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. 858-0835
Mfr. Part No.LT1084CT#PBF
HK$104.94
Each
units
- 5A Low Noise LDO 1 1.25 → 25 V 0.015 % - 0.1 % Through Hole Positive TO-220 - 3 -
RS Stock No. 533-9577
Mfr. