LTC4355IDE-PBF datasheet(10/16 Pages) LINER

Part #	LTC4355IDE-PBF

Description	Positive High Voltage Ideal Diode-OR with Input Supply and Fuse Monitors

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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10 / 16 page

LTC4355

0

4355fa

applicaTions inForMaTion

AdjustR2downby1%to344k

Wtoaccountforitstolerance.

The next lower standard resistor value is R2 = 340k

W.

The LED D1, a Panasonic Green LN1351C, requires at

least 1mA of current to fully turn on. Therefore, R5 is set

to 33k

W to accommodate the lowest input supply voltage

of 36V.

Layout Considerations

The following advice should be considered when laying

out a printed circuit board for the LTC4355.

The inputs to the servo amplifiers, IN1, IN2, and OUT

should be connected as closely as possible to the

MOSFETs’ terminals for good accuracy.

Keep the traces to the MOSFETs wide and short. The PCB

traces associated with the power path through the MOS-

FETs should have low resistance (see Figure 2).

For the DFN package, pin spacing may be a concern at

voltages greater then 30V. Check creepage and clearance

guidelines to determine if this is an issue. Use no-clean

solder to minimize PCB contamination.

Figure 2. Layout Considerations

S

G

D

G

S

LTC4355

FET

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LTC4355IDE-PBF Datasheet(PDF) 10 Page - Linear Technology

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