High Current IR3847 Gen3 SupIRBuck

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High Current IR3847 Gen3 SupIRBuck

• The IR3847 is a high current Point-of-Load (POL)
  integrated voltage regulator that extends the
  current rating of IRs third generation
  SupIRBuck family up to 25A in a compact 5x6mm
  package.

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• Advantages
• As a result of a new thermally enhanced package
  using copper clip and several proprietary
  innovations in the controller, the IR3847 can
  operate at 25A without heatsink, and reduces the
  PCB size by 20 compared to alternative
  integrated solutions and 70 compared to discrete
  solutions using a controller and power MOSFETs.
  A complete 25A power supply solution can be
  implemented in as little as 168mm2.
• As part of the new Gen3 SupIRBuck single input
  voltage (5V-25V) family, the IR3847 features a
  proprietary modulator scheme that reduces jitter
  by 90 compared to standard solutions. This has
  the dual benefit of reducing output voltage
  ripple by approximately 30 and allowing higher
  frequency/higher bandwidth operation for smaller
  size, better transient response and fewer output
  capacitors.
• The pinout is optimized for easy placement of
  bypass capacitors and the internal thermally
  compensated current limit offers three settings
  that allow programmability without extra
  components and layout complications.

REFERENCE DESIGNS

• Features
• Single 5V to 21V application
• Output voltage range 0.6V to 0.86PVin
• 0.5 accurate reference voltage
• Operating junction temp -40ºCltTjlt125ºC
• Programmable switching frequency up to 1.5 MHz
• True remote differential voltage sensing
• Smart LDO to enhance light load efficiency
• Vp for tracking applications
• Vref is available externally to enable margining
• External synchronization with smooth clocking
• Thermally compensated current limit and hiccup
  mode over current protection
• Overvoltage protection which remains active even
  when enable is low
• Programmable power good output with tracking
• Enhanced pre-bias startup
• Body braking to improve transient
• Integrated bootstrap diode
• Small size 5mm x 6mm PQFN
• Pb-Free (RoHS compliant)

PRESS RELEASE
HI-RES GRAPHIC
March 2013