IR3823 Integrated Voltage Regulator

IR3823 Integrated Voltage Regulator

The IR3823 SupIRBuck® is an integrated voltage regulator designed for space-constrained, energy-efficient netcom, server, and storage applications. The IR3823 delivers up to 3 A with superior efficiency in an ultra-compact 3.5 x 3.5 mm package. Efficiencies in excess of 97.5% are obtainable for designs converting power from a 6 V input to a 4.8 V output. The extremely high initial efficiency allows switching at up to 1.5 MHz from a 12 V supply to enable a complete 3 A power supply solution in less than 130 mm². Featuring constant frequency and virtually jitter-free operation with synchronization capability, the new device is well suited to noise-sensitive applications, while the higher bandwidth reduces component count to shrink PCB footprint. A tri-level selectable soft-start feature is also offered for ease of sequencing.

Features
  • Single input voltage range from 5 V to 21 V
  • Wide input voltage range from 1.0 V to 21 V with external Vcc bias voltage
  • Output voltage from 0.6 V to 0.86% of PVin
  • Enhanced line/load regulation with feed forward
  • Programmable switching frequency up to 1.5 MHz
  • Three user selectable soft-start time options
  • Thermally compensated current limit with robust hiccup mode over current protection
  • Synchronization to an external clock
  • Precise reference voltage (0.6 V ± 0.6%)
  • Open-drain PGood indication
  • Output over voltage protection
  • Enable input with under voltage lockout (UVLO)
  • Vcc under-voltage lockout (UVLO)
  • Enhanced pre-bas start-up
  • Integrated MOSFET drivers and bootstrap diode
  • Thermal shut down
  • -40ºC to 125ºC operating junction temperature
  • 3.5 mm x 3.5 mm PQFN package
  • Lead-free, Halogen-free, and RoHS6 compliant

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