LTC4442_15 datasheet(11/14 Pages) LINER

Part #	LTC4442

Description	High Speed Synchronous N-Channel MOSFET Drivers

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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11 / 14 page

LTC4442/LTC4442-1

11

4442fb

To obtain the optimum performance from the LTC4442:

A. Mount the bypass capacitors as close as possible

between the VLOGIC and GND pins, the VCC and GND

pins, and the BOOST and TS pins. The leads should

be shortened as much as possible to reduce lead

inductance.

B. Use a low inductance, low impedance ground plane

to reduce any ground drop and stray capacitance.

Remember that the LTC4442 switches greater than

5A peak currents and any signiﬁcant ground drop will

degrade signal integrity.

APPLICATIONS INFORMATION

C. Plan the power/ground routing carefully. Know where

the large load switching current is coming from and

going to. Maintain separate ground return paths for

the input pin and the output power stage.

D. Keep the copper traces between the driver output pins

and the load short and wide.

E. Be sure to solder the Exposed Pad on the back side of

the LTC4442 packages to the board. Correctly soldered

to a 2500mm2 double-sided 1oz copper board, the

LTC4442 has a thermal resistance of approximately

40°C/W. Failure to make good thermal contact between

the exposed back side and the copper board will result

in thermal resistances far greater.

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