TPS54331DR 3.5V to 28V Input, 3A, 570kHz Step-Down Converter with Eco-mode SOIC-8

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.

Features

• 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 foldback, and thermal shutdown protection
• Available in easy-to-use SOIC8 package or thermally-enhanced SOIC8 PowerPAD™ package
• Create a custom design using the TPS54331 with the WEBENCH Power Designer

Resources

Technical Datasheet 

User Guide