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Reverse Voltage Protected Ideal diode controller
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The DIODES™ AP74700Q is an automotive-compliant ideal diode MOSFET controller, which when used with an appropriate external N-channel power MOSFET provides a low-loss 20mV forward voltage drop rectifier in unidirectional power paths as well as reverse voltage.
AP74700Q supports wide input operation range from 3.2V to 65V, allowing control of many popular DC rail voltage such as 12V, 24V or higher automotive battery systems. The 3.2V input voltage support fits for severe cold crank requirements in automotive systems. The AP74700Q can withstand and protect the loads from reverse voltages down to -65V.
AP74700Q, with its built-in charge pump, controls the GATE of MOSFET to regulate the MOSFET’s forward voltage drop to around 20mV. Its internal gate driver quickly turns off the MOSFET during a reverse current event and ensures there is no DC reverse current flow. Fast reverse current blocking response of < 0.75µs makes it suitable for systems with output voltage holdup requirements during ISO 7637 pulse testing, as well as power fail and input micro-short conditions.
The high 65V voltage rating of AP74700Q simplifies the system design for automotive ISO 7637 protection. With the enable pin low, the controller is off and draws about typical 0.7µA of current.
The AP74700Q is available in SOT26 package.
|Compliance (Only Automotive supports PPAP)||Automotive|
|Maximum Continuous Output Current (A)||External NMOS|
|(MAX) Maximum Current Limit Fixed (A)||External NMOS|
|Enable Logic||Active High|
|Minimum Operating Voltage (V)||4|
|Maximum Operating Voltage (V)||60|
|Quiescent Current Typ (µA)||80|
|RDS(ON) (VIN = 5V) Typ (mΩ)||External|
|Reverse Current Block||Yes|
|Operating Ambient Temperature Range (°C)||-40 to 125|