ame5258a AME, Inc., ame5258a Datasheet - Page 11

• Manufacturer Part Number: ame5258a
• Description: Synchronous Buck Converter
• Manufacturer: AME, Inc.

PC Board Layout Checklist
AME5258A. These items are also illustrated graphically in Figures 9. Check the following in your layout:
AME5258A
Rev.A.01
3.3V to 5.5V
When laying out the printed circuit board, the following checklist should be used to ensure proper operation of the
1. The power traces, consisting of the GND trace, the SW trace and the V
2. Does the V
3. Does the (+) plate of CIN connect to V
4. Keep the switching node, SW, away from the sensitive V
5. Keep the (-) plates of C
4.7µF
CER
C
the (+) plate of C
power MOSFETs.
OUT
V
IN
Figure 7: 3V Step-Down Regulator
AME
EN
IN
FB
pin connect directly to the feedback resistors? The resistive divider R1/R2 must be connected between
AME5258A
GND
OUT
and ground.
IN
SW
FB
and C
OUT
C
240K
IN
V
2.2µH
Figure 9: AME5258A Adjustable Voltage
as close as possible.
960K
22pF
IN
+
-
IN
as closely as possible? This capacitor provides the AC current to the internal
IN
EN
AME5258A
Regulator Layout Diagram
GND
V
3V
OUT
CER
C
10µF
OUT
SW
FB
FB
3.6V to 5.5V
node.
R1
4.7µF
C
CER
Synchronous Buck Converter
C
FWD
OUT
L1
R2
V
IN
Figure 8: 3.3V Step-Down Regulator
IN
trace should be kept short, direct and wide.
V
+
-
IN
EN
OUT
C
OUT
AME5258A
GND
SW
1.5MHz, 800mA
FB
196K
2.2µH
887K
22pF
V
3.3V
OUT
CER
C
10µF
OUT
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