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IR3895 Datasheet(PDF) 1 Page - International Rectifier |
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IR3895 Datasheet(HTML) 1 Page - International Rectifier |
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1 / 45 page  - 1 -P JANUARY 18, 2013 | DATA SHEET| Rev 3.4 1 IR3895 16A Highly Integrated SupIRBuck Single‐Input Voltage, Synchronous Buck Regulator PD‐97746 FEATURES Single 5V to 21V application Wide Input Voltage Range from 1.0V to 21V with external Vcc Output Voltage Range: 0.5V to 0.86×Vin Enhanced Line/Load Regulation with Feed‐Forward Programmable Switching Frequency up to 1.5MHz Internal Digital Soft‐Start/Soft‐Stop Enable input with Voltage Monitoring Capability Thermally Compensated Current Limit with robust hiccup mode over current protection Smart internal LDO to improve light load and full load efficiency External Synchronization with Smooth Clocking Enhanced Pre‐Bias Start‐Up Precision Reference Voltage (0.5V+/‐0.5%) with margining capability Vp for Tracking Applications (source/sink capability ±16A) Integrated MOSFET drivers and Bootstrap Diode Thermal Shut Down Programmable Power Good Output with tracking capability Monotonic Start‐Up Operating temp: ‐40oC < Tj < 125oC Small Size: 5mm x 6mm PQFN Lead‐free, Halogen‐free and RoHS Compliant BASIC APPLICATION Figure 1: IR3895 Basic Application Circuit DESCRIPTION The IR3895 SupIRBuck TM is an easy‐to‐use, fully integrated and highly efficient DC/DC regulator. The onboard PWM controller and MOSFETs make IR3895 a space‐efficient solution, providing accurate power delivery. IR3895 is a versatile regulator which offers programmable of switching frequency and the fixed internal current limit while operates 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 protection functions, such as Pre‐Bias startup, thermally compensated current limit, over voltage protection and thermal shutdown to give required system level security in the event of fault conditions. APPLICATIONS Netcom Applications Embedded Telecom Systems Server Applications Storage Applications Distributed Point of Load Power Architectures Figure 2:IR3895 Efficiency |
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