ame5253 AME, Inc., ame5253 Datasheet - Page 10

• Manufacturer Part Number: ame5253
• Description: 1a, 1.5mhz Synchronous Step-down Converter
• Manufacturer: AME, Inc.

PC Board Layout Checklist
AME5253. These items are also illustrated graphically in Figures 10 and Figures 11 . Check the following in your layout:
10
AME5253
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
4.7 F
2.5V to 5.5V
CER
C
the (+) plate of C
power MOSFETs.
IN
V
IN
C
Figure 10: AME5253 Adjustable Voltage
IN
Figure 8: 1.6V Step-Down Regulator
V
IN
+
-
AME
FB
IN
EN
Regulator Layout Diagram
pin connect directly to the feedback resistors? The resistive divider R2/R1 must be connected between
IN
EN
AME5253
AME5253
GND
OUT
GND
and ground.
SW
FB
SW
FB
IN
and C
2.2 H
90K
R1
OUT
22pF
150K
C
R2
FWD
L1
as close as possible.
IN
as closely as possible? This capacitor provides the AC current to the internal
V
1.6V
OUT
V
10 F
C
CER
+
-
OUT
C
OUT
OUT
FB
node.
3.6 V to 5.0V
4.7 F
CER
C
IN
V
C
IN
Figure 9: 3.3V Step-Down Regulator
IN
Figure 11: AME5253 Fixed Voltage
V
IN
1A, 1.5MHz Synchronous
IN
Regulator Layout Diagram
trace should be kept short, direct and wide.
+
-
IN
EN
IN
EN
AME5253
Step-Down Converter
AME5253
GND
GND
SW
V
FB
SW
OUT
2.2 H
33.3K
150K
L1
22pF
V
V
3.3V
OUT
OUT
+
-
C
10 F
C
OUT
CER
Rev. A.02
OUT