OR Controller N+1 ORing Controller N-Channel 1:1 TSOT-23-8

The LM74700QDDFRQ1 is an automotive-qualified ideal diode controller designed to provide reverse polarity protection, reverse current blocking, and input power path management in low-voltage DC power systems. The device controls an external N-channel MOSFET to emulate an ideal diode with very low forward voltage drop and reduced power dissipation compared to conventional Schottky diodes. It is optimized for automotive and industrial applications requiring robust protection against negative supply voltages, load dump conditions, and reverse battery events. The controller supports wide input voltage operation and integrates fast response circuitry for fault handling and transient protection. The device is suitable for power OR-ing, hot-swap, redundant power supply systems, and battery-connected applications where efficiency, reliability, and thermal performance are critical.

Engineering Specification

Device Type Automotive ideal diode controller with reverse battery and reverse current protection

Qualification Standard AEC-Q100 qualified for automotive applications

Control Topology External N-channel MOSFET controller for ideal diode operation

Input Voltage Range Supports wide automotive and industrial supply voltage ranges

Reverse Polarity Protection Provides protection against negative input voltage conditions and reverse battery connection

Reverse Current Blocking Actively prevents reverse current flow during output-to-input fault conditions

Forward Voltage Drop Low conduction losses through external MOSFET control for high-efficiency power delivery

Transient Protection Capable of handling automotive transient events including load dump conditions

Gate Drive Control Integrated gate driver optimized for fast MOSFET switching and protection response

Power Path Management Supports power OR-ing and redundant supply architectures

Fault Response Fast turn-off during reverse current and fault events

Current Consumption Low operating quiescent current suitable for always-on systems

Thermal Performance Designed for efficient thermal operation with external MOSFET-based power dissipation

Operating Temperature Range Automotive-grade extended temperature operation

Package Type Small-outline automotive package suitable for compact PCB layouts

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