DCDC Converter 35A Highly Integrated SupIRBuck Single-Input Voltage, Synchronous SupIRBuck Buck Regulator IR3846 FEATURES DESCRIPTION Single 5V to 21V application The IR3846 SupIRBuck is an easy-to-use, fully Wide Input Voltage Range from 1.5V to 21V with integrated and highly efficient DC/DC regulator. The external Vcc onboard PWM controller and MOSFETs make IR3846 Output Voltage Range: 0.6V to 0.86*PVin a space-efficient solution, providing accurate power delivery for low output voltage and high current 0.5% accurate Reference Voltage applications. Enhanced line/load regulation with Feed-Forward Programmable Switching Frequency up to IR3846 is a versatile regulator which offers 1.5MHz programmability of switching frequency and current Internal Digital Soft-Start limit while operating in wide input and output voltage Enable input with Voltage Monitoring Capability range. Remote Sense Amplifier with True Differential Voltage Sensing The switching frequency is programmable from 300 Thermally compensated current limit and Hiccup kHz to 1.5MHz for an optimum solution. Mode Over Current Protection It also features important protection functions, such as Smart LDO to enhance efficiency Over Voltage Protection (OVP), Pre-Bias startup, Vp for tracking applications and sequencing hiccup current limit and thermal shutdown to give Vref is available externally to enable margining required system level security in the event of fault External synchronization with Smooth Clocking conditions. Dedicated output voltage sensing for power good indication and overvoltage protection which remains active even when Enable is low. APPLICATIONS Enhanced Pre-Bias Start up Body Braking to improve transient Netcom Applications Integrated MOSFET drivers and Bootstrap diode Embedded Telecom Systems Thermal Shut Down Server Application Post Package trimmed rising edge dead-time Distributed Point of Load Power Architectures Programmable Power Good Output with tracking Small Size 5mm x 7mm PQFN Storage Applications o o Operating Junction Temp: -40 C<Tj<125 C Lead-free, Halogen-free and RoHS Compliant ORDERING INFORMATION Base Part Standard Pack Orderable Part Package Type Form Quantity Number Number IR3846 PQFN 5mm x 7mm Tape and Reel 4000 IR3846MTRPBF 1 Rev 3.8 March 5, 2020 IR3846 BASIC APPLICATION Figure 1: IR3846 Basic Application Circuit Figure 2: Efficiency Vin=12V, Fsw=600kHz PIN DIAGRAM 5mm X 7mm POWER QFN Top View 2 Rev 3.8 March 5, 2020