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參數(shù)資料
| 型號： | MC78L12CP |
| 廠商： | MOTOROLA INC |
| 元件分類： | 固定正電壓單路輸出標準穩(wěn)壓器 |
| 英文描述： | Low Pin Count Synchronous Buck DC/DC Controller 10-SON -40 to 85 |
| 中文描述： | 12 V FIXED POSITIVE REGULATOR, PBCY3 |
| 封裝： | PLASTIC, POWER PACK-3 |
| 文件頁數(shù)： | 7/8頁 |
| 文件大?。?/td> | 157K |
| 代理商： | MC78L12CP |
MC78L00, A Series
7
MOTOROLA ANALOG IC DEVICE DATA
APPLICATIONS INFORMATION
Design Considerations
The MC78L00 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
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 7. Current Regulator
Figure 8.
± 15 V Tracking Voltage Regulator
Figure 9. Positive and Negative 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:
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.
IO =
5.0 V
+ IB
IIB = 3.8 mA over line and load changes
Input
0.33
F
R
IO
MC78L05
Constant
Current to
Grounded Load
–
+
MC1741
+20V
0.33
F
MC78L15
+VO
10k
–VO
7
6
2
3
4
6.5
20V
MPS A70
MPS U55
0.33
F
0.33
F
+VI
–VI
MC78LXX
MC79LXX
+VO
–VO
0.33
F
0.1
F
0.1
F
R
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MC78L12F | 制造商:MCC 制造商全稱:Micro Commercial Components 功能描述:Three-Terminal Low Current Positive Voltage Regulator |
| MC78L12F_08 | 制造商:MCC 制造商全稱:Micro Commercial Components 功能描述:Three-Terminal Low Current Positive Voltage Regulator |
| MC78L12F-TP | 功能描述:IC REG LDO 12V .1A SOT-89 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:3,000 系列:- 穩(wěn)壓器拓撲結構:正，固定式 輸出電壓:3.8V 輸入電壓:最高 16V 電壓 - 壓降（標準）:0.3V @ 80mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:80mA 電流 - 限制（最小）:- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應商設備封裝:SOT-23-5 包裝:帶卷 (TR) 其它名稱:MIC5203-3.8BM5TRMIC5203-3.8BM5TR-ND |
| MC78L15A | 制造商:BOCA 制造商全稱:Boca Semiconductor Corporation 功能描述:3-TERMINAL 0.1A NEGATIVE VOLTAGE REGULATORS |
| MC78L15AB | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Three-Terminal Low Current Positive Voltage Regulators |
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