? 1% accuracy over line, load, and temperature (new

chip)

? 2% accuracy over line, load, and temperature

(legacy chip)

? Programmable soft-start provides linear voltage

start-up

? VBIAS permits low VIN operation with good transient

response

? Stable with any output capacitor ≥ 2.2μF

? Available in small, 3mm × 3mm × 1mm VSON-10

and 5mm × 5mm VQFN-20 packages

2 Applications

? Network attached storage - enterprise

? Rack servers

? Network interface cards (NIC)

? Merchant network and server PSU

3 Description

The TPS748 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

on start-up. The soft-start is monotonic and designed

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 allows a solution to be configured

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 (new chip) over load, line, temperature,

and process. The device is stable with any type of

capacitor greater than or equal to 2.2μF, and is fully

specified for TJ = –40°C to +125°C. The TPS748 is

offered in a small, 3mm × 3mm, VSON-10 package,

yielding a highly compact, total solution size. The

device is also available in a 5mm × 5mm VQFN-20

package for compatibility with the TPS742.