2.25-A, WIDE INPUT, ADJUSTABLE SWITCHING REGULATOR

1

FEATURES

APPLICATIONS

DESCRIPTION

1

5

2

3

4

6

+

+

PTH08000W

(TopView)

Track

GND

R

#

1%,0.05W

(Required)

SET

Inhibit

C

100 F

(Required)

I*

µ

C

100 F

(Optional)

O*

µ

VI

VO

GND

STANDARD APPLICATION

*Seethe ApplicationInformationsectionforcapacitorrecommendations.

#Seethe ApplicationInformationsectionforR

values.

SET

PTH08000W

SLTS248B – JUNE 2005 – REVISED FEBRUARY 2008

www.ti.com

WITH AUTO-TRACK™ SEQUENCING

• Safety Agency Approvals:

UL/CUL 60950, EN60950

2

• Up to 2.25-A Output Current at 85°C

• 4.5-V to 14-V Input Voltage Range

• Wide-Output Voltage Adjust

• Telecommunications, Instrumentation,

(0.9 V to 5.5 V)

and General-Purpose Circuits

• Efficiencies Up to 94%

• On/Off Inhibit

• Undervoltage Lockout (UVLO)

• Output Overcurrent Protection

(Nonlatching, Auto-Reset)

• Overtemperature Protection

• Ambient Temperature Range: –40°C to 85°C

• Surface-Mount Package

The PTH08000W is a highly integrated, low-cost switching regulator module that delivers up to 2.25 A of output

current. The PTH08000W sources output current at a much higher efficiency than a TO-220 linear regulator IC,

eliminating the need for a heatsink. The small size (0.75 inch

× 0.5 inch) and flexible operation creates value for

a variety of applications.

The input voltage range of the PTH08000W is 4.5 V to 14 V, allowing operation from either a 5-V or 12-V input

bus. Using state-of-the-art switched-mode power-conversion technology, the PTH08000W can step down to

voltages as low as 0.9 V from a 5-V input bus, with less than 1 W of power dissipation. The output voltage can

be adjusted to any voltage over the range, 0.9 V to 5.5 V, using a single external resistor. This series includes

Auto-Track™ sequencing. This feature simplifies the task of supply voltage sequencing in a power system by

enabling modules to track each other, or any external voltage, during power up and power down. Operating

features include an undervoltage lockout (UVLO), on/off inhibit, overcurrent protection, and overtemperature

protection. Target applications include telecommunications, test and measurement applications, and high-end

consumer products. This product is available in both through-hole and surface-mount package options, including

tape and reel. The PTH08000W is compatible with TI's roadmap for RoHS and lead-free compliance.

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

Auto-Track, POLA, TMS320 are trademarks of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2005–2008, 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.