Micrel – MIC4605: 85V Half Bridge MOSFET Driver with Adaptive Dead Time and Shoot-Through Protection


The MIC4605 is a 85V half bridge MOSFET driver that features adaptive dead time and shoot-through protection. The adaptive dead time circuitry actively monitors the half bridge to minimize the time between high and low side MOSFET transitions, which maximizes power efficiency. Anti-shoot-through circuitry prevents erroneous inputs and noise from turning both MOSFETs on at the same time. The MIC4605 also offers a wide 5.5V to 16V operating supply range to maximize system efficiency. The low 5.5V operating voltage allows longer run times in battery-powered applications.


  • Advanced adaptive dead time
  • MIC4605-1 with dual TTL inputs
  • MIC4605-2 with single PWM input
  • Fast 35ns propagation times
  • 135µA quiescent current
  • Separate high and low side under-voltage protection
  • Intelligent shoot-through protection
  • Enable input for on/off control
  • On-chip bootstrap diode
  • Drives 1000pF load with 20ns rise and fall times
  • 8-pin SOIC and 10-pin TDFN packages
  • 1k MSRP: $0.55 US