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LTC4372

Part Number	LTC4372
Manufacturer	Analog Devices
Description	Low Quiescent Current Ideal Diode Controller
Published	Mar 6, 2021
Detailed Description	LTC4372/LTC4373 Low Quiescent Current Ideal Diode Controller FEATURES n Reduces Power Dissipation by Replacing a Power ...
Datasheet	LTC4372 PDF File

Overview

LTC4372/LTC4373 Low Quiescent Current Ideal Diode Controller FEATURES n Reduces Power Dissipation by Replacing a Power Schottky Diode n Low Quiescent Current: 5µA Operating n Wide Operating Voltage Range: 2.
5V to 80V n Reverse Supply Protection to –28V n No TVS Input Clamps Required n High Side External N-Channel MOSFET Drive n Drives Back-to-Back MOSFETs for Inrush Control and Load Switching n Shutdown Input for ON/OFF Control n Fast Reverse Current Turn-Off within 1.
5µs n 8-Lead MSOP and 3mm × 3mm DFN Packages APPLICATIONS n Automotive Battery Protection n Redundant Power Supplies n Portable Instrumentation n Solar Powered Systems n Energy Harvesting Applications n Supply Holdup DESCRIPTION The LTC®4372/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 turnoff 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.
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TYPICAL APPLICATION 12V, 20A Reverse Battery Protection VIN = 12V BSC026N08NS5 VOUT 12V 20A IN SOURCE GATE 2UPU LTC4372 GND SHDN OUT INTVCC 43723 TA01a 100nF 10μF POWER DISSIPATION (W) Power Dissipation vs Load Current 10 8 SCHOTTKY DIODE (SBG2040CT) 6 4 POWER SAVED 2...

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