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 Line Regulation Accuracy Load Regulation Mounting Type Polarity Package Type Quiescent Current Pin Count Reference Voltage Output Type
RS Stock No. 463-583
Mfr. Part No.MC34167TG
HK$35.845
Each (In a Pack of 2)
units
Boost/Buck Controller, Inverting, Non-Inverting 5A Buck Boost Switching 1 4 mV, 10 mV, 15 mV - 1 mV, 4 mV, 30 mV Through Hole - TO-220 - 5 - Fixed
RS Stock No. 102-1335
Mfr. Part No.MC34167TG
HK$30.366
Each (In a Tube of 50)
units
Boost/Buck Controller, Inverting, Non-Inverting 5A Buck Boost Switching 1 4 mV, 10 mV, 15 mV - 1 mV, 4 mV, 30 mV Through Hole - TO-220 - 5 - Fixed
RS Stock No. 786-2417
Mfr. Part No.MC33166TVG
HK$26.50
Each (In a Pack of 2)
units
Boost/Buck Controller, Inverting 3A Buck Boost Switching 1 3 mV, 5 mV, 23 mV - 2 mV, 3 mV, 4 mV Through Hole - TO-220 - 5 - Fixed
RS Stock No. 516-5095
Mfr. Part No.MC34063AP1G
HK$6.74
Each
units
- 1.5A Buck Boost Switching 1 - - - Through Hole - PDIP - 8 - -
RS Stock No. 806-2059
Mfr. Part No.MC33269ST-3.3T3G
HK$7.266
Each (In a Pack of 20)
units
- 800mA Low Dropout Voltage 1 0.3 % ±1% 0.5 % Surface Mount Positive SOT-223 8mA 3+Tab - Fixed
RS Stock No. 145-3061
Mfr. Part No.MC33166TVG
HK$22.376
Each (In a Tube of 50)
units
Boost/Buck Controller, Inverting 3A Buck Boost Switching 1 3 mV, 5 mV, 23 mV - 2 mV, 3 mV, 4 mV Through Hole - TO-220 - 5 - Fixed
RS Stock No. 464-104
Mfr. Part No.LM337TG
HK$5.985
Each (In a Pack of 10)
units
- 1.5A Linear Voltage 1 0.04 %/V - 1 % Through Hole Negative TO-220 - 3 -1.25V Adjustable
RS Stock No. 122-0131
Mfr. Part No.NCP59151MN50TYG
HK$8.232
Each (On a Reel of 4000)
units
- 1.5A Low Dropout Voltage 1 0.5 % ±2% 1 % Surface Mount Positive DFN 80mA 8 - Fixed
RS Stock No. 163-2415
Mfr. Part No.LM337TG
HK$6.29
Each (In a Tube of 50)
units
- 1.5A Linear Voltage 1 0.04 %/V - 1 % Through Hole Negative TO-220 - 3 -1.25V Adjustable
RS Stock No. 769-5790
Mfr. Part No.NCP59151MN50TYG
HK$20.03
Each
units
- 1.5A Low Dropout Voltage 1 0.5 % ±2% 1 % Surface Mount Positive DFN 80mA 8 - Fixed
RS Stock No. 103-2162
Mfr. Part No.MC7805ABD2TG
HK$6.92
Each (In a Tube of 50)
units
- 2.2A Linear Voltage 1 10 mV ±4% 25 mV Surface Mount Positive D2PAK 3.2mA 3 - Fixed
RS Stock No. 124-5349
Mfr. Part No.NCP1117ST50T3G
HK$1.54
Each (On a Reel of 4000)
units
- 2.2A Low Dropout Voltage 1 6 mV ±1% 15 mV Surface Mount Positive SOT-223 10mA 3+Tab - Fixed
RS Stock No. 516-5988
Mfr. Part No.MC7805ABD2TG
HK$8.358
Each (In a Pack of 5)
units
- 2.2A Linear Voltage 1 10 mV ±4% 25 mV Surface Mount Positive D2PAK 3.2mA 3 - Fixed
RS Stock No. 802-2130
Mfr. Part No.NCP1117ST50T3G
HK$3.455
Each (In a Pack of 20)
units
- 1A Low Dropout Voltage 1 6 mV ±1% 15 mV Surface Mount Positive SOT-223 10mA 3+Tab - Fixed
RS Stock No. 162-9096
Mfr. Part No.NCV1117ST18T3G
HK$2.523
Each (On a Reel of 4000)
units
- 2.2A Low Dropout Voltage 1 1 mV ±1% 6 mV Surface Mount Positive SOT-223 10mA 3+Tab - Fixed
RS Stock No. 464-108
Mfr. Part No.LM317MDTG
HK$4.463
Each (In a Pack of 10)
units
- 250mA Linear Voltage 1 0.07 %/V ±4% 1.5 % Surface Mount Positive DPAK - 3 1.3V Adjustable
RS Stock No. 688-9317
Mfr. Part No.MC79L12ACDG
HK$3.605
Each (In a Pack of 2)
units
- 100mA Linear Voltage 1 250 mV - 100 mV Surface Mount Negative SOIC - 8 - Fixed
RS Stock No. 178-4730
Mfr. Part No.MC78M12CTG
HK$4.367
Each (In a Tube of 50)
units
- 700mA Linear Voltage 1 50 mV - 240 mV Through Hole Positive TO-220 - 3 - Fixed
RS Stock No. 805-1740
Mfr. Part No.NCV1117ST18T3G
HK$5.723
Each (In a Pack of 20)
units
- 2.2A Low Dropout Voltage 1 1 mV ±1% 6 mV Surface Mount Positive SOT-223 10mA 3+Tab - Fixed
RS Stock No. 178-4820
Mfr. Part No.MC79L12ACDG
HK$2.749
Each (In a Tube of 98)
units
- 100mA Linear Voltage 1 250 mV - 100 mV Surface Mount Negative SOIC - 8 - Fixed