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FEATURES

DESCRIPTION

APPLICATIONS

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

SBVS082A – JUNE 2007 – REVISED JULY 2007

3.0A Low Dropout Linear Regulator with Programmable Soft-Start

• Ultra-Low V

The TPS749xx low-dropout (LDO) linear regulator

• V

provides an easy-to-use robust power management

• Low Dropout: 120mV (typ) at 3.0A, V

solution

for

a

wide

variety

of

applications.

• Power-Good (PG) Output Allows Supply

User-programmable soft-start minimizes stress on

Monitoring or Provides a Sequencing Signal

the input power source by reducing capacitive inrush

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

for Other Supplies

well-suited for powering many different types of

• 2% Accuracy Over Line/Load/Temperature

processors and ASICs. The enable input and

• Programmable Soft-Start Provides Linear

power-good output allow easy sequencing with

Voltage Startup

external regulators. This complete flexibility permits

the user to configure a solution that meets the

• V

sequencing requirements of FPGAs, DSPs, and

Transient Response

other applications with special start-up requirements.

• Stable with Any Output Capacitor ≥ 2.2μF

A precision reference and error amplifier deliver 2%

• Available in 5mm × 5mm × 1mm QFN and

accuracy over load, line, temperature, and process.

DDPAK-7 Packages

The device is stable with any type of capacitor

≥

• Open-Drain Power-Good

2.2

μF, and the device is fully specified from –40

°C to

• Active High Enable

+125

°C. The TPS749xx is offered in a small (5mm ×

5mm) QFN package, yielding a highly compact total

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

• FPGA Applications

• DSP Core and I/O Voltages

• Post-Regulation Applications

• Applications with Special Start-Up Time or

Sequencing Requirements

• Hot-Swap and Inrush Controls

Figure 1. Typical Application Circuit (Adjustable)

Figure 2. Turn-On Response

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.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2007, 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.