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LM74910-Q1

ACTIVE

Automotive ideal diode with circuit breaker, 200-kHz ACS and under- and overvoltage protection

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Data sheet

LM74910-Q1

ACTIVE
Data sheet Order now

Product details

Vin (max) (V) 65 Vin (min) (V) 3 FET External back-to-back FET Device type Ideal diode controller Number of channels 1 Rating Automotive Features Adjustable current limit, Analog current monitor, Overvoltage protection, Reverse current blocking, Reverse polarity protection, Short circuit protection Iq (typ) (mA) 0.63 TI functional safety category Functional Safety-Capable IGate source (typ) (µA) 18500 IGate sink (typ) (mA) 2670 Operating temperature range (°C) -40 to 125 Shutdown current (ISD) (mA) (A) 0.00287 Product type Ideal diode controller
Vin (max) (V) 65 Vin (min) (V) 3 FET External back-to-back FET Device type Ideal diode controller Number of channels 1 Rating Automotive Features Adjustable current limit, Analog current monitor, Overvoltage protection, Reverse current blocking, Reverse polarity protection, Short circuit protection Iq (typ) (mA) 0.63 TI functional safety category Functional Safety-Capable IGate source (typ) (µA) 18500 IGate sink (typ) (mA) 2670 Operating temperature range (°C) -40 to 125 Shutdown current (ISD) (mA) (A) 0.00287 Product type Ideal diode controller
VQFN (RGE) 24 16 mm² 4 x 4
  • AEC-Q100 qualified for automotive applications
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature range
  • Functional Safety-Capable
  • 3V to 65V input range
  • 74V Absolute Maximum Rating for LM74910H-Q1
  • Reverse input protection down to –65V
  • Drives external back-to-back N-Channel MOSFETs in common drain configuration
  • Ideal diode operation with 10.5mV A to C forward voltage drop regulation
  • Low reverse detection threshold (–10.5mV) with fast turn off response (0.5µs)
  • 20mA peak gate (DGATE) turn on current
  • 2.6A peak DGATE turnoff current
  • Adjustable overcurrent and short circuit protection
  • Analog current monitor output with 2% accuracy for LM74910H-Q1
  • Adjustable overvoltage and undervoltage protection
  • SLEEP mode OCP Retry in LM74910H-Q1
  • Low 2.5µA shutdown current (EN=Low)
  • SLEEP mode with 6µA current (EN=High, SLEEP=Low)
  • Meets automotive ISO7637 transient requirements with a suitable TVS diode
  • Available in space saving 24-pin VQFN package
  • AEC-Q100 qualified for automotive applications
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature range
  • Functional Safety-Capable
  • 3V to 65V input range
  • 74V Absolute Maximum Rating for LM74910H-Q1
  • Reverse input protection down to –65V
  • Drives external back-to-back N-Channel MOSFETs in common drain configuration
  • Ideal diode operation with 10.5mV A to C forward voltage drop regulation
  • Low reverse detection threshold (–10.5mV) with fast turn off response (0.5µs)
  • 20mA peak gate (DGATE) turn on current
  • 2.6A peak DGATE turnoff current
  • Adjustable overcurrent and short circuit protection
  • Analog current monitor output with 2% accuracy for LM74910H-Q1
  • Adjustable overvoltage and undervoltage protection
  • SLEEP mode OCP Retry in LM74910H-Q1
  • Low 2.5µA shutdown current (EN=Low)
  • SLEEP mode with 6µA current (EN=High, SLEEP=Low)
  • Meets automotive ISO7637 transient requirements with a suitable TVS diode
  • Available in space saving 24-pin VQFN package

The LM749x0-Q1 ideal diode controller drives and controls external back to back N-Channel MOSFETs to emulate an ideal diode rectifier with power path ON/OFF control with overcurrent and overvoltage protection. The wide input supply of 3V to 65V allows protection and control of 12V and 24V automotive battery powered ECUs. The device can withstand and protect the loads from negative supply voltages down to –65V. An integrated ideal diode controller (DGATE) drives the first MOSFET to replace a Schottky diode for reverse input protection and output voltage holdup. With a second MOSFET in the power path the device allows load disconnect (ON/OFF control) in case of overcurrent and overvoltage events using HGATE control. The device has integrated current sense amplifier which provides accurate current monitoring with adjustable overcurrent and short circuit thresholds. The device features an adjustable overvoltage cut-off protection feature. The device features a SLEEP mode which enables ultra-low quiescent current consumption (6µA) and at the same time providing refresh current to the always ON loads when vehicle is in the parking state. The LM749x0-Q1 has a maximum voltage rating of 65V.

