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MP2482DS Datasheet(PDF) 11 Page - Monolithic Power Systems

Part # MP2482DS
Description  5A, 30V, 420kHz Step-Down Converter
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Manufacturer  MPS [Monolithic Power Systems]
Direct Link  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MP2482DS Datasheet(HTML) 11 Page - Monolithic Power Systems

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MP2482 – 5A, 30V, 420kHZ STEP-DOWN CONVERTER
MP2482 Rev.1.4
www.MonolithicPower.com
11
9/21/2011
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
Preliminary Specifications Subject to Change
© 2011 MPS. All Rights Reserved.
PCB Layout Guide (For SOIC8E Package)
PCB layout is very important to achieve stable
operation. Please follow these guidelines and
take Figure3 and 4 for references.
1) Keep the path of switching current short
and minimize the loop area formed by Input
cap, high-side MOSFET and schottky diode.
2) Keep the connection of schottky diode
between SW pin and input power ground
as short and wide as possible.
3) Ensure all feedback connections are short
and direct. Place the feedback resistors
and compensation components as close to
the chip as possible.
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. For single layer
PCB, exposed pad should not be soldered.
GND
VCC
BST
SW
IN
EN
PG
FB
Rb
L1
D1
PGND
SGND
R1
C2
C1
Figure 3—PCB Layout for Single Layer
R4
GND
VCC
BST
SW
IN
EN
PG
FB
C1
Rb
R1
C2
L1
D1
PGND
SGND
Top Layer
SGND
Bottom Layer
Figure 4—PCB Layout for Double Layers


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