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參數(shù)資料
| 型號： | MC78L12 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | 100 mA Positive Voltage Regulators(100 mA 正電壓輸出穩(wěn)壓器) |
| 中文描述： | 一〇 〇毫安正電壓穩(wěn)壓器（一〇 〇毫安正電壓輸出穩(wěn)壓器） |
| 文件頁數(shù)： | 7/12頁 |
| 文件大?。?/td> | 90K |
| 代理商： | MC78L12 |
MC78L00A Series, NCV78L05A
http://onsemi.com
7
APPLICATIONS INFORMATION
Design Considerations
The MC78L00A Series of fixed voltage regulators are
designed with Thermal Overload Protection that shuts
down the circuit when subjected to an excessive power
overload condition. Internal Short Circuit Protection limits
the maximum current the circuit will pass.
In many low current applications, compensation
capacitors are not required. However, it is recommended
that the regulator input be bypassed with a capacitor if the
regulator is connected to the power supply filter with long
wire lengths, or if the output load capacitance is large. The
input bypass capacitor should be selected to provide good
high–frequency characteristics to insure stable operation
under all load conditions. A 0.33
μ
F or larger tantalum,
mylar, or other capacitor having low internal impedance at
high frequencies should be chosen. The bypass capacitor
should be mounted with the shortest possible leads directly
across the regulators input terminals. Good construction
techniques should be used to minimize ground loops and
lead resistance drops since the regulator has no external
sense lead. Bypassing the output is also recommended.
Figure 9. Current Regulator
Figure 10.
±
15 V Tracking Voltage Regulator
The MC78L00 regulators can also be used as a current source
when connected as above. In order to minimize dissipation the
MC78L05C is chosen in this application. Resistor R determines
the current as follows:
I
O
=5.R
B
For example, a 100 mA current source would require R to be a
50
, 1/2 W resistor and the output voltage compliance would be
the input voltage less 7 V.
I
IB
= 3.8 mA over line and load changes
Input
0.33
μ
F
R
I
O
MC78L05A
Constant
Current to
Grounded Load
-
+
MC1741
+20V
0.33
μ
F
MC78L15A
+V
O
10k
10k
-V
O
7
6
2
3
4
6.5
20V
MPS A70
MPS U55
0.33
μ
F
0.33
μ
F
+V
I
-V
I
0.33
μ
F
MC78LXXA
MC79LXXA
+V
O
-V
O
0.1
μ
F
0.1
μ
F
Figure 11. Positive and Negative Regulator
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC78L12A | 制造商:BOCA 制造商全稱:Boca Semiconductor Corporation 功能描述:3-TERMINAL 0.1A NEGATIVE VOLTAGE REGULATORS |
| MC78L12AB | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Three-Terminal Low Current Positive Voltage Regulators |
| MC78L12ABD | 功能描述:線性穩(wěn)壓器 - 標準 12V 100mA Postive RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| MC78L12ABDG | 功能描述:線性穩(wěn)壓器 - 標準 12V 100mA Postive RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| MC78L12ABDG | 制造商:ON Semiconductor 功能描述:IC LDO VOLT REG 12V 0.1A 8-SOIC 制造商:ON Semiconductor 功能描述:IC, LDO VOLT REG, 12V, 0.1A, 8-SOIC |
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