ADP2302-EVALZ Analog Devices Inc, ADP2302-EVALZ Datasheet - Page 22

• Manufacturer Part Number: ADP2302-EVALZ
• Description: Nonsynchronous Step-Down Regulator Eval. Board
• Manufacturer: Analog Devices Inc

Specifications of ADP2302-EVALZ

• Silicon Manufacturer: Analog Devices
• Application Sub Type: Step Down DC/DC Converter
• Kit Application Type: Power Management - Voltage Regulator
• Silicon Core Number: ADP2302
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

CIRCUIT BOARD LAYOUT RECOMMENDATIONS
Good circuit board layout is essential to obtaining the best
performance for ADP2302/ADP2303. Poor layout can affect the
regulation and stability, as well as the electromagnetic interface
(EMI) and electromagnetic compatibility (EMC) performance.
A PCB layout example is shown in Figure 53. Refer to the
following guidelines for a good PCB layout:




ADP2302/ADP2303
Place the input capacitor, the inductor, catch diode, output
capacitor, and bootstrap capacitor close to the IC using
short traces.
Ensure that the high current loop traces are as short and
wide as possible. The high current path is shown Figure 52.
Maximize the size of ground metal on the component side
to improve thermal dissipation.
Use a ground plane with several vias connecting to the
component side ground to further reduce noise on
sensitive circuit nodes.
GND
V
V
IN
OUT
Figure 53. Recommended Layout for ADP2302/ADP2303
INPUT
CAPACITOR
PGOOD
BST 1
VIN
EN
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OUTPUT
CAPACITORS
2
3
4
EXPOSED
PAD

INDUCTOR
Figure 52. Typical Application Circuit with High Current Lines Shown in Blue
BST CAP
DIODE
Minimize the length of the FB trace connecting the top of
the feedback resistive voltage divider to the output. In
addition, keep these traces away from the high current
traces and the switch node to avoid noise pickup.
8
7
6
5
SW
GND
NC
FB
VIN
PGOOD
EN
ADP2302/
ADP2303
GND
BST
SW
FB