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参数资料
| 型号： | MIC5190BMM |
| 厂商： | Micrel Inc |
| 文件页数： | 12/13页 |
| 文件大小： | 463K |
| 描述： | IC REG CTRLR SGL POS ADJ 10MSOP |
| 标准包装： | 100 |
| 类型： | 正，可调式 |
| 输出数： | 1 |
| 输出电压： | 可调 |
| 电流 - 电源： | 15mA |
| 输入电压： | 0.9 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 管件 |
MIC5190
Micrel
Using the MIC5190 as a filter for a switching regulator
reduces output noise due to ripple and high frequency switch-
ing noise. It also reduces undershoot (Figure 12) and over-
shoot (Figure 13) due to load transients with decreased
capacitance.
Figure 13. Transient Response
Due to the high DC gain (80dB) of the MIC5190, it also adds
increased output accuracy and extremely high load regula-
tion.
Distributed Power Supply
As technology advances and processes move to smaller and
smaller geometries, voltage requirements go down and cur-
rent requirements go up. This creates unique challenges
when trying to supply power to multiple devices on a board.
When there is one load to power, the difficulties are not quite
as complex; trying to distribute power to multiple loads from
one supply is much more problematic.
If a large circuit board has multiple small-geometry ASICs, it
will require the powering of multiple loads with its one power
source. Assuming that the ASICs are dispersed throughout
the board and that the core voltage requires a regulated 1V,
Figure 14 shows the long traces from the power supply to the
ASIC loads. Not only do we have to contend with the toler-
ance of the supply (line regulation, load regulation, output
accuracy, and temperature tolerances), but the trace lengths
create additional issues with resistance and inductance. With
lower voltages these parasitic values can easily bump the
output voltage out of a usable tolerance.
Load
Load
Switching
Power
Supply
Circuit Board
Load
Load
Long Traces
Figure 14. Board Layout
But by placing multiple small MIC5190 circuits close to each
load, the parasitic trace elements caused by distance to the
power supply are almost completely negated. By adjusting
the switching supply voltage to 1.2V, for our example, the
MIC5190 will provide accurate 1V output, efficiently and with
very little noise.
Figure 15. Improved Distributed Supplies
Load
Load
Switching
Power
Supply
Circuit Board
Load
Load
MIC5190
MIC5190
MIC5190
MIC5190
TIME (100祍/div)
December 2005
12
M9999-120105
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC5190BMM TR | 功能描述:IC REG CTRLR SGL POS ADJ 10-MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性晶体管驱动器 系列:- 产品培训模块:More Information on LDOs 标准包装:2,500 系列:- 类型:正，固定式 输出数:2 输出电压:2.8V，3.3V 电流 - 电源:12mA 输入电压:5 V ~ 22 V 工作温度:0°C ~ 70°C 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) |
| MIC5190YML | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Ultra High-Speed, High-Current Active Filter/LDO Controller |
| MIC5190YML TR | 功能描述:低压差控制器 - LDO Ultra Hi-Speed Hi-Current Active Filter/LDO Controller(Lead Free) RoHS:否 制造商:Micrel 最大输入电压:5.5 V 输出电压:Adjustable 输出电流:10 mA 负载调节: 输出类型:Adjustable, Fixed 输出端数量:1 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-6 |
| MIC5190YMM | 功能描述:低压差控制器 - LDO Ultra Hi-Speed Hi-Current Active Filter/LDO Controller(Lead Free) RoHS:否 制造商:Micrel 最大输入电压:5.5 V 输出电压:Adjustable 输出电流:10 mA 负载调节: 输出类型:Adjustable, Fixed 输出端数量:1 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-6 |
| MIC5190YMM TR | 功能描述:低压差控制器 - LDO Ultra Hi-Speed Hi-Current Active Filter/LDO Controller(Lead Free) RoHS:否 制造商:Micrel 最大输入电压:5.5 V 输出电压:Adjustable 输出电流:10 mA 负载调节: 输出类型:Adjustable, Fixed 输出端数量:1 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-6 |
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