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MP1583 Datasheet(PDF) 10 Page - Monolithic Power Systems

Part # MP1583
Description  3A, 23V, 385KHz Step-Down Converter
Download  13 Pages
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Manufacturer  MPS [Monolithic Power Systems]
Direct Link  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MP1583 Datasheet(HTML) 10 Page - Monolithic Power Systems

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MP1583 – 3A, 23V, 385KHz STEP-DOWN CONVERTER
MP1583 Rev. 3.1
www.MonolithicPower.com
10
6/20/2011
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
D1
C4
R3
C5
R4
L1
SGND
PGND
C6
C2
C3
C1
Top Layer
Bottom Layer
Figure 3―PCB Layout (Double Layer)
External Bootstrap Diode
An external bootstrap diode may enhance the
efficiency of the regulator, the applicable
conditions of external BST diode are:
VOUT=5V or 3.3V; and
Duty cycle is high: D=
IN
OUT
V
V
>65%
In these cases, an external BST diode is
recommended from the output of the voltage
regulator to BST pin, as shown in Fig.4
MP1583
SW
BST
C
L
BST
C
5V or 3.3V
OUT
External BST Diode
IN4148
+
Figure 4—Add Optional External Bootstrap
Diode to Enhance Efficiency
The recommended external BST diode is
IN4148, and the BST cap is 0.1~1µF.


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