Voltage Regulators

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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Description Price Regulator Function Maximum Output Current Regulator Type Number of Outputs Output Voltage Line Regulation Accuracy Load Regulation Mounting Type Polarity Package Type Quiescent Current Pin Count Reference Voltage
RS Stock No. 168-6809
Mfr. Part No.LM317T
£0.469
Each (In a Tube of 50)
Units
- 1.5A Linear Voltage 1 1.2 → 37 V 0.04 %/V - 0.5 %, 0.5 %Vo, 25 mV%/Vo Through Hole Positive TO-220 - 3 1.25V
RS Stock No. 714-0792
Mfr. Part No.LM317T
£0.468
Each (In a Pack of 10)
Units
- 1.5A Linear Voltage 1 - 0.04 %/V - 0.5 %, 0.5 %Vo, 25 mV%/Vo Through Hole Positive TO-220 - 3 1.25V
RS Stock No. 918-1971
Mfr. Part No.L7805CV
£0.418
Each (In a Tube of 50)
Units
- 1.5A Linear Voltage 1 - 100 mV - 100 mV Through Hole Positive TO-220 8mA 3 -
RS Stock No. 460-900
Mfr. Part No.LM338T/NOPB
£1.926
Each (In a Pack of 5)
Units
- 5A Linear Voltage 1 - 0.03 %/V - 0.5 % Through Hole Positive TO-220 - 3 1.29V
RS Stock No. 100-0719
Mfr. Part No.LM338T/NOPB
£1.627
Each (In a Tube of 45)
Units
- 5A Linear Voltage 1 - 0.03 %/V - 0.5 % Through Hole Positive TO-220 - 3 1.29V
RS Stock No. 168-6059
Mfr. Part No.L7805ACV
£0.501
Each (In a Tube of 50)
Units
- 1A Linear Voltage 1 5 V 50 mV 2% 100 mV Through Hole Positive TO-220 4.3mA 3 -
RS Stock No. 298-8508
Mfr. Part No.L7805ACV
£0.62
Each
Units
- 1A Linear Voltage 1 - 50 mV 2% 100 mV Through Hole Positive TO-220 4.3mA 3 -
RS Stock No. 714-7768
Mfr. Part No.L78L05ACZTR
£0.293
Each (In a Pack of 25)
Units
- 100mA Linear Voltage 1 - 150 mV ±5% 60 mV Through Hole Positive TO-92 6mA 3 -
RS Stock No. 102-3529
Mfr. Part No.L78L05ACZTR
£0.102
Each (On a Reel of 2000)
Units
- 100mA Linear Voltage 1 - 150 mV ±5% 60 mV Through Hole Positive TO-92 6mA 3 -
RS Stock No. 189-1295
Mfr. Part No.L78L05ACZ
£0.36
Each
Units
- 100mA Linear Voltage 1 - 150 mV ±5% 60 mV Through Hole Positive TO-92 6mA 3 -
RS Stock No. 168-6049
Mfr. Part No.L78L05ACZ
£0.112
Each (In a Bag of 2500)
Units
- 100mA Linear Voltage 1 5 V 150 mV ±5% 60 mV Through Hole Positive TO-92 6mA 3 -
RS Stock No. 714-0666
Mfr. Part No.L7809CV
£0.417
Each (In a Pack of 10)
Units
- 1.5A Linear Voltage 1 - 180 mV 2% 180 mV Through Hole Positive TO-220 8mA 3 -
RS Stock No. 168-6797
Mfr. Part No.L7809CV
£0.417
Each (In a Tube of 50)
Units
- 1.5A Linear Voltage 1 9 V 180 mV 2% 180 mV Through Hole Positive TO-220 8mA 3 -
RS Stock No. 124-1691
Mfr. Part No.LM350T
Brandonsemi
£0.872
Each (In a Tube of 50)
Units
- 3A Linear Voltage 1 1.2 → 33 V 0.03 %/V - 0.5 % Through Hole Positive TO-220AB - 3 1.3V
RS Stock No. 168-6061
Mfr. Part No.L7815CV
£0.418
Each (In a Tube of 50)
Units
- 1.5A Linear Voltage 1 15 V 300 mV - 300 mV Through Hole Positive TO-220 8mA 3 -
RS Stock No. 298-8558
Mfr. Part No.L7815CV
£0.53
Each
Units
- 1.5A Linear Voltage 1 - 300 mV - 300 mV Through Hole Positive TO-220 8mA 3 -
RS Stock No. 533-8209
Mfr. Part No.LM317T/NOPB
£1.82
Each
Units
- 1.5A Linear Voltage 1 - 0.04 %/V - 0.5 % Through Hole Positive TO-220 - 3 1.25V
RS Stock No. 100-5905
Mfr. Part No.LM317T/NOPB
£1.564
Each (In a Tube of 45)
Units
- 1.5A Linear Voltage 1 - 0.04 %/V - 0.5 % Through Hole Positive TO-220 - 3 1.25V
RS Stock No. 714-7780
Mfr. Part No.L78S05CV
£0.652
Each (In a Pack of 10)
Units
- 2A Linear Voltage 1 - 100 mV - 100 mV Through Hole Positive TO-220 8mA 3 -
RS Stock No. 102-3530
Mfr. Part No.L78S05CV
£0.618
Each (In a Tube of 50)
Units
- 2A Linear Voltage 1 - 100 mV - 100 mV Through Hole Positive TO-220 8mA 3 -