參數(shù)資料
型號(hào)： MIC5190BMM TR
廠商： Micrel Inc
文件頁(yè)數(shù)： 12/13頁(yè)
文件大?。?/td> 463K
描述： IC REG CTRLR SGL POS ADJ 10-MSOP
標(biāo)準(zhǔn)包裝： 2,500
類型： 正，可調(diào)式
輸出數(shù)： 1
輸出電壓： 可調(diào)
電流 - 電源： 15mA
輸入電壓： 0.9 V ~ 5.5 V
工作溫度： -40°C ~ 125°C
封裝/外殼： 10-TFSOP，10-MSOP（0.118"，3.00mm 寬）
供應(yīng)商設(shè)備封裝： 10-MSOP
包裝： 帶卷 (TR)
其它名稱： MIC5190BMMTR
MIC5190BMMTR-ND
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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參數(shù)描述
MIC5190YML 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Ultra High-Speed, High-Current Active Filter/LDO Controller
MIC5190YML TR 功能描述:低壓差控制器 - LDO Ultra Hi-Speed Hi-Current Active Filter/LDO Controller(Lead Free) RoHS:否 制造商:Micrel 最大輸入電壓:5.5 V 輸出電壓:Adjustable 輸出電流:10 mA 負(fù)載調(diào)節(jié): 輸出類型:Adjustable, Fixed 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-6
MIC5190YMM 功能描述:低壓差控制器 - LDO Ultra Hi-Speed Hi-Current Active Filter/LDO Controller(Lead Free) RoHS:否 制造商:Micrel 最大輸入電壓:5.5 V 輸出電壓:Adjustable 輸出電流:10 mA 負(fù)載調(diào)節(jié): 輸出類型:Adjustable, Fixed 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-6
MIC5190YMM TR 功能描述:低壓差控制器 - LDO Ultra Hi-Speed Hi-Current Active Filter/LDO Controller(Lead Free) RoHS:否 制造商:Micrel 最大輸入電壓:5.5 V 輸出電壓:Adjustable 輸出電流:10 mA 負(fù)載調(diào)節(jié): 輸出類型:Adjustable, Fixed 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-23-6
MIC5191 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Ultra High-Speed, High-Current Active Filter / LDO Controller
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