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FEATURES

APPLICATIONS

DESCRIPTION

GND

GND

R

#

SET

0.05 W, 1%

(Required)

C *

I

100 F

m

Electrolytic

(Required)

C *

O

100 F

m

Electrolytic

(Optional)

Inhibit

3

PTH08080W

STANDARD APPLICATION

(Top View )

1

2

5

4

* See The Capacitor Application Information

# See the Specification Table for the R

value.

SET

$ Diode is Required When V

5.25 V and V

16 V.

O

I

>

>

+

PTH08080W

SLTS235A – FEBRUARY 2005 – REVISED MARCH 2005

2.25-A, WIDE-INPUT ADJUSTABLE SWITCHING REGULATOR

•

Ambient Temperature Range: –40

°C to 85°C

•

Up to 2.25-A Output Current at 85

°C

•

Surface-Mount Package

•

4.5-V to 18-V Input Voltage Range

•

Safety Agency Approvals:

UL/CUL 60950, EN60950 VDE (Pending)

•

Wide-Output Voltage Adjust

(0.9 V to 5.5 V)

•

Efficiencies Up To 93%

•

Telecommunications, Instumentation,

•

On/Off Inhibit

and General-Purpose Circuits

•

Undervoltage Lockout (UVLO)

•

Output Overcurrent Protection

(Nonlatching, Auto-Reset)

•

Overtemperature Protection

The PTH08080W is a highly integrated, low-cost switching regulator module that delivers up to 2.25 A of output

current. The PTH08080W sources output current at a much higher efficiency than a TO-220 linear regulator IC,

thereby eliminating the need for a heat sink. Its small size (0.5

× 0.6 in) and flexible operation creates value for a

variety of applications.

The input voltage range of the PTH08080W is from 4.5 V to 18 V, allowing operation from either a 5-V or 12-V

input bus. Using state-of-the-art switched-mode power-conversion technology, the PTH08080W 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. 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.

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.

PRODUCTION DATA information is current as of publication date.

Copyright © 2005, 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.