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LM2940CT-12/NOPB
LM2940CT-12/NOPB LDO REG 1A LDO Voltage Regulators
LM2940CT-12/NOPB
LM2940CT-12/NOPB LDO REG 1A LDO Voltage Regulators
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Manufacturer Part # : LM2940CT-12/NOPB
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Package/Case: TO220-3
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Brand: Texas Instruments
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Product Categories : Voltage Regulators - Linear, Low Drop Out (LDO) Regulators
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Service & Packaging
Service & Packaging
About After Sales Service
All Parts Extended Quality Guarantee
Initiate the application within 90 days from the shipment date.
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LM2940CT-12/NOPB DataSheet
Current price plan is under preparation. Please contact our customer service team for the latest pricing information. Thank you for your understanding and support!
Details
In addition to its technical capabilities, the LM2940CT-12/NOPB is designed to withstand harsh operating conditions, including vehicular use. Its built-in protection features ensure that the regulator and connected circuitry remain safe and operational, even during voltage transients or reverse battery installations. This level of robustness makes it a reliable choice for automotive or industrial applications where electrical hazards are a concern
Key Features
- Compact Design for Space-Limited Applications
- Silicon-Based Construction with Low Thermal Impedance
- High-Power Switching Regulator in a Single Package
- Efficient Heat Dissipation through Internal Metal Frame
- Fault-Tolerant Operation for Reliable System Performance
- Pulse-Skipping Pulse-Width Modulation (PWM) Technique
Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
| Output options | Fixed Output | Iout (max) (A) | 1 |
| Vin (max) (V) | 26 | Vin (min) (V) | 6 |
| Vout (max) (V) | 15 | Vout (min) (V) | 5 |
| Fixed output options (V) | 5, 9, 12, 15 | Noise (µVrms) | 150 |
| Iq (typ) (mA) | 10 | Thermal resistance θJA (°C/W) | 23 |
| Rating | Catalog | Load capacitance (min) (µF) | 22 |
| Regulated outputs (#) | 1 | Accuracy (%) | 5 |
| PSRR at 100 KHz (dB) | 54 | Dropout voltage (Vdo) (typ) (mV) | 500 |
| Operating temperature range (°C) | 0 to 125 |
FAQs
What is LM2940CT-12/NOPB?
The LM2940CT-12/NOPB is a low dropout (LDO) linear voltage regulator designed by Texas Instruments. It provides a fixed output voltage of 12V and is ideal for applications requiring a stable power supply with low dropout voltage, such as automotive, industrial, and communication systems.
How Does LM2940CT-12/NOPB Work?
The LM2940CT-12/NOPB operates as a linear regulator, maintaining a constant output voltage of 12V with low dropout voltage, meaning it can regulate the output voltage even when the input voltage is very close to the output voltage. It features an internal pass transistor and a reference voltage, which are controlled to maintain a stable output. The device also includes built-in protection features such as current limiting and thermal shutdown.
How Many Pins does LM2940CT-12/NOPB have and What are the Functions of the Pinout Configuration?
The LM2940CT-12/NOPB is housed in a 3-lead TO-220 package. The pinout configuration includes:
- Input: Input voltage pin where the unregulated input voltage is applied.
- Output: Regulated output voltage pin that provides the 12V output.
- Ground: Common ground pin for the input and output.
What are the Pros and Cons of LM2940CT-12/NOPB?
Pros:
- Low Dropout Voltage: Operates efficiently even with a small difference between input and output voltage.
- Stable Output: Provides a stable 12V output suitable for various applications.
- Built-in Protection: Includes features such as current limiting and thermal shutdown for safe operation.
- High Current Capability: Can supply high output current, making it suitable for demanding applications.
Cons:
- Power Dissipation: As a linear regulator, it can dissipate significant power as heat, requiring proper heat sinking.
- Efficiency: Less efficient compared to switching regulators, especially with large differences between input and output voltage.
- Size: The TO-220 package may be larger compared to surface-mount alternatives, limiting use in compact designs.
Are There Any Equivalents/Alternatives to LM2940CT-12/NOPB for Recommendation?
- The LM2940S-12 from Texas Instruments is a similar low dropout regulator with different packaging options.
- Alternatives to the LM2940CT-12/NOPB include the LT1086-12 from Analog Devices and the MC7812 from ON Semiconductor.
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