TPS74901

GND

EN

FB

IN

PG

BIAS

SS

OUT

V

IN

R

1

R

2

R

3

C

OUT

C

IN

C

SS

V

BIAS

C

BIAS

V

OUT

1V/div

1V/div

Time(1ms/div)

C

=0 F

SS

m

C

=0.001 F

SS

m

C

=0.0047 F

SS

m

V

OUT

V

EN

0V

1.2V

TPS749xx

www.ti.com

SBVS082G – JUNE 2007 – REVISED NOVEMBER 2010

3.0A Low Dropout Linear Regulator with Programmable Soft-Start

Check for Samples: TPS749xx

1

FEATURES

DESCRIPTION

2

•

The TPS749xx 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

•

Power-Good (PG) Output Allows Supply

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

Monitoring or Provides a Sequencing Signal

well-suited for powering many different types of

for Other Supplies

processors

and

ASICs.

The

enable

input

and

•

2% Accuracy Over Line/Load/Temperature

power-good

output

allow

easy

sequencing

with

•

Programmable Soft-Start Provides Linear

external regulators. This complete flexibility permits

the user to configure a solution that meets the

Voltage Startup

sequencing requirements of FPGAs, DSPs, and other

•

applications with special start-up requirements.

Transient Response

A precision reference and error amplifier deliver 2%

•

Stable with Any Output Capacitor

≥ 2.2mF

accuracy over load, line, temperature, and process.

•

Available in 5mm × 5mm × 1mm QFN and

The device is stable with any type of capacitor

DDPAK-7 Packages

≥ 2.2mF, and the device is fully specified from –40°C

•

Open-Drain Power-Good

to +125°C. The TPS749xx is offered in a small (5mm

× 5mm) QFN package, yielding a highly compact total

•

Active High Enable

solution size. It is also available in a DDPAK-7.

APPLICATIONS

blank

•

FPGA Applications

blank

•

DSP Core and I/O Voltages

blank

•

Post-Regulation Applications

blank

•

Applications with Special Start-Up Time or

Sequencing Requirements

blank

•

Hot-Swap and Inrush Controls

blank

Figure 1. Typical Application Circuit (Adjustable)

Figure 2. Turn-On Response

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2007–2010, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.