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LM74700QDBVRQ1

Automotive ideal diode controller, 65V, 26mV drop, AEC-Q100, SOT-23-6

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Manufacturer Part：

LM74700QDBVRQ1

Package：

SOT-23-6 (2.9 x 1.6 x 1.1 mm)

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Description

Product Overview

The LM74700QDBVRQ1 from Texas Instruments is an automotive-qualified ideal diode controller that drives an external N-channel MOSFET to emulate a near-ideal Schottky diode. In a SOT-23-6 package, it provides reverse polarity protection and power supply ORing with only 26mV forward voltage drop.

Key Specifications

Operating Voltage 3V ~ 65V
Forward Voltage Drop 26mV (regulated)
Reverse Current 3uA max
Gate Drive Voltage 12V above ANODE
Quiescent Current 155uA (operating)
Qualification AEC-Q100 Grade 1
Operating Temperature -40°C ~ 125°C
Package SOT-23-6

Features

  • AEC-Q100 Grade 1 automotive qualified
  • 65V maximum operating voltage
  • 26mV regulated forward voltage drop
  • 3uA max reverse leakage current
  • 12V gate drive for standard N-channel MOSFETs
  • Fast reverse current protection (0.5us)

Applications

  • Automotive battery reverse polarity protection
  • Power supply ORing and redundancy
  • Battery backup switchover systems
  • Industrial 24V bus protection
  • LED lighting power protection

The LM74700QDBVRQ1 is an automotive-qualified ideal diode controller from Texas Instruments that drives an external N-channel MOSFET to emulate an ideal diode with just 26mV forward voltage drop. AEC-Q100 Grade 1 qualified, it operates from 3V to 65V, covering the full automotive battery voltage range including load dump transients. The controller regulates the MOSFET gate to maintain 26mV across the MOSFET during forward conduction, automatically turning off the MOSFET within 0.5us when reverse current is detected. This eliminates the power dissipation and voltage drop of conventional Schottky diodes.

The LM74700 monitors the voltage across the external N-channel MOSFET between the ANODE and CATHODE pins. When forward current flows (ANODE > CATHODE), the controller drives the GATE pin 12V above ANODE to fully enhance the MOSFET, achieving near-zero voltage drop. A regulation loop maintains 26mV across the MOSFET for smooth current handling. When reverse current is detected (CATHODE > ANODE), the gate is pulled low within 0.5us, blocking reverse current. An integrated charge pump provides the gate drive voltage above the anode supply rail without external components.

Pin Name Type Function
1 GATE Output MOSFET gate drive
2 CATHODE Input Sense output / MOSFET drain
3 EN Input Enable (active high)
4 GND Power Ground
5 VIN Input Supply input (3-65V)
6 ANODE Input Sense input / MOSFET source
  • Automotive 12V/24V battery reverse polarity protection
  • Redundant power supply ORing in ADAS systems
  • Industrial 24V bus reverse current blocking
  • Battery backup hot-swap protection
  • LED driver supply polarity protection
Manufacturer Part Number Package Notes
TI LM74701QDBVRQ1 SOT-23-6 Higher gate drive, 65V
Analog Devices LTC4359IMS8#PBF 8-MSOP Ideal diode controller, 80V
Maxim MAX16141 6-TDFN Ideal diode, 5.5V-60V
Infineon BTS50015-1TAE TO-252 Smart high-side switch alternative
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Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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