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LM74501-Q1

ACTIVE

Automotive 3.2-V to 65-V reverse polarity protection controller with integrated VDS clamp

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Data sheet

LM74501-Q1

ACTIVE
Data sheet Order now

Product details

Vin (min) (V) 3.2 Vin (max) (V) 65 Number of channels 1 Features Automotive load dump compatibility, Enable, Integrated VDS clamp, Reverse polarity protection Iq (typ) (mA) 0.08 Iq (max) (mA) 0.13 TI functional safety category Functional Safety-Capable FET External single FET IGate source (typ) (µA) 11000 IGate pulsed (typ) (A) 2.3 Operating temperature range (°C) -40 to 125 Rating Automotive Imax (A) 250 Shutdown current (ISD) (mA) (A) 0.001 Device type Reverse polarity protector Product type Reverse polarity protector
Vin (min) (V) 3.2 Vin (max) (V) 65 Number of channels 1 Features Automotive load dump compatibility, Enable, Integrated VDS clamp, Reverse polarity protection Iq (typ) (mA) 0.08 Iq (max) (mA) 0.13 TI functional safety category Functional Safety-Capable FET External single FET IGate source (typ) (µA) 11000 IGate pulsed (typ) (A) 2.3 Operating temperature range (°C) -40 to 125 Rating Automotive Imax (A) 250 Shutdown current (ISD) (mA) (A) 0.001 Device type Reverse polarity protector Product type Reverse polarity protector
SOT-23-THN (DDF) 8 8.12 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 pulse 1 transient without additional TVS diode (TVS less)
  • 1-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 pulse 1 transient without additional TVS diode (TVS less)
  • 1-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 functionality 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. The LM74501-Q1 has a unique integrated feature that allows systems to meet automotive ISO7637 pulse 1 transient requirements without an additional TVS Diode (TVS less). The LM74501-Q1 features an 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 functionality 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. The LM74501-Q1 has a unique integrated feature that allows systems to meet automotive ISO7637 pulse 1 transient requirements without an additional TVS Diode (TVS less). The LM74501-Q1 features an 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 Automotive Reverse Battery Protection Controller datasheet (Rev. A) PDF | HTML 07 Feb 2022
User guide LM74501-Q1EVM User's Guide (Rev. A) PDF | HTML 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 (...)

User guide: PDF | HTML
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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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