SC21152 datasheet(15/18 Pages) SEMTECH

tên linh kiện	SC21152

Giải thích chi tiết về linh kiện	Tiny 1.2A Synchronous Buck Regulator with Power Good

PDF	18 Pages

Scroll/Zoom	100%

nhà sản xuất	SEMTECH [Semtech Corporation]

Trang chủ	http://www.semtech.com

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15 / 18 page

SC21152

PCB Layout Guidelines

An optimum layout for the SC21152 is shown below.

When doing the PCB layout the following guidelines

should be used:

The input capacitor must be located as close as possible to

the IC and directly connected to pin 1 (VIN), pin 5 (GND),

and PAD (GND).

The LX trace from pin 6 to the inductor should be as short

as possible, and wide to reduce IR loss and improve heat

dissipation.

PCB Layout - Adjustable VOUT

The output capacitor should be close to the inductor. The

feedback components (Rtop, Ctop, Rbot, for adjustable

VOUT) should be located as close as possible to the FB pin.

For fixed VOUT, the output capacitor connects directly to

the FB pin.

The FB trace should be short and not routed near noise

signals. Do not route the FB trace under the inductor; the

high impedance of the FB circuit can pick up noise from

the inductor’s magnetic field.

CIN

VOUT

VIN

SC21152

GND

VOUT sense trace

CIN

VOUT

VIN

SC21152

Rbot Rtop

Ctop

GND

VOUT sense trace

PCB Layout - Fixed VOUT

SC21152 bảng dữ liệu(PDF) 15 Page - Semtech Corporation