LTH2 Marking, LT3465 datasheet(17/24 Pages) LINER

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LT3498

3498f

APPLICATIONS INFORMATION— LED AND OLED DRIVER

Board Layout Considerations

As with all switching regulators, careful attention must be

paid to the PCB board layout and component placement.

To prevent electromagnetic interference (EMI) problems,

proper layout of high frequency switching paths is essential.

Minimize the length and area of all traces connected to

the switching node pins (SW1 and SW2). Keep the sense

voltage pins (CAP1 and LED1) away from the switching

node. The FB2 connection for the feedback resistor RFB2

should be tied directly from the VOUT2 pin to the FB2

pin and be kept as short as possible, ensuring a clean,

noise-free connection. Place COUT1 and COUT2 next to the

CAP1 and CAP2 pins respectively. Always use a ground

plane ender the switching regulator to minimize interplane

coupling. Recommended component placement is shown

in Figure 13.

Figure 13. Recommended Board Layout

3498 F13

FB2

VOUT2

RFB2

RSENSE1

VIN

CIN

CAP1

SW1

SW2

CAP2

CTRL1

LED1

GND

CTRL2

GND

VIAS TO GROUND PLANE REQUIRED TO

IMPROVE THERMAL PERFORMANCE

VIAS TO VOUT2

LTH2 Marking, LT3465 Datasheet(PDF) 17 Page - Linear Technology