LTC4450

1

Rev. 0

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TYPICAL APPLICATION

FEATURES

DESCRIPTION

18V, 12A Ideal Diode

The LTC®4450 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.

The LTC4450 regulates the forward voltage at 15mV

to minimize power loss compared to Schottky diodes.

Regulation ensures smooth current transfer without oscil-

lation in diode-OR applications. When the power MOSFET

rated for forward conduction up to 12A while dissipating

1W. A high performance gate driver with fast transient

response minimizes both forward power dissipation and

to ground for low voltage applications. The LTC4450 is

available in a small 16-Lead 2mm × 3mm LQFN Package.

Power Dissipation vs Load Current

APPLICATIONS

n

Reduces Power Dissipation by Replacing a Power

Schottky Diode with No External Components

n

Internal 12A, 7mΩ N-Channel MOSFET

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15mV Regulated Forward Voltage

n

20µA Operating Current, 0.8µA Shutdown

n

n

Fast Turn-ON Minimizes Voltage Droop

n

Fast Reverse Recovery Time Minimizes Reverse

Transient Current

n

Smooth Switchover in Diode-OR Applications

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16-Lead 2mm × 3mm LQFN Package

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Schottky Diode Replacement

n

Industrial, Medical and Consumer Portable Devices

n

Battery and Wall Adapter Diode-ORing

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POWER SAVED

B520 SCHOTTKY

LTC4450

LOAD CURRENT (A)

0

2

4

6

8

10

12

0

1

2

3

4

5

6

7

4450 TA01b

LTC4450

GND

OUT

IN

12V, 12A

SHDN#

12V

4450 TA01a

STATUS

STATUS

OUTPUT

0.1 F