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| 型号： | LTM4614EV#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 11/20页 |
| 文件大小： | 0K |
| 描述： | IC UMODULE DC/DC DUAL 4A 144LGA |
| 产品培训模块： | Power Module vs. Discrete DC to DC |
| 软件下载： | LTM4614 |
| 产品目录绘图： | LTM Series_15x15x2.8 |
| 设计资源： | DC1385A Design Files |
| 特色产品： | μModule Products DC/DC μModule Regulator Family |
| 标准包装： | 119 |
| 系列： | µModule® |
| 类型： | 非隔离（POL） |
| 输出数： | 2 |
| 电压 - 输入（最小）： | 2.38V |
| 电压 - 输入（最大）： | 5.5V |
| Voltage - Output 1： | 0.8 ~ 5 V |
| Voltage - Output 2： | 0.8 ~ 5 V |
| 电流 - 输出（最大）： | 4A，4A |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 144-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 ~ 125°C |
| 效率： | 95% |
| 产品目录页面： | 2711 (CN2011-ZH PDF) |
| 配用： | DC1385A-ND - BOARD EVAL LTM4614 |
LTM4614
APPLICATIONS INFORMATION
+ R FB
V OUT = 0.8V ?
ParallelSwitchingRegulatorOperation
The LTM4614 switching regulators are inherently current
mode control. Paralleling will have very good current shar-
ing. This will balance the thermals on the design. Figure
13 shows a schematic of a parallel design. The voltage
feedback equation changes with the variable N as chan-
nels are paralleled.
The equation:
4.99k
N
R FB
N is the number of paralleled channels.
Thermal Considerations and Output Current Derating
The power loss curves in Figures 5 and 6 can be used
in coordination with the load current derating curves in
Figures 7 to 10 for calculating an approximate θ JA thermal
resistance for the LTM4614 with various heat sinking
2.5
2.0
and airflow conditions. Both of the LTM4614 outputs
are at full 4A load current, and the power loss curves in
Figures 5 and 6 are combined power losses plotted for
both output voltages up to 4A each. The 4A output voltages
are 1.2V and 3.3V. These voltages are chosen to include
the lower and higher output voltage ranges for correlating
the thermal resistance. Thermal models are derived from
several temperature measurements in a controlled tem-
perature chamber along with thermal modeling analysis.
The junction temperatures are monitored while ambient
temperature is increased with and without airflow. The
junctions are maintained at ~120°C while lowering output
current or power while increasing ambient temperature.
The 120°C is chosen to allow for a 5°C margin window
relative to the maximum 125°C. The decreased output
current will decrease the internal module loss as ambi-
ent temperature is increased. The power loss curves in
Figures 5 and 6 show this amount of power loss as a
function of load current that is specified for both chan-
nels. The monitored junction temperature of 120°C minus
the ambient operating temperature specifies how much
3.0
2.5
2.0
1.5
1.5
1.0
1.0
0.5
0.5
0
0
1
2
3
V IN = 5V
4
0
0
1
2
3
V IN = 5V
4
LOAD CURRENT (A)
4614 F05
LOAD CURRENT (A)
4614 F06
Figure 5. 1.2V Power Loss
Figure 6. 3.3V Power Loss
4614fb
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTM4614IV | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual 4A per Channel Low VIN DC/DC μModule Regulator |
| LTM4614IV#PBF | 功能描述:IC UMODULE DC/DC DUAL 4A 144LGA RoHS:是 类别:电源 - 板载 >> DC DC Converters 系列:µModule® 设计资源:VI-200, VI-J00 Design Guide, Appl Manual 标准包装:1 系列:* 类型:隔离 输出数:1 电压 - 输入（最小）:66V 电压 - 输入（最大）:160V Voltage - Output 1:12V Voltage - Output 2:- Voltage - Output 3:- 电流 - 输出（最大）:* 电源（瓦） - 制造商系列:50W 电压 - 隔离:* 特点:* 安装类型:通孔 封装/外壳:9-FinMod 尺寸/尺寸:4.60" L x 1.86" W x 0.79" H（116.8mm x 47.2mm x 20.1mm） 包装:散装 工作温度:-25°C ~ 85°C 效率:* 电源（瓦特）- 最大:* |
| LTM4614IVPBF | 制造商:Linear Technology 功能描述:Conv DC-DC Dual Step-Down 5.5V LGA144 |
| LTM4615 | 制造商:LINER 制造商全称:Linear Technology 功能描述:三路輸出、低電壓DC/DC μModule 穩壓器,LTM®4615 是一款具有一個額外 1.5A VLDO (非常低壓差)線性穩壓器的完整 4A 雙路輸出開關模式 DC/DC 電源 |
| LTM4615EV | 制造商:LINER 制造商全称:Linear Technology 功能描述:Triple Output, Low Voltage DC/DC μModule Regulator |
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