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SC2620 데이터시트(PDF) 22 Page - Semtech Corporation

부품명 SC2620
상세설명  Dual 2A, 30V Step-down Regulator with Programmable Frequency up to 1.4MHz
PDF  26 Pages
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제조업체  SEMTECH [Semtech Corporation]
홈페이지  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC2620 데이터시트(HTML) 22 Page - Semtech Corporation

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 2006 Semtech Corp.
www.semtech.com
SC2620
POWER MANAGEMENT
Suggested PCB Layout for the SC2620.
Figure 15.
C2
L2
D3
L1
C15
D4
D1
D2
C1
C3
R3
R4
C9
R7
C8
C16
C7
C6
R5
C5
C10
R6
R9
R10
R1
R2
C4
R20
GND
GND
AGND
OUT2
OUT1
IN
IN or OUT1
IN
U1
C2
L2
D3
L1
C15
D4
D1
D2
C1
C3
R3
R4
C9
R7
C8
C16
C7
C6
R5
C5
C10
R6
R9
R10
R1
R2
C4
R20
GND
GND
AGND
OUT2
OUT1
IN
IN or OUT1
IN
U1
start capacitors and the VIN filtering capacitor C
16 are to
be tied to the analog ground. The frequency-setting resistor
R
9 is placed next to the ROSC pin and is also connected to
the analog ground. R
20 is a 0Ω resistor that connects the
analog ground to the power ground at a single point.
Applications Information
The exposed pad should be soldered to a large analog
ground plane as the analog ground copper acts as a heat
sink for the device. To ensure proper adhesion to the
ground plane, avoid using vias directly under the device.
In figure 15 two 12mil vias are placed at the edge of the
underside pad.



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