MP4462 – 3.5A, 4MHz, 36V STEP-DOWN CONVERTER
PCB LAYOUT GUIDE
2) Bypass ceramic capacitors are suggested
to be put close to the VIN Pin.
PCB layout is very important to achieve stable
operation. It is highly recommended to duplicate
EVB layout for optimum performance.
3) Ensure all feedback connections are short
and direct. Place the feedback resistors
and compensation components as close to
the chip as possible.
If change is necessary, please follow these
guidelines and take Figure 6 for reference.
1) Keep the path of switching current short
and minimize the loop area formed by Input
cap, high-side MOSFET and external
switching diode.
4) Route SW away from sensitive analog
areas such as FB.
5) Connect IN, SW, and especially GND
respectively to a large copper area to cool
the chip to improve thermal performance
and long-term reliability.
C4
L1
BST
V
V
SW
FB
IN
VIN
OUT
D1
R2
C2
C1
R4
R5
EN
EN
MP4462
R1
COMP
FREQ
C3
R3
GND
R6
MP4462 Typical Application Circuit
GND
L1
R1
SW
C4
D1
R6
C2
C1
Vin
GND
GND
Vo
MP4462DQ Top Layer
MP4462DQ Bottom Layer
MP4462 Rev. 1.02
3/4/2013
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17
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