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LTC4372/73: Low Quiescent Current Ideal Diode Controllers

The LTC4372/73 feature low operating current (5uA) and shutdown current (0.5uA) to increase efficiency in applications where the ideal diode is used for intermittent loads or always-on standby channels, such as in battery powered applications in portable instrumentation, automotive and renewable energy fields.

The LTC4372/73 differ in a secondary technical function:
●  LTC4372: The LTC4372 shutdown function reduces the quiescent current to 0.5µA (lead part)
●  LTC4373: The LTC4373 has a UV pin for undervoltage monitoring while the UVOUT pin provides hysteresis adjustment and status information.

Low quiescent current Ideal Diode Controllers for battery powered applications
●  Reduce power dissipation using an external n-channel MOSFET instead of a diode
●  Low quiescent current minimizes power consumption and conserves energy
●  Wide operating voltage range: 2.5V to 80V

Key Features and Benefits

●  Reduces Power Dissipation by Replacing a Power Schottky Diode with an external N-Channel MOSFET
●  Low Quiescent Current: 5µA Operating, 0.5µA Shutdown minimizes power loss and conserves energy, which is especially important in battery powered automotive and portable applications
●  Wide Operating Voltage Range: 2.5V to 80V supports positive high voltage rails or the return path of -48V rails. Operates through automotive cold crank applications.

Applications

●  Automotive: cold crank, battery, blocking diode, ideal diode
●  Consumer: portable applications, prosumer
●  Instrumentation: industrial battery powered applications
●  Aerospace and Defense: ADEF battery powered applications

Evaluation Board

The LTC4372/73 can be evaluated with the DC2969A-A and DC2969A-B.

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