TPS5420-EP Datasheet, PDF (1/22 Pages) Texas Instruments – 2-A WIDE-INPUT-RANGE STEP-DOWN SWIFT™ CONVERTER

TPS5420-EP
www.ti.com
SLVS717 – DECEMBER 2006
2-A WIDE-INPUT-RANGE STEP-DOWN SWIFT™ CONVERTER
FEATURES
• Controlled Baseline
– One Assembly/Test Site, One Fabrication
Site
• Enhanced Diminishing Manufacturing Sources
(DMS) Support
• Enhanced Product-Change Notification
• Qualification Pedigree ⁽¹⁾
• Wide Input Voltage Range: 5.5 V to 35 V
• Up to 2-A Continuous (3-A Peak) Output
Current
• High Efficiency up to 95% Enabled by 110-mΩ
Integrated MOSFET Switch
• Wide Output Voltage Range: Adjustable Down
to 1.22 V with 1.5% Initial Accuracy
• Internal Compensation Minimizes External
Parts Count
(1) Component qualification in accordance with JEDEC and
industry standards to ensure reliable operation over an
extended temperature range. This includes, but is not limited
to, Highly Accelerated Stress Test (HAST) or biased 85/85,
temperature cycle, autoclave or unbiased HAST,
electromigration, bond intermetallic life, and mold compound
life. Such qualification testing should not be viewed as
justifying use of this component beyond specified
performance and environmental limits.
• Fixed 500-kHz Switching Frequency for Small
Filter Size
• Improved Line Regulation and Transient
Response by Input Voltage Feed Forward
• System Protected by Overcurrent Limiting and
Thermal Shutdown
• -55°C to 125°C Operating Junction
Temperature Range
• Available in Small 8-Pin SOIC Package
• For SWIFT™ Documentation, Application
Reports, and Design Software, See the TI
Website at www.ti.com/swift
APPLICATIONS
• Consumer: Set-Top Boxes, DVDs, LCD
Displays
• Industrial and Car Audio Power Supplies
• Battery Chargers, High-Power LED Supplies
• 12-V/24-V Distributed Power Systems
DESCRIPTION/ORDERING INFORMATION
As a member of the SWIFT™ family of dc/dc regulators, the TPS5420 is a high-output-current PWM converter
that integrates a low-resistance high-side N-channel MOSFET. Included on the substrate with the listed features
is a high-performance voltage error amplifier that provides tight voltage regulation accuracy under transient
conditions, an undervoltage-lockout circuit to prevent start-up until the input voltage reaches 5.5 V, an internally
set slow-start circuit to limit inrush currents, and a voltage feed-forward circuit to improve the transient response.
Using the ENA pin, shutdown supply current is reduced to 18 µA, typically. Other features include an active high
enable, overcurrent protection, and thermal shutdown. To reduce design complexity and external component
count, the TPS5420 feedback loop is internally compensated.
The TPS5420 device is available in an easy to use 8-pin SOIC package. TI provides evaluation modules and the
SWIFT Designer Software tool to aid in quickly achieving high-performance power-supply designs to meet
aggressive equipment development cycles.
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.
SWIFT is a trademark of Texas Instruments.
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 © 2006, Texas Instruments Incorporated