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AME5258-AEV180 Datasheet(PDF) 11 Page - AMETHERM Circuit Protection Thermistors

No. de pieza AME5258-AEV180
Descripción Electrónicos  1.5MHz, 600mA Synchronous Buck Converter
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Fabricante Electrónico  AMETHERM [AMETHERM Circuit Protection Thermistors]
Página de inicio  http://www.ametherm.com
Logo AMETHERM - AMETHERM Circuit Protection Thermistors

AME5258-AEV180 Datasheet(HTML) 11 Page - AMETHERM Circuit Protection Thermistors

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AME
11
AME5258
1.5MHz, 600mA
Synchronous Buck Converter
Rev.A.05
Figure 9: 3.3V Step-Down Regulator
PC Board Layout Checklist
When laying out the printed circuit board, the following checklist should be used to ensure proper operation of the
AME5258. These items are also illustrated graphically in Figures 10 and Figures 11 . Check the following in your layout:
1. The power traces, consisting of the GND trace, the SW trace and the V
IN trace should be kept short, direct and wide.
2. Does the V
FB pin connect directly to the feedback resistors? The resistive divider R1/R2 must be connected between
the (+) plate of C
OUT and ground.
3. Does the (+) plate of CIN connect to V
IN as closely as possible? This capacitor provides the AC current to the internal
power MOSFETs.
4. Keep the switching node, SW, away from the sensitive V
FB node.
5. Keep the (-) plates of C
IN and COUT as close as possible.
Figure 10: AME5258 Adjustable Voltage
Regulator Layout Diagram
Figure 11: AME5258 Fixed Voltage
Regulator Layout Diagram
Figure 8: 3V Step-Down Regulator
SW
FB
GND
IN
EN
R2
R1
VOUT
AME5258
L1
COUT
CIN
CFWD
+
+
-
-
VIN
SW
GND
IN
EN
VOUT
L1
COUT
+
+
-
-
AME5258
VOUT
CIN
VIN
SW
FB
GND
IN
EN
960K
240K
VOUT
AME5258
VIN
COUT
10
µF
CER
COUT
CER
3V
3.3V to 5.5V
22pF
2.2
µH
4.7
µF
SW
FB
GND
IN
EN
887K
196K
VOUT
AME5258
COUT
10
µF
CER
COUT
CER
3.3V
3.6V to 5.5V
22pF
VIN
2.2
µH
4.7
µF


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