1

FEATURES

APPLICATIONS

DESCRIPTION

STANDARD APPLICATION

VI

GND

GND

VO

RSET

(Required)

3

1

2

5

4

PTH04070W

(Top View)

C3*

47 mF

Electroytic

(Recommended)

C2*

47 mF

Ceramic

(Required)

C1*

47 mF

Ceramic

(Required)

Inhibit

*See The Capacitor Application Information

#See The Specification Table for Value

PTH04070W

SLTS227B – SEPTEMBER 2004 – REVISED OCTOBER 2007

www.ti.com

3-A, 3.3/5-V INPUT ADJUSTABLE SWITCHING REGULATOR

• Surface Mount Package

• Up to 3-A Output Current at 85°C

• Safety Agency Approvals:

UL/IEC/CSA-C22.2 60950-1

• 3.3-V / 5-V Input Voltage

• Wide-Output Voltage Adjust

(0.9 V to 3.6 V)

• Telecommunications, Instumentation,

and General-Purpose Circuits

• Efficiencies Up To 94%

• On/Off Inhibit

• Undervoltage Lockout (UVLO)

• Output Overcurrent Protection

(Nonlatching, Auto-Reset)

• Overtemperature Protection

• Ambient Temp. Range: –40°C to 85°C

The PTH04070W is a highly integrated, low-cost switching regulator module that delivers up to 3 A of output

current. Occupying less PCB area than a standard TO-220 linear regulator IC, the PTH04070W provides output

current at a much higher efficiency and with much less power dissipation, thereby eliminating the need for a heat

sink. Their small size (0.5

× 0.4 in), high efficiency, and low cost makes these modules attractive for a variety of

applications.

The input voltage range of the PTH04070W is from 3 V to 5.5 V, allowing operation from either a 3.3-V or 5-V

input bus. Using state-of-the-art switched-mode power-conversion technology, the PTH04070W can step down to

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

voltage can be adjusted to any voltage over the range, 0.9 V to 3.6 V, using a single external resistor. Operating

features

include

an

undervoltage

lockout

(UVLO),

on/off

inhibit,

output

overcurrent

protection,

and

overtemperature protection. Target applications include telecommunications, test and measurement applications,

and high-end consumer products. The modules are available in both through-hole and surface-mount package

options, including tape and reel.

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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 © 2004–2007, 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.