TPS54232

具有 Eco-mode 的 3.5V 至 28V 输入、2A、1MHz 降压转换器

The is a 28-V, nonsynchronous buck converter that integrates a low RDSon 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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3.5-V to 28-V Input Voltage Range

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Adjustable Output Voltage Down to 0.8 V

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Integrated 80-mΩ High-Side MOSFET Supports

up to 2-A Continuous Output Current

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High Efficiency at Light Loads with a Pulse

Skipping Eco-Mode

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Fixed 1-MHz Switching Frequency

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Typical 1-µA Shutdown Quiescent Current

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Adjustable Slow-Start Limits Inrush Currents

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Programmable UVLO Threshold

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Overvoltage Transient Protection

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Cycle-by-Cycle Current Limit, Frequency Fold

Back and Thermal Shutdown Protection

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Available in 8-Pin SOIC Package

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Supported by WEBENCH Software Tool

http://www.ti.com/lsds/ti/analog/webench/overview.page