Smart Diode Controller

36V, Smart Diode Controller with Reverse Protection, AEC-Q100 Qualified

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 (VIN), which makes the MPQ5850 well-suited for cold-crank conditions in automotive applications.

The 4μA shutdown current also makes the device ideal for battery-powered 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 VIN. An open-drain, power good (PG) 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:

• -36V Blocking Voltage
• Load Dump Up to 42V
• Cold Crank Down to 0V
• Rectifies AC Frequency Up to 100kHz
• Strong Gate Drive Ability: 170mA Pull-Up and 430mA Pull-Down

       Extended Vehicle Battery Life:

• Low 4μA Quiescent Current (IQ) in Standby Mode
• Low 30μA IQ in Steady State

       Reduced Board Size:

• Available in a TSOT23-8 (2mmx3mm) Package

       Additional Features:

• 20mV Ultra-Low Dropout
• Integrates a Boost Converter
• Power Good (PG) Indication for RES Out of Regulation, Fast Pull-Up, and Part Disabling
• Available in AEC-Q100 Grade 1

Application

ADAS

Block Diagram