TPS74301

TPS74301

www.ti.com

FEATURES

DESCRIPTION

APPLICATIONS

R

1

R

5

R

3

R

4

R

2

V

OUT

C

OUT

Optional

PG

OUT

FB

IN

BIAS

TRACK

GND

V

IN

V

BIAS

C

IN

C

BIAS

V

TRACK

V

PG

TPS74301

EN

Time(20ms/div)

V

PG

V

TRACK

I

=500mA

OUT

V

OUT

TPS74301

SBVS065E – DECEMBER 2005 – REVISED MAY 2007

1.5A Ultra-LDO with Programmable Sequencing

• Track Pin Allows for Flexible Power-Up

The TPS74301 low-dropout (LDO) linear regulator

Sequencing

provides an easy-to-use robust power management

• 1% Accuracy Over Line, Load, and

solution for a wide variety of applications. The

Temperature

TRACK pin allows the output to track an external

• Supports Input Voltages as Low as 0.9V with

supply. This feature is useful in minimizing the stress

External Bias Supply

on ESD structures that are present between the

CORE and I/O power pins of many processors. The

• Adjustable Output (0.8V to 3.6V)

enable input and power-good output allow easy

• Ultra-Low Dropout: 55mV at 1.5A (typ)

sequencing with external regulators. This complete

• Stable with Any or No Output Capacitor

flexibility allows the user to configure a solution that

meets the sequencing requirements of FPGAs,

• Excellent Transient Response

DSPs, and other applications with special start-up

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

requirements.

DDPAK-7 Packages

A precision reference and error amplifier deliver 1%

• Open-Drain Power-Good (5 × 5 QFN)

accuracy over load, line, temperature, and process.

• Active High Enable

Each LDO is stable with low-cost ceramic output

capacitors and the device is fully specified from

–40

°C to +125°C. The TPS74301 is offered in a

• FPGA Applications

small (5mm

× 5mm) QFN package, yielding a highly

compact total solution size. For applications that

• DSP Core and I/O Voltages

require additional power dissipation, the DDPAK

• Post-Regulation Applications

(KTW) package is also available.

• Applications with Special Start-Up Time or

Sequencing Requirements

Figure 1. Typical Application Circuit

Figure 2. Tracking 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 © 2005–2007, 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.