●DESCRIPTION
●The IR3846 SupIRBuck® is an easy-to-use, fully integrated and highly efficient DC/DC regulator. The onboard PWM controller and MOSFETs make IR3846 a space-efficient solution, providing accurate power delivery for low output voltage and high current applications.
●IR3846 is a versatile regulator which offers programmability of switching frequency and current limit while operating in wide input and output voltage range.
●The switching frequency is programmable from 300 kHz to 1.5MHz for an optimum solution. It also features important protection functions, such as Over Voltage Protection (OVP), Pre-Bias startup, hiccup current limit and thermal shutdown to give required system level security in the event of fault conditions.
●FEATURES
●• Single 5V to 21V application
●• Wide Input Voltage Range from 1.5V to 21V with external Vcc
●• Output Voltage Range: 0.6V to 0.86
●PVin
●• 0.5% accurate Reference Voltage
●• Enhanced line/load regulation with Feed-Forward
●• Programmable Switching Frequency up to 1.5MHz
●• Internal Digital Soft-Start
●• Enable input with Voltage Monitoring Capability
●• Remote Sense Amplifier with True Differential Voltage Sensing
●• Thermally compensated current limit and Hiccup Mode Over Current Protection
●• Smart LDO to enhance efficiency
●• Vp for tracking applications and sequencing
●• Vref is available externally to enable margining
●• External synchronization with Smooth Clocking
●• Dedicated output voltage sensing for power good indication and overvoltage protection which remains active even when Enable is low.
●• Enhanced Pre-Bias Start up
●• Body Braking to improve transient
●• Integrated MOSFET drivers and Bootstrap diode
●• Thermal Shut Down
●• Post Package trimmed rising edge dead-time
●• Programmable Power Good Output with tracking
●• Small Size 5mm x 7mm PQFN
●• Operating Junction Temp: -40oC • Lead-free, Halogen-free and RoHS Compliant
●APPLICATIONS
●• Netcom Applications
●• Embedded Telecom Systems
●• Server Application
●• Distributed Point of Load Power Architectures
●• Storage Applications
