LTC4373 Series

Low Quiescent Current Ideal Diode Controller

Catalog

Low Quiescent Current Ideal Diode Controller

Part	Current - Output (Max) [Max]	FET Type	Delay Time - OFF	Voltage - Supply [Min]	Voltage - Supply [Max]	Mounting Type	Package / Case	Package / Case [custom]	Package / Case	Applications	Ratio - Input:Output [custom]	Supplier Device Package	Type	Current - Supply	Operating Temperature [Min]	Operating Temperature [Max]	Grade
Analog Devices LTC4373HMS8#PBF	10 µA	N-Channel	500 ns	2.5 V	80 V	Surface Mount	8-MSOP 8-TSSOP	0.118 in	3 mm	Redundant Power Supplies	1:1	8-MSOP	N+1 ORing Controller	5 µA	-40 °C	125 °C	Automotive
Analog Devices LTC4373IMS8#TRPBF	10 µA	N-Channel	500 ns	2.5 V	80 V	Surface Mount	8-MSOP 8-TSSOP	0.118 in	3 mm	Redundant Power Supplies	1:1	8-MSOP	N+1 ORing Controller	5 µA	-40 °C	85 °C	Automotive
Analog Devices LTC4373IMS8#PBF	10 µA	N-Channel	500 ns	2.5 V	80 V	Surface Mount	8-MSOP 8-TSSOP	0.118 in	3 mm	Redundant Power Supplies	1:1	8-MSOP	N+1 ORing Controller	5 µA	-40 °C	85 °C	Automotive
Analog Devices LTC4373HMS8#TRPBF	10 µA	N-Channel	500 ns	2.5 V	80 V	Surface Mount	8-MSOP 8-TSSOP	0.118 in	3 mm	Redundant Power Supplies	1:1	8-MSOP	N+1 ORing Controller	5 µA	-40 °C	125 °C	Automotive
Analog Devices LTC4373CMS8#PBF	10 µA	N-Channel	500 ns	2.5 V	80 V	Surface Mount	8-MSOP 8-TSSOP	0.118 in	3 mm	Redundant Power Supplies	1:1	8-MSOP	N+1 ORing Controller	5 µA	0 °C	70 °C	Automotive
Analog Devices LTC4373CDD#TRPBF	10 µA	N-Channel	500 ns	2.5 V	80 V	Surface Mount	8-WFDFN Exposed Pad			Redundant Power Supplies	1:1	8-DFN (3x3)	N+1 ORing Controller	5 µA	0 °C	70 °C	Automotive
Analog Devices LTC4373HDD#TRPBF	10 µA	N-Channel	500 ns	2.5 V	80 V	Surface Mount	8-WFDFN Exposed Pad			Redundant Power Supplies	1:1	8-DFN (3x3)	N+1 ORing Controller	5 µA	-40 °C	125 °C	Automotive

Catalog

Low Quiescent Current Ideal Diode Controller

Key Features

• 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

Description

TheLTC4372/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 theUVOUTpin provides hysteresis adjustment and status information. During undervoltage, the back-to-back MOSFETs are cut off and quiescent current reduces to 0.5μA.APPLICATIONSAutomotive Battery ProtectionRedundant Power SuppliesPortable InstrumentationSolar Powered SystemsEnergy Harvesting ApplicationsSupply Holdup