LTC4353
Dual Low Voltage
Ideal Diode Controller
Features Description Low Loss Replacement for Power Diodes
n Controls N-Channel MOSFETs
n 0V to 18V Supply ORing or Holdup
n 1Вµs Gate Turn-On and Turn-Off Time
n Enable Inputs
n MOSFET On-Status Outputs
n 16-Lead MSOP and DFN (4mm Г— 3mm) Packages The LTCВ®4353 controls external N-channel MOSFETs to
implement an ideal diode function. It replaces two high
power Schottky diodes and their associated heat sinks,
saving power and board area. The ideal diode function
permits low loss power supply ORing and supply holdup
applications. n The LTC4353 regulates the forward-voltage drop across
the MOSFET to ensure smooth current transfer in diode-OR
applications. A fast turn-on reduces the load voltage
droop during supply switchover. If the input supply fails
or is shorted, a fast turn-off minimizes reverse-current
transients. Applications n n Redundant Power Supplies
Supply Holdup
High Availability Systems and Servers
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