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Voltage Regulators - Linear Regulator Controllers

Linear regulator controllers are crucial integrated circuits (ICs) that offer a regulated DC output voltage from a higher DC input voltage. They are the essential components used in many electronic devices to ensure stable and reliable power for sensitive circuitry.

How Do Voltage Regulators - Linear Regulator Controllers Operate?

Linear regulators work by scattering excess power as heat to upkeep a continuous output voltage. They serve as variable resistors, managing their resistance to control voltage drop across them. This is obtained through a control loop that constantly observes the output voltage and manages the resistance accordingly.   

What are the Key Components of a Linear Regulator Controller?

  • Voltage Reference: A steady voltage source is employed as a reference for the output voltage.   
  • Error Amplifier: Compares the output voltage to the reference voltage and amplifies the difference. 
  • Pass Transistor: A transistor that serves as the variable resistor, regulating the current flow to the output. 
  • Feedback Network: Samples the output voltage and feeds it back to the error amplifier.   

What Types of Voltage Regulators - Linear Regulator Controllers are Available?

  • Standard Linear Regulators: The most common type of linear regulator, providing either a fixed or adjustable output voltage.
  • Low-Dropout (LDO) Regulators: Designed to work with a slight variation between the input and output voltage, making them more efficient in specific applications.   

What Benefits Do They Offer?

  • Relatively simple to design and implement.
  • They produce very little noise output, making them perfect for noise-sensitive applications.   
  • They are often less expensive compared to switching regulators.   

Where Can Voltage Regulators - Linear Regulator Controllers Be Used?

Linear regulators can be found in a wide variety of applications across different industries, such as:

  • Microprocessor Power Supplies: Offering stable power to microprocessors and other digital circuits.   
  • Battery-Powered Components: Managing the voltage from batteries to confirm consistent performance.
  • Audio Equipment: Providing low-noise power to audio amplifiers and other delicate circuits.

Summary

Linear regulator controllers are simple, low-noise, and cost-effective devices, which makes them a compelling option where these attributes outweigh the thermal considerations. The ongoing development of low-dropout (LDO) regulators further extends their applicability by minimising power loss and enabling operation with smaller input-output voltage differentials. Thus, rather than viewing linear regulators as outdated, it's more accurate to recognise them as specialised tools ideally suited for specific tasks within the broader landscape of power electronics.


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Analog Devices Inc.
LT1575CN8-2.8#PBF, Analog Devices Inc.
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£ 3.50
Analog Devices Inc.
LT1573IS8#PBF, Analog Devices Inc.
169 In Stock
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LT1123CZ#PBF, Analog Devices Inc.
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Texas Instruments
UC2834QTR, Texas Instruments
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Analog Devices Inc.
LT1573CS8-2.5#PBF, Analog Devices Inc.
39 In Stock
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Micrel Inc.
MIC5320-LLYMT, Micrel Inc.
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666 +
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L78M05TL-E-SY, Sanyo
5821 In Stock
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SPX29500U-5-0, Sipex
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Analog Devices Inc./Maxim Integrated
MAX8737ETE+, Analog Devices Inc./Maxim Integrated
11014 In Stock
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Shenzhen Slkormicro Semicon Co., Ltd.
AMS1117-3.3 SOT-89, Shenzhen Slkormicro Semicon Co., Ltd.
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SPX2810AU-L-3-3, Sipex
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Micrel Inc.
MIC5210-28BMM, Micrel Inc.
1398 In Stock
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£ 0.38
L78LR05C-MA-E, onsemi
37193 In Stock
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L78LR05E-FA-E, Sanyo
498 In Stock
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Shenzhen Slkormicro Semicon Co., Ltd.
AMS1117-5.0 SOT-223, Shenzhen Slkormicro Semicon Co., Ltd.
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Richtek USA Inc.
RT9174GS, Richtek USA Inc.
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LFC789D25CPW, Texas Instruments
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National Semiconductor
L1087MPX-3.3/NOPB, National Semiconductor
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SPX2951CS-L-3-3, Sipex
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RT9008GE, Richtek USA Inc.
8546 In Stock
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Analog Devices Inc.
LT3150CGN#PBF, Analog Devices Inc.
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SPX431BM1-L/TR, Sipex
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L79M05TLL-SONY-TL-E, Sanyo
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Micrel Inc.
MIC5210-30BMM, Micrel Inc.
938 In Stock
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SPX2815T-L-2-5, Sipex
4800 In Stock
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