参数资料
型号: LTM4627MPY#PBF
厂商: Linear Technology
文件页数: 23/32页
文件大小: 0K
描述: IC DC/DC UMODULE 15A 133-BGA
产品目录绘图: LTM Series_15x15x4.3
标准包装: 119
系列: µModule®
类型: 非隔离(POL)
输出数: 1
电压 - 输入(最小): 4.5V
电压 - 输入(最大): 20V
Voltage - Output 1: 0.6 ~ 5 V
电流 - 输出(最大): 15A
安装类型: 表面贴装
封装/外壳: 133-BGA
尺寸/尺寸: 0.59" L x 0.59" W x 0.19" H(15.0mm x 15.0mm x 4.9mm)
包装: 托盘
工作温度: -55°C ~ 125°C
效率: 93%
LTM4627
APPLICATIONS INFORMATION
Safety Considerations
The LTM4627 modules do not provide isolation from V IN
to V OUT . There is no internal fuse. If required, a slow blow
fuse with a rating twice the maximum input current needs
to be provided to protect each unit from catastrophic
failure. The device does support overvoltage protection
and overcurrent protection.
Layout Checklist/Example
The high integration of the LTM4627 makes the PCB
board layout very simple and easy. However, to optimize
its electrical and thermal performance, some layout con-
siderations are still necessary.
? Use large PCB copper areas for high current paths,
including V IN , GND and V OUT . It helps to minimize the
PCB conduction loss and thermal stress.
? Place high frequency ceramic input and output capaci-
tors next to the V IN , GND and V OUT pins to minimize
high frequency noise.
V IN
? Place a dedicated power ground layer underneath the
unit.
? To minimize the via conduction loss and reduce module
thermal stress, use multiple vias for interconnection
between top layer and other power layers.
? Do not put vias directly on the pad, unless they are
capped or plated over.
? Place test points on signal pins for testing.
? Use a separated SGND ground copper area for com-
ponents connected to signal pins. Connect the SGND
to GND underneath the unit.
? For parallel modules, tie the COMP and V FB pins to-
gether. Use an internal layer to closely connect these
pins together.
Figure 17 gives a good example of the recommended
layout. LGA and BGA PCB layouts are identical with the
exception of circle pads for BGA (see Package Description).
C IN
C IN
CONTROL
GND
SIGNAL
GROUND
V OUT
C OUT
C OUT
Figure 17. Recommended PCB Layout
(LGA Shown, for BGA Use Circle Pads)
V OUT
4627 F17
4627fc
For more information www.linear.com/LTM4627
23
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