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參數資料
| 型號： | MIC5238-1.1BD5 |
| 廠商： | MICREL INC |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Coaxial Cable; Coaxial RG/U Type:11; Impedance:75ohm; Conductor Size AWG:15; No. Strands x Strand Size:19 x 27; Jacket Material:Fluoropolymer; Conductor Material:Copper; Jacket Color:Black; Leaded Process Compatible:Yes |
| 中文描述： | 1.1 V FIXED POSITIVE LDO REGULATOR, 0.5 V DROPOUT, PDSO6 |
| 封裝： | TSOT-23, 5 PIN |
| 文件頁數： | 9/10頁 |
| 文件大?。?/td> | 120K |
| 代理商： | MIC5238-1.1BD5 |
August 2003
9
MIC5238
MIC5238
Micrel
current of 150mA. The input ground current under these
conditions is 2mA, while the bias current is only 20
μ
A. If we
calculate the conversion efficiency using the single supply
approach, it is as follows:
Input power = V
IN
×
output current + V
IN
×
(V
BIAS
ground
current + V
IN
ground current)
Input power = 2.5V
×
150mA + 2.5
×
(0.0002+0.002) =
380.5mW
Output power = 1V
×
0.15 = 150mW
Efficiency = 150/380.5
×
100 = 39.4%
Now, using a lower input supply of 1.5V, and powering the
bias voltage only from the 2.5V input, the efficiency is as
follows:
Input power = V
IN
×
output current + V
IN
×
V
IN
ground current
+ V
BIAS
x V
BIAS
ground current
Input power = 1.5
×
150mA + 1.5
×
0.002 + 2.5
×
0.0002 =
225mW
Output power = 1V
×
150mA = 150mW
Efficiency = 150/225
×
100 = 66.6 %
Therefore, by using the dual supply MIC5238 LDO the
efficiency is nearly doubled over the single supply version.
This is a valuable asset in portable power management
applications equating to longer battery life and less heat
being generated in the application.
This in turn will allow a smaller footprint design and an
extended operating life.
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| MIC5239 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Low Quiescent Current 500mA UCap LDO Regulator |
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| MIC5239-1.5BM | 功能描述:IC REG LDO 1.5V .5A 8-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:500 系列:- 穩(wěn)壓器拓撲結構:正，固定式 輸出電壓:12V 輸入電壓:14.5 V ~ 35 V 電壓 - 壓降（標準）:- 穩(wěn)壓器數量:1 電流 - 輸出:500mA 電流 - 限制（最?。?- 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:TO-205AD，TO-39-3 金屬罐 供應商設備封裝:TO-39 包裝:散裝 其它名稱:*LM78M12CH*LM78M12CH/NOPBLM78M12CH |
| MIC5239-1.5BM TR | 功能描述:IC REG LDO 1.5V .5A 8-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:500 系列:- 穩(wěn)壓器拓撲結構:正，固定式 輸出電壓:12V 輸入電壓:14.5 V ~ 35 V 電壓 - 壓降（標準）:- 穩(wěn)壓器數量:1 電流 - 輸出:500mA 電流 - 限制（最?。?- 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:TO-205AD，TO-39-3 金屬罐 供應商設備封裝:TO-39 包裝:散裝 其它名稱:*LM78M12CH*LM78M12CH/NOPBLM78M12CH |
| MIC5239-1.5BMM | 功能描述:IC REG LDO 1.5V .5A 8-MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:500 系列:- 穩(wěn)壓器拓撲結構:正，固定式 輸出電壓:12V 輸入電壓:14.5 V ~ 35 V 電壓 - 壓降（標準）:- 穩(wěn)壓器數量:1 電流 - 輸出:500mA 電流 - 限制（最?。?- 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:TO-205AD，TO-39-3 金屬罐 供應商設備封裝:TO-39 包裝:散裝 其它名稱:*LM78M12CH*LM78M12CH/NOPBLM78M12CH |
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