LM74610-Q1 (ACTIVE)

Zero Iq Reverse Polarity Protection Smart Diode Controller

Zero Iq Reverse Polarity Protection Smart Diode Controller - LM74610-Q1


The LM74610-Q1 is a controller device that can be used with an N-Channel MOSFET in a reverse polarity protection circuitry. It is designed to drive an external MOSFET to emulate an ideal diode rectifier when connected in series with a power source. A unique advantage of this scheme is that it is not referenced to ground and thus has Zero Iq.

The LM74610-Q1 controller provides a gate drive for an external N-Channel MOSFET and a fast response internal comparator to discharge the MOSFET Gate in the event of reverse polarity. This fast pull-down feature limits the amount and duration of reverse current flow if opposite polarity is sensed. The device design also meets CISPR25 Class 5 EMI specifications and automotive ISO7637 transient requirements with a suitable TVS diode.


  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Exceeds HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C4B
  • Maximum reverse voltage of 45 V
  • No Positive Voltage limitation to Anode Terminal
  • Charge Pump Gate Driver for External N-Channel
  • Lower Power Dissipation than Schottky
    Diode/PFET Solutions
  • Low Reverse Leakage Current
  • Zero IQ
  • Fast 2-µs Response to Reverse Polarity
  • –40°C to +125°C Operating Ambient Temperature
  • Can be Used in OR-ing Applications
  • Meets CISPR25 EMI Specification
  • Meets Automotive ISO7637 Transient
    Requirements with a Suitable TVS Diode
  • No Peak Current Limit

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Parametrics Compare all products in ORing and Smart Diodes

Vabsmin (Min) (V)
Vabsmax (Max) (V)
Iq (Typ) (mA)
Iq (Max) (mA)
IGate Source (Typ) (uA)
IGate Source (Max) (uA)
IGate Sink (Typ) (mA)
IGate Pulsed (Typ) (A)
Operating Temperature Range (C)
IReverse (Typ) (uA)
VSense Reverse (Typ) (mV)
Design Support
Channel(s) Controlled (#)
VGS (Max) (V)
LM74610-Q1 LM5050-1-Q1 LM74670-Q1 LM74700-Q1
-45    -0.3    -45    -65   
  100    42    65   
0    0.40    0    0.03   
0    0.79    0    3   
10    31    70    50   
0.01    2.8    0.07    0.001   
0.1    2.8    0.1    1.5   
-40 to 125    -40 to 125
-40 to 150   
-40 to 125    -40 to 125   
N/A    AUX Input    N/A    Enable   
110    N/A    110     
20    -28 /-41    20    5   
Calculation Tool
Reference Design
Simulation Model   
Simulation Model   
Calculation Tool
Reference Design
Simulation Model   
Automotive    Automotive    Automotive    Automotive   
1    1    1    1   
2.5    14    2.5