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參數資料
| 型號： | MC78L12ACPREG |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
| 中文描述： | 12 V FIXED POSITIVE REGULATOR, PBCY3 |
| 封裝： | LEAD FREE, TO-92, 3 PIN |
| 文件頁數： | 8/16頁 |
| 文件大小： | 136K |
| 代理商： | MC78L12ACPREG |
MC78L00A Series, NCV78L00A
http://onsemi.com
8
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
highfrequency characteristics to insure stable operation
under all load conditions. A 0.33 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 F
R
I
O
MC78L05A
Constant
Current to
Grounded Load
+
MC1741
+20V
0.33 F
MC78L15A
+V
O
10k
10k
V
O
7
6
2
3
4
6.5
20V
MPS A70
MPS U55
0.33 F
0.33 F
+V
I
V
I
MC78LXXA
MC79LXXA
+V
O
V
O
0.33 F
0.1 F
0.1 F
Figure 11. Positive and Negative Regulator
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MC78L12ACPRM | 功能描述:線性穩壓器 - 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 負載調節: 最大輸入電壓:5.5 V 線路調整率: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| MC78L12ACPRMG | 功能描述:線性穩壓器 - 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 負載調節: 最大輸入電壓:5.5 V 線路調整率: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| MC78L12ACPRP | 功能描述:線性穩壓器 - 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 負載調節: 最大輸入電壓:5.5 V 線路調整率: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| MC78L12ACPRPG | 功能描述:線性穩壓器 - 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 負載調節: 最大輸入電壓:5.5 V 線路調整率: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| MC78L12ACPX | 功能描述:線性穩壓器 - 標準 Pos Voltage Reg 3Term 0.1a 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 負載調節: 最大輸入電壓:5.5 V 線路調整率: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
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