IR3891

Dual output, 4A/Phase, Highly Integrated SupIRBuck® Single-Input Voltage, Synchronous Buck Regulator IR3891 FEATURES Single 5V to 21V application Wide Input Voltage Range from 1V to 21V with external Vcc Output Voltage Range: 0.5V to 0.86*PVin Dual output, 4A/Phase Enhanced Line/Load Regulation with Feed- Forward Programmable Switching Frequency up to 1.5MHz Internal Digital Soft-Start Enable input with Voltage Monitoring Capability Thermally compensated current limit and Hiccup Mode Over Current Protection External synchronization with Smooth Clocking Precision Reference Voltage (0.5V +/-1%) Seq pin for Sequencing Applications Integrated MOSFETs, drivers and Bootstrap diode Thermal Shut Down Open Feedback Line Protection Over Voltage Protection Interleaved Phases to reduce Input Capacitors Monotonic Start-Up Operating Junction Temp: -40oCregulator. The onboard PWM controller and MOSFETs make IR3891 a space-efficient solution, providing accurate power delivery for low output voltage. IR3891 is a versatile regulator which offers programmability of switching frequency and a fixed current limit while operating in wide input and output voltage range. The switching frequency is programmable from 300kHz to 1.5MHz for an optimum solution. It also features important...