TPS54331-Q1

TPS54331-Q1 www.ti.com SLVSAB5 – NOVEMBER 2010 3-A, 28-V INPUT, STEP-DOWN SWIFT™ DC/DC CONVERTER WITH Eco-Mode™ Check for Samples: TPS54331-Q1 FEATURES 1 2 Qualified for Automotive Applications 3.5V to 28V Input Voltage Range Adjustable Output Voltage Down to 0.8V Integrated 80 mΩ High Side MOSFET Supports up to 3A Continuous Output Current High Efficiency at Light Loads with Pulse Skipping Eco-mode™ Control Fixed 570kHz Switching Frequency Typical 1mA 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 Supported by SwitcherPro™ Software Tool (http://focus.ti.com/docs/toolsw/folders/print/s witcherpro.html) For SWIFT™ Documentation, See the TI Website at www.ti.com/swift 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 DESCRIPTION The TPS54331 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 mA shutdown supply current allows the device to be used in battery powered applications. Current mode control with internal slope com...