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Low Iq, Always On Ideal Diode Controller


Package | PIN: DBV | 6
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $1.89
10-24 $1.69
25-99 $1.57
100-249 $1.37
250-499 $1.26
500-749 $1.06
750-999 $0.87
1000+ $0.80


  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results
    • Device Temperature Grade 1:
      –40°C to +125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification LevelC4B
  • 3.2-V to 65-V Input range (3.9 V start up)
  • –65 V Reverse Voltage Rating
  • Charge Pump for External N-Channel MOSFET
  • 20 mV ANODE to CATHODE Forward Voltage Drop Regulation
  • Enable Pin Feature
  • 3-µA Shutdown Current (EN=Low)
  • 60-µA Operating Quiescent Current (EN=High)
  • 1.5-A Peak Gate Turnoff Current
  • Fast Response to Reverse Current Blocking:
    < 1 µs
  • Meets Automotive ISO7637 Transient Requirements With a Suitable TVS Diode
  • 6-Pin SOT-23 Package 2.90 mm × 1.60 mm

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Texas Instruments  PLM74700QDBVTQ1

The LM74700-Q1 ideal diode controller operates in conjunction with an external N-channelMOSFET as an ideal diode rectifier for low loss reverse polarity protection. The wide supply inputrange of 3.2 V to 65 V allows control of many popular DC bus voltages. The device can withstand andprotect the loads from negative supply voltages down to –65 V. With a lowRDS(ON) external N-channel MOSFET, a very low forward voltage drop can beachieved while minimizing the amount of power dissipated in the MOSFET. For low load currents, theforward voltage is regulated to 20-mV to enable graceful shutdown of the MOSFET. External MOSFETswith 5 V or lower threshold voltage are recommended. With the enable pin low, the controller is offand draws approximately 3-µA of current.

The LM74700-Q1 controller provides a charge pump gate drive for an external N-channelMOSFET. The high voltage rating of LM74700-Q1 helps to simplify the system designs for automotiveISO7637 protection. Fast response to Reverse Current Blocking makes the device suitable for systemswith output voltage holdup requirements during ISO7637 pulse testing as well as power fail andbrownout conditions. The LM74700-Q1 is also suitable for ORing applications or ACrectification.