TPS74201

TPS74201

1

FEATURES

DESCRIPTION

APPLICATIONS

TPS74201

GND

EN

FB

IN

PG

BIAS

SS

OUT

V

IN

V

OUT

R

1

R

2

R

3

C

OUT

Optional

C

IN

1 F

m

C

SS

V

BIAS

C

BIAS

1 F

m

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

TPS74201

SBVS064F – DECEMBER 2005 – REVISED OCTOBER 2007

www.ti.com

1.5A Ultra-LDO with Programmable Soft-Start

2

• Soft-Start (SS) Pin Provides a Linear Startup

with Ramp Time Set by External Capacitor

The TPS74201 low-dropout (LDO) linear regulator

• 1% Accuracy Over Line, Load, and

provides an easy-to-use robust power management

Temperature

solution

for

a

wide

variety

of

applications.

• Supports Input Voltages as Low as 0.9V with

User-programmable soft-start minimizes stress on the

External Bias Supply

input power source by reducing capacitive inrush

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

• Adjustable Output (0.8V to 3.6V)

well suited for powering many different types of

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

processors

and

ASICs.

The

enable

input

and

• Stable with Any or No Output Capacitor

power-good

output

allow

easy

sequencing

with

• Excellent Transient Response

external regulators. This complete flexibility permits

the user to configure a solution that will meet the

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

sequencing requirements of FPGAs, DSPs, and other

DDPAK-7 Packages

applications with special start-up requirements.

• Open-Drain Power-Good (5 × 5 QFN)

A precision reference and error amplifier deliver 1%

• Active High Enable

accuracy over load, line, temperature, and process.

Each LDO is stable with low-cost ceramic output

capacitors and the device is fully specified from

• FPGA Applications

–40

°C to +125°C. The TPS74201 is offered in a small

(5mm

× 5mm) QFN package, yielding a highly

• DSP Core and I/O Voltages

compact total solution size. For applications that

• Post-Regulation Applications

require additional power dissipation, the DDPAK

• Applications with Special Start-Up Time or

(KTW) package is also available.

Sequencing Requirements

• Hot-Swap and Inrush Controls

Figure 1. Typical Application Circuit for the

TPS74201 (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 © 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.