LTC4451AV#TRMPBF

LTC4451 is a high-performance schottky diode replacement using an integrated N-channel power MOSFET. It easily ORs power supplies together to increase system reliability and prevent reverse conduction. It regulates the forward voltage at 15mV to minimize power loss compared to schottky diodes. Regulation ensures smooth current transfer without oscillation in diode-OR applications. When the power MOSFET is fully enhanced, the RDS(ON) of the transistor is 21Mohm and rated for forward conduction up to 7A while dissipating 1.34W. A high performance gate driver with fast transient response minimizes both forward power dissipation and reverse current. The VCC input allows VIN to work down to ground for low voltage applications. It is used in applications such as schottky diode replacement, industrial, medical and consumer portable devices, battery and wall adapter diode ORing etc.

• Fast turn-on minimizes voltage droop
• Fast reverse recovery time minimizes reverse transient current
• Operating supply range is 2.75V to 5.5V
• VCC current is 20µA typical at (VIN = 2.75V, VCC = 5.5V, TA = 25°C)
• Shutdown current is 0.8µA typical at (SHDN# = 0V, IOUT = 10µA, TA = 25°C)
• Fast turn-on time is 0.3µs typical at (IOUT steps 50mA to 6A, TA = 25°C)
• Operating junction temperature is -40°C to 125°C
• Package style is 16-lead plastic LQFN

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