SGM3140 Datasheet, PDF (11/14 Pages) SG Micro Corp – Charge Pump LED Driver

SGM3140
EVALUATION BOARD LAYOUT
500mA Buck/Boost
Charge Pump LED Driver
Printed Circuit Board Layout Recommendations
Follow the PCB layout guidelines for optimal performance:
1. Place the flying capacitor CF as close to the chip as possible; otherwise 2× mode performance will be compromised.
Also keep analog components away from this capacitor.
2. Place input and output decoupling capacitors as close to the chip as possible to reduce switching noise and output
ripple.
3. The power traces, consisting of the VIN/GND trace, the VOUT trace and the WLED trace should be kept short and
wide. Also minimize the feedback loop area (consisting of WLED/FB) small.
4. Connect the exposed pad to the GND plane to achieve the best power dissipation.
SG Micro Corp
11
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