SC411 datasheet(18/27 Pages) SEMTECH

부품명	SC411

상세설명	Synchronous Buck Pseudo-Fixed Frequency Power Supply Controller

PDF	27 Pages

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제조업체	SEMTECH [Semtech Corporation]

홈페이지	http://www.semtech.com

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SC411

POWER MANAGEMENT

The layout can be considered in two parts, the control section referenced to VSSA and the power section. Looking at

the control section ﬁrst, locate all components referenced to VSSA on the schematic and place these components at

the chip. Drop vias to the ground plane as needed.

Figure 5: Components Connected to VSSA

Figure 6: Control Section Example

In Figure 6 above, all components referenced to VSSA have been placed and connected to the ground plane with

vias. Decoupling capacitors C9 and C10 are as close as possible to their pins and connected to the ground plane

with vias. Note how the VSSA and PGND pins are connected directly to the thermal pad, which has 4 vias to the

ground plane (not shown).

VOUT

VBAT

1nF

C10

1uF

5VSUS

10R

5VSUS

VOUT

VCCA

PGD

VDDP

ILIM

SC411

56p

0402

0603

1uF

20k0

14k3

SC411 데이터시트(PDF) 18 Page - Semtech Corporation