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RT8409GS Datasheet(PDF) 10 Page - Richtek Technology Corporation

Part # RT8409GS
Description  Green Mode Buck Converter
Download  11 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT8409GS Datasheet(HTML) 10 Page - Richtek Technology Corporation

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RT8409
10
DS8409-00
September 2016
www.richtek.com
©
Copyright
2016 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
Figure 1. Derating Curve of Maximum Power Dissipation
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0
25
50
75
100
125
Ambient Temperature (°C)
Two-Layer PCB
Layout Consideration
For best performance of the RT8409, the following layout
guidelines should be strictly followed.
The hold up capacitor, C1, must be placed as close as
possible to the VCC pin.
The compensation component C2 and R1, must be
placed as close as possible to the COMP pin.
The IC SOURCE pin are high frequency switching nodes.
The traces must be as wide and short as possible.
Keep the main traces with switching current as short
and wide as possible.
Place CIN, L1, R2, COUT, and D5 as close to each other
as possible.
Figure 2. PCB Layout Guide
Place the capacitor C1 as close as
possible to the VCC pin
VMAIN
CIN
Power GND
L1
VOUT
R2
C1
COUT
Analog GND
D5
R3
RSTART
Place the compensation
Components C2 and R1 as
close as possible to the IC
Analog GND
C2
VCC
Narrow trace from main circuit
to the IC to avoid the switching
noise
Place the Diode D5 and the resistor R2 as
close as possible to the SOURCE pin
R2B
R2A
Power GND
R1
C3
D7
D8
R4


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