XRP6124

January 2011 XRP6124 Non-Synchronous PFET Step-Down Controller Rev. 1.1.0 GENERAL DESCRIPTION The XRP6124 is a non synchronous step down (buck) controller for up to 5Amps point of loads. A wide 3V to 30V input voltage range allows for single supply operations from industry standard 3.3V, 5V, 12V and 24V power rails. With a proprietary Constant On-Time (COT) control scheme, the XRP6124 provides extremely fast line and load transient response while the operating frequency remains nearly constant. It requires no loop compensation hence simplifying circuit implementation and reducing overall component count. The XRP76124 also implements an emulated ESR circuitry allowing usage of ceramic output capacitors and insuring stable operations without the use of extra external components. Built-in soft start prevents high inrush currents while under voltage lock-out and output short protections insure safe operations under abnormal operating conditions. The XRP6124 is available in a RoHS compliant, green/halogen free space-saving 5-pin SOT23 package. TYPICAL APPLICATION DIAGRAM APPLICATIONS Point of Load Conversions Audio-Video Equipments Industrial and Medical Equipments Distributed Power Architecture FEATURES 5A Point-of-Load Capable − Down to 1.2V Output Voltage Conversion Wide Input Voltage Range − 3V to 18V: XRP6124 − 4.5V to 30V: XRP6124HV Constant On-Time Operations − Constant Frequency Operations − No External Compensation − Supports Ceramic Output Capacitors B...