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. 163-2415
Mfr. Part No.LM337TG
HK$6.50
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. 124-5349
Mfr. Part No.NCP1117ST50T3G
HK$1.649
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. 779-8981
Mfr. Part No.LT1070CT#PBF
HK$118.07
Each
units
Boost/Buck Controller, Cuk, Flyback, Forward, Inverting 5A Buck Boost Switching 1 0.03 %/V - - Through Hole - TO-220 - 5 - -
RS Stock No. 146-0950
Mfr. Part No.AZ1117H-3.3TRE1
HK$0.957
Each (On a Reel of 4000)
units
- 1A Low Dropout Voltage 1 6 mV 1% 10 mV Surface Mount Positive SOT-223 10mA 3+Tab - Fixed
RS Stock No. 298-8564
Mfr. Part No.L7824CV
HK$3.10
Each
units
- 1.5A Linear Voltage 1 480 mV - 480 mV Through Hole Positive TO-220 8mA 3 - Fixed
RS Stock No. 121-9159
Mfr. Part No.LM317DCY
HK$5.975
Each (In a Tube of 80)
units
- 1.5A Linear Voltage 1 0.04 %/V - 0.5 % Surface Mount Positive SOT-223 - 3+Tab 1.3V Adjustable
RS Stock No. 163-2480
Mfr. Part No.MC7812CDTRKG
HK$2.184
Each (On a Reel of 2500)
units
- 1A Linear Voltage 1 48 mV ±4% 60 mV Surface Mount Positive DPAK 3.4mA 3 - Fixed
RS Stock No. 173-2290
Mfr. Part No.NJM2370U1-33
HK$3.80
Each (On a Reel of 2000)
units
- 180mA Low Dropout Voltage 1 0.12 %/V 3% 0.03 %/mA Surface Mount Positive SOT-89 0.18mA 6 - Fixed
RS Stock No. 102-5754
Mfr. Part No.LM78L12ACM/NOPB
HK$6.499
Each (In a Tube of 95)
units
- 100mA Linear Voltage 1 180 mV ±5% 100 mV Surface Mount Positive SOIC 3mA 8 - Fixed
RS Stock No. 821-3320
Mfr. Part No.NCP692MN33T2G
HK$8.883
Each (In a Pack of 10)
units
- 1A Low Dropout Voltage 1 8 mV ±2% 40 mV Surface Mount Positive DFN - 6 - Fixed
RS Stock No. 669-5207
Mfr. Part No.TC1014-2.5VCT713
BrandMicrochip
HK$3.14
Each (In a Pack of 10)
units
- 50mA Low Dropout Voltage 1 0.05 % ±2.5% 0.5 % Surface Mount Positive SOT-23 <0.0005mA 5 - Fixed
RS Stock No. 122-3375
Mfr. Part No.AS78L05MTR-G1
HK$0.836
Each (On a Reel of 4000)
units
- 100mA Linear Voltage 1 150 mV ±5% 60 mV Surface Mount Positive SOIC 5.5mA 8 - Fixed
RS Stock No. 805-1740
Mfr. Part No.NCV1117ST18T3G
HK$6.059
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. 545-5720
Mfr. Part No.LT1085CT-5#PBF
HK$76.92
Each
units
- 3A Low Dropout Voltage 1 0.015 % ±1% 0.1 % Through Hole Positive TO-220 5mA 3 - Fixed
RS Stock No. 536-1401
Mfr. Part No.LM78L12ACM/NOPB
HK$8.00
Each
units
- 100mA Linear Voltage 1 180 mV ±5% 100 mV Surface Mount Positive SOIC 3mA 8 - Fixed
RS Stock No. 533-5648
Mfr. Part No.LM2941CT/NOPB
HK$15.10
Each
units
- 1A Low Dropout Voltage 1 10 mV/V - 10 mV/V Through Hole Positive TO-220 - 5 1.313V Adjustable
RS Stock No. 661-6128
Mfr. Part No.LM317DCY
HK$7.074
Each (In a Pack of 5)
units
- 1.5A Linear Voltage 1 0.04 %/V - 0.5 % Surface Mount Positive SOT-223 - 3+Tab 1.3V Adjustable
RS Stock No. 102-9429
Mfr. Part No.L7805CV-DG
HK$4.773
Each (In a Tube of 50)
units
- 1.5A Linear Voltage 1 50 mV - 100 mV Through Hole - TO-220 6mA 3 - Fixed
RS Stock No. 145-2789
Mfr. Part No.MC7815BTG
HK$5.492
Each (In a Tube of 50)
units
- 1A Linear Voltage 1 300 mV ±4% 300 mV Through Hole Positive TO-220 3.5mA 3 - Fixed
RS Stock No. 178-4730
Mfr. Part No.MC78M12CTG
HK$4.746
Each (In a Tube of 50)
units
- 700mA Linear Voltage 1 50 mV - 240 mV Through Hole Positive TO-220 - 3 - Fixed