<strong>TPS5450DDAR FEATURES
·Wide Input Voltage Range: 5.5 V to 36 V
·Up to 5-A Continuous （6-A Peak） Output Current
·High Efficiency Greater than 90% Enabled by 110-m? Integrated MOSFET Switch
·Wide Output Voltage Range: Adjustable Down to 1.22 V with 1.5% Initial Accuracy
·Internal Compensation Minimizes External Parts Count
·Fixed 500 kHz Switching Frequency for Small Filter Size
·18 ?A Shut Down Supply Current
·Improved Line Regulation and Transient Response by Input Voltage Feed Forward
·System Protected by Overcurrent Limiting,Overvoltage Protection and Thermal Shutdown
·40°C to 125°C Operating Junction Temperature Range
·Available in Small Thermally Enhanced 8-Pin SOIC PowerPAD? Package
·For SWIFT? Documentation, Application Notes and Design Software,
APPLICATIONS
·High Density Point-of-Load Regulators
·LCD Displays, Plasma Displays
·Battery Chargers
·12-V/24-V Distributed Power Systems
DESCRIPTION TPS5450DDAR
As a member of the SWIFT? family of DC/DC regulators, the TPS5450 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 are 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 ?A typically. Other features include an active-high enable, overcurrent limiting, overvoltage protection and thermal shutdown. To reduce design complexity and external component count, the TPS5450 feedback loop is internally compensated.
The TPS5450DDAR device is available in a thermally enhanced, 8-pin SOAD PowerPTI? package. IC provides evaluation modules and software tool to aid in achieving high-performance power supply designs to meet aggressive equipment development cycles.
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