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| 型号： | MIC94044YFL TR |
| 厂商： | Micrel Inc |
| 文件页数： | 7/9页 |
| 文件大小： | 0K |
| 描述： | IC LOAD SW HI-SIDE 3A 4MLF |
| 标准包装： | 1 |
| 类型： | 高端 |
| 输入类型： | 非反相 |
| 输出数： | 1 |
| 导通状态电阻： | 55 毫欧 |
| 电流 - 输出 / 通道： | 3A |
| 电源电压： | 1.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 4-WDFN，4-MLF? |
| 供应商设备封装： | 4-MLF?（1.2x1.2） |
| 包装： | 标准包装 |
| 其它名称： | 576-3972-6 |
Micrel, Inc.
Example:
A switch is intended to drive a 2A load and is placed on
a printed circuit board which has a ground plane area of
at least 25mm x 25mm (625mm 2 ). The Voltage source is
a Li-ion battery with a lower operating threshold of 3V
and the ambient temperature of the assembly can be up
to 50 o C.
Figure 4: Excerpt from the LDO Book
MIC94044/5
Summary of variables:
I SW = 2A
V IN = 3V to 4.2V
T A = 50 o C
R θ JC = 90 o C/W from Datasheet
R θ CA = 53 o C/W Read from Graph in Figure 4
P DISS = I SW2 x R SWmax
The worst case switch resistance (R SWmax ) at the lowest
V IN of 3V is not available in the datasheet, so the next
lower value of V IN is used.
R SWmax @ 2.5V = 90m Ω
If this were a figure for worst case R SWmax for 25 o C, an
additional consideration is to allow for the maximum
junction temperature of 125 o C, the actual worst case
resistance in this case can be 30% higher (See R DSON
variance vs. temperature graph). However, 90m ? is the
maximum over temperature.
Therefore:
T J = 2 2 x 0.090 x (90+53) + 50
T J = 101 o C
This is below the maximum 125 o C.
March 2011
7
M9999-032311-A
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC94045YFL | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:28mΩ RDSON 3A High Side Load Switch in 1.2mm x 1.2mm MLF? Package |
| MIC94045YFL TR | 功能描述:电源开关 IC - USB High-Side Load Switch 3A, 28mohm RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| MIC94045YFLTR | 制造商:Micrel Inc 功能描述:Power Switch Hi Side 1.7 5.5V 3A 4MLF |
| MIC94045YFL-TR | 功能描述:IC LOAD SW HI-SIDE 3A 4MLF 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:有效 开关类型:通用 输出数:1 比率 - 输入:输出:1:1 输出配置:高端 输出类型:P 通道 接口:开/关 电压 - 负载:1.7 V ~ 5.5 V 电压 - 电源（Vcc/Vdd）:不需要 电流 - 输出（最大值）:3A 导通电阻（典型值）:28 毫欧 输入类型:非反相 特性:负载释放，压摆率受控型 故障保护:- 工作温度:-40°C ~ 125°C （TJ） 封装/外壳:4-WDFN，4-MLF? 供应商器件封装:4-MLF?（1.2x1.2） 标准包装:1 |
| MIC9404X | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:28mΩ RDSON 3A High Side Load Switch in 1.2mm x 1.2mm MLF? package |
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