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Ideal Diode Controller with
Reverse Input Protection
The LT C
4359 is a positive high voltage ideal diode control-
ler that drives an external N-channel MOSFET to replace
a Schottky diode. It controls the for
across the MOSFET to ensure smooth current delivery
without oscillation even at light loads. If a power source
fails or is shorted, a fast turn-off minimizes reverse cur
rent transients. A shutdown mode is available to reduce
the quiescent current to
9μA for load switch and 14µA for
ideal diode applications.
When used in high current diode applications, the LTC4359
reduces power consumption, heat dissipation, voltage loss
and PC board area. With its wide operating voltage range,
the ability to withstand reverse input voltage, and high
temperature rating, the LTC4359 satisfies the demanding
requirements of both automotive and telecom applications.
The LTC4359 also easily ORs power sources in systems
with redundant supplies.
12V, 20A Automotive Reverse-Battery Protection Power Dissipation vs Load Current
Reduces Power Dissipation by Replacing a Power
Wide Operating Voltage Range: 4V to 80V
Reverse Input Protection to – 40V
Low 9µA Shutdown Current
Low 150μA Operating Current
Smooth Switchover without Oscillation
Controls Single or Back-to-Back N-Channel MOSFETs
Available in 6-Pin (2mm × 3mm) DFN, 8-Lead MSOP
and 8-Lead SO Packages
AEC-Q100 Qualified for Automotive Applications
Automotive Battery Protection
Redundant Power Supplies
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IN SOURCE OUT
POWER DISSIPATION (W)
SCHOTTKY DIODE (SBG2040CT)
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