LTM4614EVPBF datasheet(15/20 Pages) LINER

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LTM4614

4614fa

APPLICATIONS INFORMATION

Figure 11. Recommended PCB Layout

CIN1

GND1

GND2

GND1

VIN1

GND1

GND2

GND1

VOUT2

VOUT1

VIN2

GND2

4614 F11

VOUT1

3456789

10 11 12

CIN2

COUT3 COUT4

COUT1 COUT2

I/O PINS

Safety Considerations

The LTM4614 modules do not provide isolation from VIN to

VOUT. There is no internal fuse. If required, a slow blow fuse

with a rating twice the maximum input current needs to be

provided to protect each unit from catastrophic failure.

Layout Checklist/Example

The high integration of LTM4614 makes the PCB board

layout very simple and easy. However, to optimize its electri-

cal and thermal performance, some layout considerations

are still necessary.

• Use large PCB copper areas for high current path,

including VIN, GND and VOUT. It helps to minimize the

PCB conduction loss and thermal stress.

• Place high frequency ceramic input and output capaci-

tors next to the VIN, GND and VOUT pins to minimize

high frequency noise.

• Place a dedicated power ground layer underneath the

unit.

• To minimize the via conduction loss and reduce module

thermal stress, use multiple vias for interconnection

between the top layer and other power layers.

• Do not put via directly on pads unless the via is

capped.

Figure 11 gives a good example of the recommended

layout.

LTM4614EVPBF Datasheet(PDF) 15 Page - Linear Technology

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