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Voltage regulators are ICs used to generate a stable and consistent voltage within a circuit. They take an input voltage and convert this into a fixed output voltage. Even if the input voltage changes, the regulator will continue to provide the same output. The voltage regulator will take the output voltage and compare it to a reference voltage. It will then adjust the pass device to help manage the output voltage. This helps to regulate the voltage throughout a circuit design, dependant on where the voltage regulator(s) are.

Voltage regulators are essential in electronic circuits that include components that require a particular voltage input. For example, a processor. The input voltage, output voltage and output current are all important things to consider when choosing a voltage regulator IC.

Voltage regulators cannot convert the voltage from AC to DC, for example. If you require voltage conversion to run in parallel to your voltage regulator, please see our range of Digital to Analogue Converters (DACs) or Analogue to Digital Converters (ADCs).

### Types of voltage regulator
- Buck-Boost Switching Regulator
- Charge Pump
- Linear Voltage Regulator
- LDO (Low Dropout) Voltage Regulator

### Where are voltage regulators used?

Voltage regulators are found in most electronics circuits that require voltage management or voltage regulation. This includes chargers, power supply units (PSUs), telecommunications and automotive applications.



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Voltage Regulators | Adjustable & Linear | RS

Voltage Regulators

Texas Instruments LM317KTTR Voltage Regulator 1.5A D2PAK (TO-263)

Texas Instruments UA78L08ACLPRE3 Voltage Regulator 100mA TO-92

Texas Instruments LM1086IS-ADJ/NOPB Voltage Regulator 1.5A 3-Pin,...

Texas Instruments LM1085IS-ADJ/NOPB Voltage Regulator 3A 3-Pin,...

Texas Instruments LP38690DT-5.0/NOPB Voltage Regulator 1A TO-252

Texas Instruments LM2990S-5.0/NOPB Voltage Regulator 1A D2PAK (TO-263)

Texas Instruments TLV1117-50CDCY Voltage Regulator 800mA SOT-223

Texas Instruments LM2940IMP-5.0/NOPB Voltage Regulator 1A SOT-223

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Linear Voltage Regulators | RS

<p>A Linear Voltage Regulator ensures the output voltage from the circuit is maintained at a specific voltage. The device acts as a variable resistor, continuously adjusting to maintain a constant output voltage. The regulated voltage must be lower than the input voltage. Linear voltage regulators are step-down converters which means that the output voltage is lower that the input. Simple voltage regulator contains a Zener Diode and a resistor but more complicated versions include elements like a voltage reference and error amplifiers.</p><p>A more specific type of regulator are Low Dropout Voltage Regulators (LDO) which can regulate voltage even when the power supply voltage is very close to the supply voltage. They have low noise and good ripple rejection making them crucial to maintaining a stable power supply in any power-management system.</p>

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Analog Devices Voltage Regulators | RS

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Infineon Voltage Regulators | RS

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Texas Instruments Voltage Regulators

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