Infineon Technologies IR3897

Description

The IR3897 SupIRBuckTM is an easy‐to‐use, fully integrated and highly efficient DC/DC regulator. The onboard PWM controller and MOSFETs makeIR3897 a space‐efficient solution, providing accurate power delivery.IR3897 is a versatile regulator which offers programmability of switching frequency and 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 asPre‐Bias startup, thermally compensated current limit, over voltage protection 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 1.0V 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 +/‐4A)
• 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: 4mm x 5mm PQFN
• Lead‐free, Halogen‐free and RoHS Compliant

Typical applications

• Storage Applications
• Embedded Telecom Systems
• Distributed Point of Load Power Architectures
• Server Applications
• Netcom Applications

More information

• Datasheet
• IC product information