Linear Technology DC1204A - LTC4358 Positive High Voltage Ideal Diode Controller with Integrated FET DC1204A DC1204A Data Sheet

LTC4358

1

4358fa

5A Ideal Diode

The LTC

®

4358 is a 5A ideal diode that uses an internal 

20mΩ N-channel MOSFET to replace a Schottky diode 
when used in diode-OR and high current diode applica-
tions. The LTC4358 reduces power consumption, heat 
dissipation, and PC board area. 

The LTC4358 easily ORs power supplies together to in-
crease total system reliability. In diode-OR applications, 
the LTC4358 regulates the forward voltage drop across 
the internal MOSFET to ensure smooth current transfer 
from one path to the other without oscillation. If the power 
source fails or is shorted, a fast turnoff minimizes reverse 
current transients.

n

  Replaces a Power Schottky Diode

n

  Internal 20mΩ N-Channel MOSFET

n

  0.5μs Turn-Off Time Limits Peak Fault Current

n

  Operating Voltage Range: 9V to 26.5V

n

  Smooth Switchover without Oscillation

n

  No Reverse DC Current

n

  Available in 14-Pin (4mm × 3mm) DFN and

16-Lead TSSOP Packages

n

  N+1 Redundant Power Supplies

n

  High Availability Systems

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 Telecom Infrastructure

n

 Automotive Systems

4358 TA01

LTC4358

GND

IN

DRAIN

V

DD

OUT

V

INA

 = 12V

V

OUT

 TO

5A LOAD

LTC4358

GND

IN

DRAIN

V

DD

OUT

V

INB

 = 12V

CURRENT (A)

0

0

POWER DISSIP

A

TION (W)

0.5

1.0

1.5

2.0

2.5

3.0

2

4

6

8

4358 TA01b

DIODE (B530C)

POWER SAVED

FET (LTC4358)

L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. 
All other trademarks are the property of their respective owners.