LTC4372/LTC4373
Low Quiescent Current Ideal Diode Controller
FEATURES
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 cur-
rent delivery or current transfer from one path to the other
even at light loads.
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Reduces Power Dissipation by Replacing a Power
Schottky Diode
Low Quiescent Current: 5µA Operating, 0.5µA
Shutdown
Wide Operating Voltage Range: 2.5V to 80V
Reverse Supply Protection to –28V
High Side External N-Channel MOSFET Drive
Drives Back-to-Back MOSFETs for Inrush Control and
Load Switching
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A 5µA operating current achieves high efficiency for inter-
mittent load applications or always-on backup power sup-
plies. 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.
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Fast Reverse Current Turn-Off within 1.5µs
8-Lead MSOP and 3mm × 3mm DFN Packages
APPLICATIONS
The LTC4372 shutdown function reduces the quiescent
current to 0.5µA. The LTC4373 has a UV pin for undervolt-
age monitoring while the UVOUT pin provides hysteresis
adjustment and status information. During undervoltage,
the back-to-back MOSFETs are cut off and quiescent cur-
rent reduces to 0.5μA.
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Automotive Battery Protection
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Redundant Power Supplies
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Portable Instrumentation
Solar Powered Systems
Energy Harvesting Applications
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All registered trademarks and trademarks are the property of their respective owners.
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Supply Holdup
TYPICAL APPLICATION
12V, 20A Reverse Battery Protection
Power Dissipation vs Load Current
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