Product details

Vin (Min) (V) 3.2 Vin (Max) (V) 65 Features Enable Iq (Typ) (mA) 0.08 Iq (Max) (mA) 0.13 IGate source (Typ) (uA) 11000 IGate pulsed (Typ) (A) 2.3 Operating temperature range (C) -40 to 125 Rating Automotive Channel(s) controlled (#) 1 FET External
Vin (Min) (V) 3.2 Vin (Max) (V) 65 Features Enable Iq (Typ) (mA) 0.08 Iq (Max) (mA) 0.13 IGate source (Typ) (uA) 11000 IGate pulsed (Typ) (A) 2.3 Operating temperature range (C) -40 to 125 Rating Automotive Channel(s) controlled (#) 1 FET External
SOT-23-THN (DDF) 8 8 mm² 2.9 x 2.8
  • 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 level C4B
  • 3.2-V to 65-V input range (3.9-V start up)
  • –18-V reverse voltage rating
  • Charge pump for external N-Channel MOSFET
  • Gate discharge timer: meets automotive ISO7637-2 pulse1 transient without additional TVS diode (TVS Less)
  • 3-µA shutdown current (EN=Low)
  • 80-µA typical operating quiescent current (EN=High)
  • 20-V VDS clamp (EN=Low)
  • Integrated battery voltage monitoring switch (SW)
  • 8-pin SOT-23 package 2.90 mm × 1.60 mm
  • 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 level C4B
  • 3.2-V to 65-V input range (3.9-V start up)
  • –18-V reverse voltage rating
  • Charge pump for external N-Channel MOSFET
  • Gate discharge timer: meets automotive ISO7637-2 pulse1 transient without additional TVS diode (TVS Less)
  • 3-µA shutdown current (EN=Low)
  • 80-µA typical operating quiescent current (EN=High)
  • 20-V VDS clamp (EN=Low)
  • Integrated battery voltage monitoring switch (SW)
  • 8-pin SOT-23 package 2.90 mm × 1.60 mm

The LM74501-Q1 operates in conjunction with an external N-channel MOSFET as a low loss reverse polarity protection solution. The device supports wide supply input range of 3.2 V to 65 V. The 3.2-V input voltage support is particularly well suited for severe cold crank requirements in automotive systems. The device can withstand and protect the loads from negative supply voltages down to –18 V. The LM74501-Q1 does not have reverse current blocking and is suitable for input reverse polarity protection of loads that can potentially deliver energy back to the input supply such as automotive body control module motor loads.

The LM74501-Q1 controller provides a charge pump gate drive for an external N-channel MOSFET. LM74501-Q1 has a unique integrated feature which allows systems to meet automotive ISO7637 pulse 1 transient requirements without additional TVS Diode (TVS Less). LM74501-Q1 features integrated switch to enable battery voltage monitoring with an external resistor divider. With the enable pin low, the controller is off and draws only around 1 µA of current thus offering low system current when put into sleep mode.

The LM74501-Q1 operates in conjunction with an external N-channel MOSFET as a low loss reverse polarity protection solution. The device supports wide supply input range of 3.2 V to 65 V. The 3.2-V input voltage support is particularly well suited for severe cold crank requirements in automotive systems. The device can withstand and protect the loads from negative supply voltages down to –18 V. The LM74501-Q1 does not have reverse current blocking and is suitable for input reverse polarity protection of loads that can potentially deliver energy back to the input supply such as automotive body control module motor loads.

The LM74501-Q1 controller provides a charge pump gate drive for an external N-channel MOSFET. LM74501-Q1 has a unique integrated feature which allows systems to meet automotive ISO7637 pulse 1 transient requirements without additional TVS Diode (TVS Less). LM74501-Q1 features integrated switch to enable battery voltage monitoring with an external resistor divider. With the enable pin low, the controller is off and draws only around 1 µA of current thus offering low system current when put into sleep mode.

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* Data sheet LM74501-Q1 "TVS Less" Reverse Battery Protection Controller datasheet 06 Jul 2021
User guide LM74501-Q1EVM User's Guide (Rev. A) 08 Sep 2021

Design & development

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Evaluation board

LM74501Q1EVM — LM74501-Q1 evaluation module for reverse polarity protection controller with integrated VDS clamp

The LM74501-Q1 evaluation module (LM74501Q1EVM) helps designers evaluate the operation and performance of the LM74501-Q1 reverse polarity protection controller. This evaluation module demonstrates how an N-channel power MOSFET can be used to realize input reverse voltage protection with low IQ (...)

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LM74501-Q1 PSpice Transient Model

SNOM716.ZIP (100 KB) - PSpice Model
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PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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SOT-23-THIN (DDF) 8 View options

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