TPS54232DR Switching Voltage Regulators LM4674ATLX/NOPB RDA5868 PMIC Power Management ICs

Features

• 3.5-V 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 1-MHz 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 8-Pin SOIC Package

• Supported by WEBENCH® Software Tool

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 TPS54232 is a 28-V, nonsynchronous 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 TPS54232 is available in an 8-pin SOIC package.

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