參數(shù)資料
型號: MP2371DG-Z
廠商: MONOLITHIC POWER SYSTEMS INC
元件分類: 穩(wěn)壓器
英文描述: SWITCHING REGULATOR, DSO8
封裝: 2 X 2 MM, MO-229VCCD-3, QFN-8
文件頁數(shù): 9/10頁
文件大小: 650K
代理商: MP2371DG-Z
MP2371 – 1.8A, 24V, 700KHz STEP-DOWN CONVERTER
MP2371 Rev. 1.0
www.MonolithicPower.com
8
5/26/2008
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2008 MPS. All Rights Reserved.
Top Layer
Bottom Layer
Figure2―PCB Layout
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
>65%
In these cases, an external BST diode is
recommended from the output of the voltage
regulator to BST pin, as shown in Fig.3
MP2371
SW
BST
C
L
BST
C
5V or 3.3V
OUT
External BST Diode
IN4148
Figure 3—Add Optional External Bootstrap
Diode to Enhance Efficiency
The recommended external BST diode is
IN4148, and the BST cap is 0.1~1F.
Table 2—Suggested Surface Mount Inductors
Manufacturer
Part Number
Inductance(H)
Max DCR()
Current Rating
(A)
Dimensions
L x W x H (mm
3)
Wurth Electronics
7447785004
4.7
0.060
2.5
5.9 x 6.2 x 3.3
Toko
A916CY-4R7M
4.7
0.026
2.5
6.2 x 6.3 x 3.5
Coiltronics
DR73-4R7
4.7
0.03
3
6.0 x 7.6 x 3.5
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