參數(shù)資料
型號: MP8650DN-Z
廠商: MONOLITHIC POWER SYSTEMS INC
元件分類: 穩(wěn)壓器
英文描述: 19 A SWITCHING REGULATOR, 400 kHz SWITCHING FREQ-MAX, QCC20
封裝: 3 X 4 MM, MO-220VGED, QFN-20
文件頁數(shù): 7/8頁
文件大?。?/td> 233K
代理商: MP8650DN-Z
MP8650 – 15A, 28V, HIGH FREQUENCY STEP-DOWN WITH SYNCHRONOUS GATE DRIVER
MP8650 Rev. 0.2
www.MonolithicPower.com
7
12/13/2007
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2007 MPS. All Rights Reserved.
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.2
MP8650
SW
BST
C
L
BST
C
5V or 3.3V
OUT
External BST Diode
IN4148
Figure 2—Add Optional External Bootstrap
Diode to Enhance Efficiency
The recommended external BST diode is
IN4148, and the BST cap is 0.1~1F.
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