SC250 datasheet(10/18 Pages) SEMTECH

tên linh kiện	SC250

Giải thích chi tiết về linh kiện	Step-Down DC-DC Converter with Bias LDO for RF Power Amplifi ers

PDF	18 Pages

Scroll/Zoom	100%

nhà sản xuất	SEMTECH [Semtech Corporation]

Trang chủ	http://www.semtech.com

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SC250

PRELIMINARY

POWER MANAGEMENT

Applications Information (Cont.)

PCB Layout Considerations

Poor layout can degrade the performance of the DC-

DC converter and can be a contributory factor in EMI

problems, ground bounce and resistive voltage losses.

Poor regulation and instability can result.

A few simple design rules can be implemented to ensure

good layout:

Place the inductor and ﬁlter capacitors as close to the

device as possible and use short wide traces between

the power components.

Route the output voltage feedback and V

DAC path away

from inductor and LX node to minimize noise and

magnetic interference.

Maximize ground metal on component side to improve

the return connection and thermal dissipation.

Separation between the LX node and GND should be

maintained to avoid coupling of switching noise to the

ground plane.

To further reduce noise interference on sensitive

circuit nodes, use a ground plane with several vias

connecting to the component side ground.

LOUT

COUT

SC250

VOUT

VREF

GND

CREF

VIN

CIN

VDAC

PGND

SC250 bảng dữ liệu(PDF) 10 Page - Semtech Corporation