1 Features
1• 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 2 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 by•
Cycle-by-Cycle Current Limit, Frequency Fold
Back and Thermal Shutdown Protection
• Available in Easy-to-Use SOIC8 Package
• Supported by WEBENCH® Software Tool
(www.TI.com/WEBENCH)

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 TPS54231 device is a 2-V, 2-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 fold back and
thermal shutdown protect the device and the load in
the event of an overload condition. The TPS54231 device is available in an 8-pin SOIC package that has
been internally optimized to improve thermal
performance.