LTC4358_15 Datasheet, PDF (1/12 Pages) Linear Technology – 5A Ideal Diode

FEATURES
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
APPLICATIONS
n _{N+1 Redundant Power Supplies}
n _{High Availability Systems}
n _{Telecom Infrastructure}
n _{Automotive Systems}
LTC4358
5A Ideal Diode
DESCRIPTION
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.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
12V, 5A Diode-OR
V_INA = 12V
IN
DRAIN
OUT
LTC4358
V_DD
GND
V_INB = 12V
IN
DRAIN
LTC4358
GND
OUT
V_DD
4358 TA01
V_OUT TO
5A LOAD
Power Dissipation vs Load Current
3.0
2.5
DIODE (B530C)
2.0
1.5
POWER SAVED
1.0
0.5
0
0
FET (LTC4358)
2
4
6
8
CURRENT (A)
4358 TA01b
4358fa
1