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参数资料
| 型号： | LTM4603IV-1#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 19/26页 |
| 文件大小： | 0K |
| 描述： | IC DC/DC UMODULE 6A 118-LGA |
| 产品培训模块： | Power Module vs. Discrete DC to DC |
| 软件下载： | LTM4603-1 Spice Model |
| 产品目录绘图： | LTM Series_15x15x2.8 |
| 设计资源： | LTM4603IV-1#PBF Footprint.bxl |
| 特色产品： | μModule Products |
| 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）： | 6A |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 118-LGA |
| 尺寸/尺寸： | 0.59" L x 0.59" W x 0.11" H（15.0mm x 15.0mm x 2.8mm） |
| 包装： | 托盘 |
| 工作温度： | -40°C ~ 85°C |
| 效率： | 93% |
| 产品目录页面： | 2711 (CN2011-ZH PDF) |
LTM4603/LTM4603-1
APPLICATIONS INFORMATION
and are improved with air flow. The case temperature is
maintained at 100°C or below for the derating curves.
This allows for 4W maximum power dissipation in the
total module with top and bottom heat sinking, and 2W
power dissipation through the top of the module with an
approximate θ JC between 6°C/W to 9°C/W. This equates
to a total of 124°C at the junction of the device.
Safety Considerations
The LTM4603 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.
Layout Checklist/Example
The high integration of LTM4603 makes the PCB board
layout very simple and easy. However, to optimize its electri-
cal and thermal performance, some layout considerations
are still necessary.
? Use large PCB copper areas for high current path, in -
cluding V IN , PGND 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 , PGND and V OUT pins to minimize
high frequency noise.
? Place a dedicated power ground layer underneath the
unit.
V IN
? 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 pads.
? If vias are placed onto the pads, the the vias must be
capped.
? Interstitial via placement can also be used if necessary.
? Use a separated SGND ground copper area for com -
ponents connected to signal pins. Connect the SGND
to PGND underneath the unit.
Figure 15 gives a good example of the recommended layout.
Frequency Adjustment
The LTM4603 is designed to typically operate at 1MHz
across most input conditions. The f SET pin is typically
left open. The switching frequency has been optimized
for maintaining constant output ripple noise over most
operating ranges. The 1MHz switching frequency and
the 400ns minimum off time can limit operation at higher
duty cycles like 5V IN to 3.3V OUT , and produce excessive
inductor ripple currents for lower duty cycle applications
such as 20V IN to 5V OUT . The 5V OUT and 3.3V OUT drop
out curves are modified by adding an external resistor on
the f SET pin to allow for lower input voltage operation, or
higher input voltage operation.
C IN
C IN
GND
SIGNAL
GND
C OUT
C OUT
V OUT
4603 F15
Figure 15. Recommended Layout
4603fb
19
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTM4603IV-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:6A DC/DC μModule with PLL, Output Tracking and Margining |
| LTM4603V | 制造商:LINER 制造商全称:Linear Technology 功能描述:6A DC/DC μModule with PLL, Output Tracking and Margining |
| LTM4603V-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:6A DC/DC μModule with PLL, Output Tracking and Margining |
| LTM4604 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Low Voltage, 4A DC/DC μModuleTM with Tracking |
| LTM4604A | 制造商:LINER 制造商全称:Linear Technology 功能描述:Low Voltage, 4A DC/DC μModule with Tracking |
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