IR3840MTRPBF

The IR3840 SupIRBuckTM is an easy-to-use, fully integrated and highly efficient DC/DC synchronous Buck regulator. The MOSFETs copackaged with the on-chip PWM controller make IR3840 a space-efficient solution, providing accurate power delivery for low output voltage applications. IR3840 is a versatile regulator which offers programmability of start up time, switching frequency and current limit while operating in wide input and output voltage range. The switching frequency is programmable from 250kHz to 1.5MHz for an optimum solution. It also features important protection functions, such as Pre-Bias startup, hiccup current limit and thermal shutdown to give required system level security in the event of fault conditions.

Applications

• Server Applications
• Storage Applications
• Embedded Telecom Systems
• Distributed Point of Load Power Architectures
• Netcom Applications
• Computing Peripheral Voltage Regulators
• General DC-DC Converters

Key features

• Greater than 96% Maximum Efficiency
• Wide Input Voltage Range 1.5V to 16V
• Wide Output Voltage Range 0.7V to 0.9*Vin
• Continuous 12A Load Capability
• Integrated Bootstrap-diode
• High Bandwidth E/A for excellent transient performance
• Programmable Switching Frequency up to 1.5MHz
• Programmable Over Current Protection (Hiccup)
• PGood output
• Precision Reference Voltage (0.7V, +/ -1%)
• Programmable Soft-Start
• Enable Input with Voltage Monitoring Capability
• Enhanced Pre-Bias Start-up
• Seq input for Tracking applications
• -40°C to 125°C operating junction temperature
• Thermal Protection
• Pin compatible option for 4A and 8A devices
• 5mm x 6mm Power QFN package, 0.9mm height
• Lead-free, halogen-free and RoHS compliant