The TPS54331 device is a 28-V, 3-A non-synchronous buck converter that integrates a low RDS(on) high-side MOSFET. To increase efficiency at light loads, a pulse skipping Eco-mode feature is automatically activated. Furthermore, the 1-µA shutdown supply-current allows the device to be used in battery-powered applications. Current mode control with internal slope compensation simplifies the external compensation calculations and reduces component count while allowing the use of ceramic output capacitors. A resistor divider programs the hysteresis of the input undervoltage lockout. An overvoltage transient protection circuit limits voltage overshoots during startup and transient conditions. A cycle-by-cycle current-limit scheme, frequency foldback and thermal shutdown protect the device and the load in the event of an overload condition. The TPS54331 device is available in an 8-pin SOIC package and 8-pin SO PowerPAD package that have been internally optimized to improve thermal performance.
● 3.5 to 28-V Input Voltage Range
● Adjustable Output Voltage Down to 0.8 V
● Integrated 80-mΩ High-Side MOSFET
●Supports up to 3-A Continuous Output
●Current
● High Efficiency at Light Loads With a
●Pulse Skipping Eco-mode™
● Fixed 570 kHz Switching Frequency
● Typical 1-µA Shutdown Quiescent
●Current
● Adjustable Slow-Start Limits Inrush
●Currents
● Programmable UVLO Threshold
● Overvoltage Transient Protection
● Cycle-by-Cycle Current Limit, Frequency Fold
●Back, and Thermal Shutdown Protection
● Available in Easy-to-Use SOIC8 Package or
●Thermally Enhanced SOIC8 PowerPAD™ Package
● Supported by WEBENCH® Software Tool
●(www.TI.com/WEBENCH)
● APPLICATIONS
● Consumer Applications such as Set-Top Boxes,
●CPE Equipment, LCD Displays, Peripherals, and
●Battery Chargers
● Industrial and Car-Audio Power Supplies
● 5-V, 12-V, and 24-V Distributed Power Systems
●WEBENCH Is a trademark of Texas Instruments
●All other trademarks are the property of their respective owners
