SUNNYVALE, CA -Maxim Integrated Products introduces the
MAX6495-MAX6499 overvoltage protection circuits that operate as a switch controller to either disconnect or limit
the output voltage to a load during an overvoltage condition. The circuits turn off an external n-channel MOSFET
with an internal 100mA pulldown current when the monitored voltage exceeds its overvoltage threshold. These
low-power devices consume only 20 microamps of quiescent current and operate from 5.5V to 72V, making them suitable
for automotive, industrial, and server applications.
features a latch-off mode that disables the MOSFET until the power or shutdown input is cycled. The MAX6498 features
an autoretry mode that attempts to turn on the MOSFET when the voltage falls to 130mV.
Three of the
devices (MAX6495/MAX6496/MAX6499) can also be configured as a voltage limiter that provides a regulated output to
allow for continuous operation. An internal charge pump on all circuits provides a 10V gate-to-source enhancement to
minimize drain-to-source resistance during normal operation.
Other features include a POK indicator
(MAX6497/MAX6498) and the control logic for driving a p-channel MOSFET to provide reverse battery protection. All
devices offer a shutdown input. These protection circuits are offered in a small 3mm x 3mm TDFN package and are
fully specified from -40 degrees Celsius to 125 degrees Celsius. Prices for these devices start at $1.23 (1000-up,