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XC9280 - Step-Down DC/DC Converter

Description

The XC9280 series is 18V bootstrap synchronous step-down DC/DC converter with built-in Nch-Nch driver transistors, the operating voltage range is 4.5V~18.0V, designed to allow the use of ceramic capacitors.

Features

  • Input Voltage Range Output Voltage Range FB Voltage Oscillation Frequency Output Current Control Method Soft-start Time Protection function Output Capacitor Package Environmentally Friendly : 4.5V ~ 18V (Absolute Max 20V) : 1.8V ~ 7.0V or VIN x 0.7 : 0.75V±1.5% : 1.2MHz : 3A peak 2.0A DC (VIN=12V, VOUT=5V) : PWM/PFM Automatic : 0.95ms Adjustable by RC : UVLO Over Current Protection (Automatic Recovery) Thermal Shutdown : Ceramic Capacitor : TSOT-26 : EU RoHS Compliant, Pb Free.

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Full PDF Text Transcription

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XC9280 Series 18V Operation 3.0A Synchronous Step-Down DC/DC Converters ETR05064-003 ■GENERAL DESCRIPTION The XC9280 series is 18V bootstrap synchronous step-down DC/DC converter with built-in Nch-Nch driver transistors, the operating voltage range is 4.5V~18.0V, designed to allow the use of ceramic capacitors. 0.75V reference voltage source is incorporated in the IC, and the output voltage can be set to a value from 1.8V to 7.0V using external resistors (RFB1, RFB2). Switching frequency is 1.2MHz. In PWM/PFM automatic switchover control, IC can change the control method between PWM and PFM based on the output current requirement and as a result IC can achieve high efficiency over the full load range. XC9280 has a fixed internal soft start time which is 0.95ms (TYP.
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