PTH04070W Datasheet, PDF (1/15 Pages) Texas Instruments – 3-A, 3.3/5-V INPUT ADJUSTABLE SWITCHING REGULATOR

PTH04070W
www.ti.com
SLTS227 – SEPTEMBER 2004
3-A, 3.3/5-V INPUT ADJUSTABLE SWITCHING REGULATOR
FEATURES
• Up to 3-A Output Current at 85°C
• 3.3-V / 5-V Input Voltage
• Wide-Output Voltage Adjust
(0.9 V to 3.6 V)
• 160 W/in³ Power Density
• 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
• Surface Mount Package
• Safety Agency Approvals:
UL/CUL 60950, EN60950 VDE (Pending)
APPLICATIONS
• Telecommunications, Instumentation,
and General-Purpose Circuits
DESCRIPTION
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.
STANDARD APPLICATION
Inhibit
5
4
VI
PTH04070W
(Top View)
RSET
0.05 W^#, 1%
(Required)
1
3
GND
C1*
2
47 mF
Ceramic
(Required)
C2*
47 mF
Ceramic
(Required)
#See The Specification Table for Value
*See The Capacitor Application Information
VO
C3*
47 mF
Electroytic
(Recommended)
GND
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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2004, Texas Instruments Incorporated