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

Key Features
  • 5.5V to 16V gate drive supply voltage range
  • Advanced adaptive-dead-time
  • Intelligent shoot-through protection
    • MIC4605-1: Dual TTL inputs
    • MIC4605-2: Single PWM input
  • Enable input for on/off control
  • On-chip bootstrap diode
  • Fast 35ns propagation times
  • Drives 1000pF load with 20ns rise and fall times
  • Low power consumption: 135µA quiescent current
  • Separate high- and low-side undervoltage protection
  • –40°C to +125°C junction temperature range
Typical Application

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  • Fans
  • Power inverters
  • High-voltage step-down regulators
  • Half, full, and 3-phase bridge motor drives
  • Appliances
  • E-bikes

General Description

The MIC4605 is an 85V half-bridge MOSFET driver that features adaptive-dead-time and shoot-through protection. The adaptive-dead-time circuitry actively monitors the half-bridge outputs to minimize the time between high-side and low-side MOSFET transitions, thus maximizing 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. Additionally, the MIC4605’s adjustable gate drive sets the gate drive voltage to VDD for optimal MOSFET RDS(ON), which minimizes power loss due to the MOSFET’s RDS(ON).

The MIC4605 is available in an 8-pin SOIC package and a tiny 10-pin 2.5mm × 2.5mm TDFN package. Both packages have an operating junction temperature range of –40°C to +125°C.

Ordering Information
Part Number Temperature Range Package
MIC4605-1YMT -40°C to +125°C 10-Pin 2.5mm x 2.5mm TDFN
MIC4605-2YMT -40°C to +125°C 10-Pin 2.5mm x 2.5mm TDFN
MIC4605-1YM -40°C to +125°C 8-Pin SOIC
MIC4605-2YM -40°C to +125°C 8-Pin SOIC

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