DESCRIPTION
The MPQ5850 is a smart diode controller that
can drive an external N-channel MOSFET to
replace a Schottky diode for reverse input
protection. The device’s 20mV ultra-low dropout
minimizes power loss and enables a low
minimum input voltage, which makes the
MPQ5850 well-suited for cold-crank conditions
in automotive applications. The 4μA shutdown
current also makes the device ideal for batterypowered
applications. The ultra-fast transient
response meets stringent ISO16750
requirements.
The MPQ5850 integrates an internal boost to
provide a boost voltage that turns on the external
N-channel MOSFET, even at a low input voltage
(VIN). An open-drain, power good signal
indicates when the external N-channel MOSFET
is fully on.
The MPQ5850 is available in a TSOT23-8
(2mmx3mm) package.

FEATURES
• Built to Handle Tough Automotive
Transients:
o -36V Blocking Voltage
o Load Dump Up to 42V
o Cold Crank Down to 0V
o Rectifies AC Frequency Up to 100kHz
o Strong Gate Drive Ability: 170mA Pull-
Up and 430mA Pull-Down
• Extended Vehicle Battery Life:
o Low Quiescent Current in Standby
Mode (4μA)
o Low Quiescent Current in Steady State
(30μA)
• Reduced Board Size:
o Available in a TSOT23-8 (2mmx3mm)
Package
• Additional Features:
o 20mV Ultra-Low Dropout
o Integrates a Boost Converter
o Power Good (PG) Indication for RES
Out of Regulation, Fast Pull-Up, and
Part Disabling
o Available in AEC-Q100 Grade 1

APPLICATIONS
• Automotive System Protection
• Automotive ADAS Systems (Cameras)
• Automotive Infotainment Systems, Including
Digital Clusters and Head Units
• Battery-Powered Systems