LM2940IMP-12/NOPB

LDO Voltage Regulators 1A LDO REG
6,487 Effective Inventory

LM2940IMP-12/NOPB

Effective Inventory6,487

LDO Voltage Regulators 1A LDO REG

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LM2940IMP-12/NOPB DataSheet
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LM2940IMP-12/NOPB Details

The LM2940IMP-12/NOPB is a low dropout voltage regulator from Texas Instruments, designed for reliable power supply in automotive and other battery-operated systems. This device features high PSRR, low dropout voltage, and thermal shutdown protection, making it suitable for various industrial control systems.

Key Features

  • Low Dropout Voltage Regulator: The LM2940IMP-12/NOPB is a low dropout voltage regulator with a fixed output voltage of 12V, suitable for use in automotive and other battery-operated systems.
  • High PSRR: It has high power supply rejection ratio (PSRR) to ensure reliable operation in noisy environments.
  • Thermal Shutdown Protection: The LM2940IMP-12/NOPB features thermal shutdown protection to prevent damage from overheating.

Applications

  • Low Dropout Voltage Regulator for Battery-Powered Applications: Suitable for use in automotive and other battery-operated systems where low dropout voltage is required.
  • Voltage Regulator for Automotive Electronics: Ideal for automotive electronics applications where high PSRR and thermal shutdown protection are critical.
  • Power Supply for Portable Electronic Devices: Used in portable electronic devices such as smartphones, tablets, and laptops.
  • Voltage Regulator for Industrial Control Systems: Suitable for industrial control systems where reliable power supply is essential.

Where to Use

The LM2940IMP-12/NOPB can be used in various applications such as automotive electronics, industrial control systems, and portable electronic devices. It is suitable for use in noisy environments where high PSRR is required.

How to Use

The LM2940IMP-12/NOPB can be used by connecting the input voltage to the VIN pin, the output voltage to the VOUT pin, and the ground to the GND pin. The device should be operated within its specified operating conditions for optimal performance.

Application Circuit

The application circuit diagram for the LM2940IMP-12/NOPB illustrates how to connect the voltage regulator IC to an external power supply and load. It includes connections for input voltage, output voltage, and ground, ensuring proper operation and reliable power supply.

(Tip: For detailed circuit diagram connections and usage guide, refer to the datasheet.)

Complementary

The LM2940IMP-12/NOPB can be complemented by other voltage regulator ICs from Texas Instruments, such as the LM2941 or LM317, which offer similar features and performance.

When selecting complementary transceivers, ensure that their features and specifications align with your specific application requirements for optimal performance and compatibility.

Frequently Asked Questions

Q: What is the fixed output voltage of the LM2940IMP-12/NOPB?

A: The LM2940IMP-12/NOPB has a fixed output voltage of 12V.

Q: Can the LM2940IMP-12/NOPB be used in automotive electronics applications?

A: Yes, the LM2940IMP-12/NOPB is suitable for use in automotive electronics applications where high PSRR and thermal shutdown protection are critical.

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, 8, 9, 10, 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 (%) 2
PSRR at 100 KHz (dB) 48 Dropout voltage (Vdo) (typ) (mV) 500
Operating temperature range (°C) -40 to 125, -40 to 85

Datasheet PDF

Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.

Preliminary Specification LM2940IMP-12/NOPB PDF Download

FAQs

What is LM2940IMP-12/NOPB?

The LM2940IMP-12/NOPB is a low dropout voltage regulator manufactured by Texas Instruments. It is a 12V fixed-output voltage regulator designed to provide a stable power supply for various electronic devices and circuits.

How Does LM2940IMP-12/NOPB Work?

The LM2940IMP-12/NOPB regulates the input voltage to a constant 12V output voltage with a low dropout voltage, meaning it can maintain regulation even when the input voltage is slightly above the desired output voltage. It uses a PNP pass transistor architecture to achieve low dropout voltage and high efficiency.

How Many Pins does LM2940IMP-12/NOPB have and What are the Functions of the Pinout Configuration?

The LM2940IMP-12/NOPB is housed in a 3-pin SOT-223 package. The pinout configuration includes:

  • Input (VIN): Voltage input from the power source.
  • Ground (GND): Ground connection.
  • Output (VOUT): Regulated 12V output.

What are the Pros and Cons of LM2940IMP-12/NOPB?

Pros:

  • Low Dropout Voltage: Provides stable regulation even with small voltage differentials.
  • Fixed Output Voltage: Simplifies circuit design by providing a constant 12V output.
  • Thermal Shutdown Protection: Includes built-in thermal protection to prevent overheating.
  • Short Circuit Protection: Offers protection against output short circuits.
  • Easy-to-Use: Three-pin configuration makes it easy to integrate into circuits.

Cons:

  • Heat Dissipation: May require a heat sink for high current applications to dissipate heat efficiently.
  • Limited Adjustable Output: The output voltage is fixed at 12V and cannot be adjusted.
  • Quiescent Current: Draws a small quiescent current even when not supplying load current.

Are There Any Equivalents/Alternatives to LM2940IMP-12/NOPB for Recommendation?

  • The LM2937 from Texas Instruments is a similar low dropout voltage regulator with different fixed output voltages.
  • Alternatives to the LM2940IMP-12/NOPB include the LT1086 from Linear Technology and the NCP1117 from ON Semiconductor.

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