V62/07613-01XE中文资料德州仪器数据手册PDF规格书

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-mW

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 mA, 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.