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A7330 Datasheet(PDF) 12 Page - AIT Components Ltd.

Part No. A7330
Description  DC-DC CONVERTER BUCK SENSORLESS CC/CV
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Maker  AITCOMPONENTS [AIT Components Ltd.]
Homepage  http://aitcomponents.com
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 12 page
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AiT Semiconductor Inc.
www.ait-ic.com
A7330
DC-DC CONVERTER BUCK (STEP-DOWN)
SENSORLESS CC/CV
REV1.0
- JAN 2016 RELEASED -
- 12 -
Delta Output Voltage vs. Output Current
In the case of high RFB1 used, the frequency compensation needs to be adjusted correspondingly. As show in
Figure 2, adding a capacitor in paralleled with RFB1 or increasing the compensation capacitance at COMP pin
helps the system stability.
PC Board Layout Guidance
When laying out the printed circuit board, the following checklist should be used to ensure proper operation of
the IC.
1
) Arrange the power components to reduce the AC loop size consisting of CIN, IN pin, SW pin and the
schottky diode.
2
) Place input decoupling ceramic capacitor CIN as close to IN pin as possible. CIN is connected power GND
with vias or short and wide path.
3
) Return FB, COMP and ISET to signal GND pin, and connect the signal GND to power GND at a single
point for best noise immunity. Connect exposed pad to power ground copper area with copper and vias.
4
) Use copper plane for power GND for best heat dissipation and noise immunity.
5
) Place feedback resistor close to FB pin.
6
) Use short trace connecting HSB-CHSB-SW loop.




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