The LM749x0-Q1 ideal diode controller drives and controls external back to back N-Channel MOSFETs to emulate an ideal diode rectifier with power path ON/OFF control with overcurrent and overvoltage protection. The wide input supply of 3V to 65V allows protection and control of 12V and 24V automotive battery powered ECUs. The device can withstand and protect the loads from negative supply voltages down to –65V. An integrated ideal diode controller (DGATE) drives the first MOSFET to replace a Schottky diode for reverse input protection and output voltage holdup. With a second MOSFET in the power path the device allows load disconnect (ON/OFF control) in case of overcurrent and overvoltage events using HGATE control. The device has integrated current sense amplifier which provides accurate current monitoring with adjustable overcurrent and short circuit thresholds. The device features an adjustable overvoltage cut-off protection feature. The device features a SLEEP mode which enables ultra-low quiescent current consumption (6µA) and at the same time providing refresh current to the always ON loads when vehicle is in the parking state. The LM749x0-Q1 has a maximum voltage rating of 65V.
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Technical documentation

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* Data sheet LM749x0-Q1 Automotive Ideal Diode With Circuit Breaker, Undervoltage, and Overvoltage Protection With Fault Output datasheet (Rev. C) PDF | HTML 12 Aug 2025
Test report Power Delivery Reference Design for AMD Versal™ AI Edge Series PDF | HTML 25 Mar 2024
Functional safety information LM749x0-Q1 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 29 Feb 2024
Application note Power Supply Design for AMD Versal™ AI Edge Series PDF | HTML 29 Jan 2024
Application note Addressing Automotive Reverse Battery Protection Topologies with LM749x0-Q1 PDF | HTML 13 Jun 2023

Design & development

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Evaluation board

LM74900Q1EVM — LM74900-Q1 evaluation module for ideal diode controller

The LM74900-Q1 evaluation module evaluates the operation and performance of the LM74900-Q1 ideal diode controller in reverse battery protection applications. This evaluation module demonstrates how LM74900-Q1 controls two back-back N-channel power MOSFETs to emulate an ideal diode rectifier with (...)

User guide: PDF | HTML
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Simulation model

LM74910-Q1 PSpice Transient Model

SNOM778.ZIP (114 KB) - PSpice Model
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Simulation model

LM74910H PSPICE Model

SNOM817.ZIP (116 KB) - PSpice Model
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Calculation tool

LM749X0-CALC — Design calculator for LM74900-Q1 and LM74910-Q1 devices

The design calculator allows user to size the external peripheral components while designing with LM74900-Q1 and LM74910-Q1 Devices
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Supported products & hardware

Products
Ideal diode & ORing controllers
  • LM74900-Q1 — Automotive ideal diode with circuit breaker, under- and overvoltage protection with fault output
  • LM74910-Q1 — Automotive ideal diode with circuit breaker, 200-kHz ACS and under- and overvoltage protection
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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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Reference designs

TIPA-020007 — Power supply proof-of-concept design for AMD® Versal™ AI Edge Series Gen 2

This proof-of-concept power design demonstrates how the required power rails for the 2VE3858 device can be powered by TI regulator integrated circuits (ICs). This design methodology aligns with the AMD® standard for minimizing consolidated power supply rails. See the AMD Power Design Manager (PDM) (...)
Design guide: PDF
Reference designs

PMP23227 — Power delivery reference design for AMD Versal™ Edge AI series

This reference design demonstrates how the required power rails for the VE2302 device can be powered by TI's regulator ICs. AMD’s Minimum Rails power consolidation of supplies. See AMD’s Power Design Manager (PDM) tool, for all available power consolidation options. Use PDM when estimating power (...)
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