ACT4524 datasheet(8/16 Pages) ACTIVE-SEMI

Part #	ACT4524

Description	40V/3.5A Buck Converter with Dual Output and Separated Over Current Protection

PDF	16 Pages

Scroll/Zoom	100%

Manufacturer	ACTIVE-SEMI [Active-Semi, Inc]

Direct Link	http://www.active-semi.com

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8 / 16 page

ACT4524

Rev 0, 28-Jul-15

Innovative Power

- 8 -

www.active-semi.com

APPLICATIONS INFORMATION

PCB 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 properly to

reduce the AC loop size which consisting of CIN,

VIN pin, SW pin and the Schottky diode.

2) Place input decoupling ceramic capacitor CIN as

close to VIN pin as possible. CIN is connected to

power GND with either vias or short and wide

path.

3) Return CSP 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 other ground

planes by thermal vias.

4) Use copper plane for power GND for best heat

dissipation and noise immunity.

5) Use short trace connecting HSB-CHSB-SW loop.

6) SW pad is noise node which is switching from

VIN to GND. It should be isolated away from the

rest of circuit for good EMI and low noise

operation.

ACT4524 Datasheet(PDF) 8 Page - Active-Semi, Inc