Top

Product details

Parameters

Vin (Min) (V) 3.2 Vin (Max) (V) 65 Features Linear control 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 VSense reverse (Typ) (mV) -11 Rating Automotive Channel(s) controlled (#) 1 FET External open-in-new Find other Ideal diode/ORing controllers

Package | Pins | Size

SOT-23 (DBV) 6 5 mm² 2.9 x 1.6 SOT-23-THN (DDF) 8 8 mm² 2.9 x 2.8 open-in-new Find other Ideal diode/ORing controllers

Features

  • 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
  • Functional Safety-Capable
  • 3.2-V to 65-V input range (3.9-V start up)
  • –65-V reverse voltage rating
  • Charge pump for external N-Channel MOSFET
  • 20-mV ANODE to CATHODE forward voltage drop regulation
  • Enable pin feature
  • 1-µA shutdown current (EN=Low)
  • 80-µA operating quiescent current (EN=High)
  • 2.3-A peak gate turnoff current
  • Fast response to reverse current blocking: < 0.75 µs
  • Meets automotive ISO7637 transient requirements with a suitable TVS Diode
  • Available in 6-pin and 8-pin SOT-23 Package 2.90 mm × 1.60 mm

All trademarks are the property of their respective owners.

open-in-new Find other Ideal diode/ORing controllers

Description

The LM74700-Q1 is an automotive AEC Q100 qualified ideal diode controller which operates in conjunction with an external N-channel MOSFET as an ideal diode rectifier for low loss reverse polarity protection with a 20-mV forward voltage drop. The wide supply input range of 3.2 V to 65 V allows control of many popular DC bus voltages such as 12-V, 24-V and 48-V automotive battery systems. 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 –65 V.

The device controls the GATE of the MOSFET to regulate the forward voltage drop at 20 mV. The regulation scheme enables graceful turn off of the MOSFET during a reverse current event and ensures zero DC reverse current flow. Fast response (< 0.75 µs) to Reverse Current Blocking makes the device suitable for systems with output voltage holdup requirements during ISO7637 pulse testing as well as power fail and input micro-short conditions.

The LM74700-Q1 controller provides a charge pump gate drive for an external N-channel MOSFET. The high voltage rating of LM74700-Q1 helps to simplify the system designs for automotive ISO7637 protection. With the enable pin low, the controller is off and draws approximately 1 µA of current.

open-in-new Find other Ideal diode/ORing controllers
Download
Similar products you might be interested in
open-in-new Compare products
Same functionality and pinout but is not an equivalent to the compared device:
NEW LM74500-Q1 ACTIVE Reverse polarity protection controller 3.2-V to 65-V, 80-µA IQ automotive reverse polarity protection controller
Similar but not functionally equivalent to the compared device:
NEW LM7480-Q1 ACTIVE 3-V to 65-V, automotive ideal diode controller driving back to back NFETs 3-V to 65-V, automotive ideal diode controller driving back to back NFETs supporting reverse polarity, reverse current and over-voltage protection

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 12
Type Title Date
* Datasheet LM74700-Q1 Low IQ Reverse Battery Protection Ideal Diode Controller datasheet (Rev. G) Dec. 21, 2020
Application note Basics of Ideal Diodes (Rev. A) Feb. 17, 2021
Application note Multibattery management in medical ultrasound systems (Rev. A) Jan. 21, 2021
User guide LM74700DDFEVM: Evaluation Module for LM74700-Q1 Dec. 10, 2020
Technical articles Meet airline restrictions with power-path control for dual batteries Jul. 21, 2020
White paper Streamlining Functional Safety Certification in Automotive and Industrial Jun. 09, 2020
White paper 簡化汽車及工業領域的功 能安全認證 Jun. 09, 2020
White paper 자동차 및 산업 분야의 기능적 안전성 인증 간소화 Jun. 09, 2020
Functional safety information LM74700-Q1 Functional Safety FIT Rate and Failure Mode Distribution Dec. 16, 2019
E-book 11 Ways to Protect Your Power Path white paper Jul. 03, 2019
Application note Basics of Power Switches (Rev. A) Apr. 26, 2019
User guide LM74700 Evaluation Module (Rev. A) Feb. 11, 2019

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
document-generic User guide
49
Description

The LM74700DDFEVM helps designers evaluate the operation and performance of the LM74700-Q1 3.2-V to 65-V, 80-μA IQ automotive ideal diode controller (DDF package). This evaluation module demonstrates how an N-channel power MOSFET can emulate a very-low forward voltage diode with low IQ and (...)

Features
  • Reverse battery protection
  • Very low shutdown current
  • Meets automotive ISO 7637-2 standard
  • Fast response to reverse current blocking
EVALUATION BOARD Download
document-generic User guide
49
Description
The LM74700EVM helps designers evaluate the operation and performance of the LM74700-Q1 smart diode controller. This evaluation module demonstrates how an N-channel power MOSFET can emulate a very-low forward voltage diode with low IQ and low-leakage current flowing through the IC.
Features
  • Reverse battery protection
  • Very low shutdown current
  • Meets sutomotive ISO 7637-2 standard
  • Fast response to reverse current blocking

Design tools & simulation

SIMULATION MODEL Download
SNOM667.ZIP (64 KB) - PSpice Model
SIMULATION MODEL Download
SNOM691.TSC (149 KB) - TINA-TI Spice Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

Many TI reference designs include the LM74700-Q1 Use our reference design selection tool to review and identify designs that best match your application and parameters.

CAD/CAE symbols

Package Pins Download
SOT-23 (DBV) 6 View options
SOT-23-THIN (DDF) 8 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos