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LM7912CT
+BOMIC REG LINEAR -12V 1A TO220-3
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メーカーオンセミコンダクター社
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メーカー品番 #LM7912CT
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パッケージ TO-220 (NDE)-3
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在庫状況6126
365 日間品質保証
7*24 日間の品質保証
90-時間単位のサービス保証
1日間のアフターサービス保証
仕様
| 属性 | 値 |
| Package | Tube |
| ProductStatus | Obsolete |
| OutputConfiguration | Negative |
| OutputType | Fixed |
| NumberofRegulators | 1 |
| Voltage-Input(Max) | -35V |
| Voltage-Output(Min/Fixed) | -12V |
| VoltageDropout(Max) | 2V @ 1A (Typ) |
| Current-Output | 1A |
| Current-Quiescent(Iq) | 6 mA |
| PSRR | 60dB (120Hz) |
| ProtectionFeatures | Over Temperature, Short Circuit |
| OperatingTemperature | 0°C ~ 125°C |
| MountingType | Through Hole |
| Package/Case | TO-220-3 |
概要
Description
Key features of the LM7912CT include:
1. Output Voltage: -12V with a typical output current of up to 1.5A, making it suitable for medium-power applications.
2. Input Requirements: The input voltage must be at least 2V higher than the output voltage to ensure proper regulation.
3. Thermal Overload Protection: Protects the IC from overheating, enhancing reliability.
4. Short-Circuit Protection: Prevents damage due to temporary short circuits in the output.
5. Ease of Use: Requires minimal external components, typically a couple of capacitors, for stable operation.
The LM7912CT is widely used in power supply designs due to its robustness, reliability, and ease of integration into various electronic applications.
Equivalent
Features
1. Output Voltage: -12V regulated output.
2. Output Current: Capable of delivering up to 1.5A.
3. Input Voltage Range: Typically requires an input voltage of -15V to -35V.
4. Regulation: Provides excellent line and load regulation.
5. Protection Features: Includes thermal shutdown and current limiting to prevent damage due to overheating or overcurrent conditions.
6. Temperature Range: Operates efficiently within the temperature range of 0°C to +125°C.
7. Package Type: Commonly available in a TO-220 package, supporting easy heat dissipation.
8. Dropout Voltage: Low dropout voltage for improved performance.
9. Stability: Stable with low noise and minimal external components.
10. Applications: Ideal for use in power supply circuits, electronic devices, and instrumentation requiring a stable negative voltage.
These features make the LM7912CT a reliable choice for applications needing a steady negative voltage supply.
Pinout
The pin count for the LM7912CT is three, and the functions of these pins are as follows:
1. Input (Pin 1): This is where the unregulated input voltage is applied. The voltage at this pin must be at least a couple of volts higher (in magnitude) than the desired output voltage for proper regulation.
2. Ground (Pin 2): This pin is connected to the ground of both the input and output circuits. It serves as a reference point for the input and output voltages.
3. Output (Pin 3): This pin provides the regulated output voltage of -12V. It is connected to the load that requires this specific voltage.
The LM7912CT is commonly used in power supply circuits where a stable negative voltage is required, such as in dual-rail power supplies for operational amplifiers and other analog circuits.
Manufacturer
1. Texas Instruments (TI): An American technology company headquartered in Dallas, Texas, TI is known for designing and manufacturing semiconductors and various integrated circuits. TI is a global leader in analog and embedded processing products.
2. ON Semiconductor (now onsemi): Based in Phoenix, Arizona, onsemi is known for producing a variety of semiconductor components. The company specializes in power and signal management, logic, discrete, and custom devices for a range of applications.
3. STMicroelectronics: A Franco-Italian multinational corporation, STMicroelectronics is headquartered in Geneva, Switzerland. It is one of the world's largest semiconductor companies, supplying products across sectors like consumer electronics, automotive, and industrial.
These companies design and manufacture integrated circuits and electronic components for a wide range of applications. The LM7912CT is a negative voltage regulator chip, part of the 79xx series, commonly used in electronics to provide a stable output voltage.
Application
1. Power Supplies: Used in dual polarity power supplies for operational amplifiers and audio equipment.
2. Telecommunications: Offers stable voltage for communication devices requiring negative voltage rails.
3. Instrumentation: Provides reliable voltage for precision measurement equipment.
4. Industrial Automation: Used in control systems that require negative voltage inputs.
5. Consumer Electronics: Powers circuits in devices like radios and televisions that need a negative voltage rail.
Its robust design ensures thermal protection and short-circuit safety, making it suitable for various electronic applications.