TPS5450QDDARQ1,TPS5450QDDARQ1,TPS5450QDDARQ1, 规格书,Datasheet 资料

Simplified Schematic Efficiency vs Output Current

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TPS5450-Q1

SLVS834A–JULY2008–REVISED OCTOBER2011 5-A,WIDE INPUT RANGE,STEP-DOWN SWIFT™CONVERTER

Check for Samples:TPS5450-Q1

FEATURES APPLICATIONS

•Qualified for Automotive Applications•High-Density Point-of-Load Regulators

•Wide Input Voltage Range:5.5V to36V•LCD Displays,Plasma Displays

•Up to5-A Continuous(6-A Peak)Output•Battery Chargers

Current•12-V/24-V Distributed Power Systems

•High Efficiency Greater than90%Enabled by

110-mΩIntegrated MOSFET Switch DESCRIPTION

As a member of the SWIFT™family of DC/DC •Wide Output Voltage Range:Adjustable Down

regulators,the TPS5450is a high-output-current to1.22V with1.5%Initial Accuracy

PWM converter that integrates a low-resistance •Internal Compensation Minimizes External

high-side N-channel MOSFET.Included on the Parts Count substrate with the listed features are a

•Fixed500-kHz Switching Frequency for Small high-performance voltage error amplifier that provides Filter Size tight voltage regulation accuracy under transient

conditions,an undervoltage-lockout circuit to prevent •18-μA Shutdown Supply Current

start-up until the input voltage reaches 5.5V,an •Improved Line Regulation and Transient internally set slow-start circuit to limit inrush currents, Response by Input Voltage Feed Forward and a voltage feed-forward circuit to improve the •System Protected by Overcurrent Limiting,transient ing the ENA pin,shutdown

supply current is reduced to18μA typically.Other Overvoltage Protection,and Thermal

features include an active-high enable,overcurrent Shutdown

limiting,overvoltage protection,and thermal •–40°C to125°C Operating Junction

shutdown.To reduce design complexity and external Temperature Range component count,the TPS5450feedback loop is

•Available in Small Thermally Enhanced8-Pin internally compensated.

SOIC PowerPAD™Package

The TPS5450device is available in a thermally •For SWIFT™Documentation,Application enhanced,8-pin SOIC PowerPAD™package.TI Reports and Design Software,See the TI provides evaluation modules and software tools to aid Website at /swift in 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,PowerPAD are trademarks of Texas Instruments.

PRODUCTION DATA information is current as of publication date.Copyright©2008–2011,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.