MIC4605
85V Half-Bridge MOSFET Drivers
with Adaptive Dead Time and
Shoot-Through Protection General Description Features 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 halfbridge 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. 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 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 batterypowered 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 Г— 2.5mm TDFN package. Both
packages have an operating junction temperature range of
–40°C to +125°C.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com. Applications Fans …