Overview
Features and Benefits
- Reduces Power Dissipation by Replacing a Power Schottky Diode
- Low Quiescent Current: 5μA Operating
- Wide Operating Voltage Range: 2.5V to 80V
- Reverse Supply Protection to –28V
- No TVS Input Clamps Required
- High Side External N-Channel MOSFET Drive
- Drives Back-to-Back MOSFETs for Inrush Control and Load Switching
- Shutdown Input for ON/OFF Control
- Fast Reverse Current Turn-Off within 1.5μs
- 8-Lead MSOP and 3mm × 3mm DFN Packages
Product Details
The LTC4372/LTC4373 are positive high voltage ideal diode controllers that drive an external N-channel MOSFET to replace a Schottky diode. They control the forward voltage drop across the MOSFET to ensure current delivery or current transfer from one path to the other even at light loads.
A 5μA operating current achieves high efficiency for intermittent load applications or always-on backup power supplies. If a power source fails or is shorted, a fast turn-off minimizes reverse current transients. The LTC4372/LTC4373 control back-to-back N-channel MOSFETs for inrush current control and load switching.
The LTC4372’s SHDN pin keeps the MOSFET off and reduces the quiescent current to 3.5μA. The LTC4373 has a UV pin for undervoltage monitoring while the UVOUT pin provides hysteresis adjustment and status information. During undervoltage, the back-to-back MOSFETs are cut off and quiescent current reduces to 0.5μA.
APPLICATIONS
- Automotive Battery Protection
- Redundant Power Supplies
- Portable Instrumentation
- Solar Powered Systems
- Energy Harvesting Applications
- Supply Holdup
Product Categories
Markets and Technologies
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation & Resources
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Ideal Diodes and Prioritizers6/8/2018
Tools & Simulations
LTspice
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
LTC4373
Design Resources
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PCN-PDN Information
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Support & Discussions
LTC4373 Discussions
Sample & Buy
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Buy Now Pricing
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List Pricing
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Evaluation Boards
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Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.