ChongMing Group (HK) Int'l Co., Ltd
CHONGMING GROUP (HK) INT'L CO., LTD.
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TPS54331DR Power Path Management IC Switching Voltage Regulators 3A 28V In Step Down SWIFT DC/DC Cnvrtr
1 Features
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-modeTM
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 PowerPADTM Package
Create a Custom Design with WEBENCH Tools
2 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
3 Description
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.