LT8672 - Active Rectifier Controller with Reverse Protection

Features

  • Reverse Input Protection to –40V
  • Improved Performance Compared to a Schottky Diode:
    • Reduce Power Dissipation by >90%
    • Reduce Drop to 20mV
  • Ultrafast Transient Response
    • Rectifies 6VP-P Up to 50kHz
    • Rectifies 2VP-P Up to 100kHz
  • Wide Operating Voltage Range: 3V to 42V
  • Low 20µA Quiescent Current in Operation
  • Low 3.5µA Shutdown Current
  • Accurate 1.21V Enable Pin Threshold
  • Available in Small 10-Lead MSOP

Typical Application

LT8672 Typical Application
LT8672 Typical Application

Description

The LT®8672 is an active rectifier controller for reverse input protection. It drives an external N-channel MOSFET to replace a power Schottky diode. Its very low quiescent current and fast transient response meet the tough requirements in automotive applications where AC input signals of up to 100kHz are present. These signals are rectified with minimum power dissipation on the external FET, simplifying thermal management on the PCB.

With a drop of only 20mV, the LT8672 solution eases the minimum input voltage requirement during cold crank and start-stop, allowing simpler and more efficient circuits. If the input power source fails or is shorted, a fast turn-off minimizes reverse current transients. An available shutdown mode reduces the quiescent current to 3.5μA.

An integrated auxiliary boost regulator provides the required boost voltage to turn the external FET fully on. A power good pin signals when the external FET is ready to take load current.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LT8672EMS#PBF MS-10 MS E 05-08-1661 Yes
LT8672EMS#TRPBF MS-10 MS E 05-08-1661 Yes
LT8672HMS#PBF MS-10 MS H 05-08-1661 Yes
LT8672HMS#TRPBF MS-10 MS H 05-08-1661 Yes
LT8672IMS#PBF MS-10 MS I 05-08-1661 Yes
LT8672IMS#TRPBF MS-10 MS I 05-08-1661 Yes


LT8672 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LT8672EMS#PBF MS-10 E $2.79 $1.95 Yes
LT8672EMS#TRPBF MS-10 E $2.85 $2.01 Yes
LT8672HMS#PBF MS-10 H $3.43 $2.40 Yes
LT8672HMS#TRPBF MS-10 H $3.49 $2.46 Yes
LT8672IMS#PBF MS-10 I $3.07 $2.15 Yes
LT8672IMS#TRPBF MS-10 I $3.13 $2.21 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards

Applications

  • Automotive Battery Protection
  • Industrial Supplies
  • Portable Instrumentation

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Design Tools

LTspice

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Models for the following parts are available in LTspice:
LT8672

Technical Support