LT3464 データシートの表示（PDF） - Linear Technology

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LT3464

High Voltage Step-Up/Step-Down DC/DC Converter

Linear Technology 

LT3464

APPLICATIO S I FOR ATIO

Board Layout Considerations

As with all switching regulators, careful attention must be

paid to the PCB board layout and component placement.

To maximize efficiency, switch rise and fall times are made

as short as possible. To prevent electromagnetic interfer-

ence (EMI) problems, proper layout of the high frequency

switching path is essential. The voltage signal of the SW

pin has sharp rising and falling edges. Minimize the length

and area of all traces connected to the SW pin and always

use a ground plane under the switching regulator to

minimize interplane coupling. In addition, the ground

connection for the feedback resistor R1 should be tied

directly to the GND pin and not shared with any other

component, ensuring a clean, noise-free connection. Rec-

ommended component placement is shown in Figure 6.

GND

VIN

GND

VOUT

3464 F07

VIAS TO GROUND PLANE

VIA TO CONTROL

VIA TO SHDN

Figure 6. Recommended Layout

3464f

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