LM74501-Q1 Texas Instruments MOSFET (N-Channel) (SOT23 (8-Pin)) In Stock
Texas Instruments LM74501-Q1 is an AEC-Q100 automotive-grade reverse polarity protection controller in an 8-pin SOT-23 package. It drives an external N-channel MOSFET for low-loss reverse polarity protection, supporting supply voltages up to 40 V. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (8-Pin)
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- LM74501-Q1 Datasheet PDF
- Category
- MOSFET (N-Channel)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- AEC-Q100 qualified automotive reverse polarity protection controller rated for up to 40 V supply rails
- Works with external N-channel MOSFET for lower conduction loss versus diode-based or P-channel MOSFET solutions
- Compact 8-pin SOT-23 package minimizes board area in space-constrained automotive and industrial power-entry circuits
Applications
The LM74501-Q1 is designed for automotive battery-connected systems where reverse polarity events during jump-start or battery swap must be safely blocked without excessive power dissipation. Paired with a low-RDS(on) N-channel MOSFET, it replaces bulky Schottky diodes or P-channel FET designs in ECU power-entry stages, telematics units, and 12 V/24 V automotive accessories. Its AEC-Q100 qualification also makes it suitable for industrial power supplies and 12 V to 40 V DC equipment requiring robust reverse-polarity immunity.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What maximum supply voltage does the LM74501-Q1 reverse polarity controller support?
The LM74501-Q1 supports input supply voltages up to 40 V, covering standard 12 V and 24 V automotive battery systems as well as 24 V industrial rails. This wide voltage range allows a single controller to be used across light-vehicle, heavy-truck, and industrial equipment applications without redesign.
Why use an N-channel MOSFET with the LM74501-Q1 instead of a P-channel MOSFET or a Schottky diode?
An N-channel MOSFET paired with the LM74501-Q1 achieves significantly lower RDS(on) than equivalent P-channel devices at the same die size, reducing conduction losses and heat dissipation at high currents. Compared to a Schottky diode, the active MOSFET approach eliminates the fixed 0.3 V to 0.5 V forward-voltage drop, saving hundreds of milliwatts in 12 V automotive circuits carrying 5 A or more.
Is the LM74501-Q1 suitable for jump-start events in automotive ECU designs?
Yes, the LM74501-Q1 is AEC-Q100 Grade 1 qualified and engineered to handle automotive transients including reverse-polarity conditions during battery swap or jump-start scenarios. It turns off the gate of the external N-channel MOSFET within microseconds of detecting a negative supply event, protecting downstream ECU circuitry rated for 12 V nominal from damage during -14 V to -40 V reverse transients.
What package does the LM74501-Q1 come in and what are its physical dimensions?
The LM74501-Q1 is housed in an 8-pin SOT-23 package, which measures approximately 3 mm x 3 mm with a 0.95 mm pitch. This small footprint allows it to be placed close to the power-entry connector on automotive ECU and telematics boards, minimizing trace inductance between the controller, external MOSFET, and input capacitors.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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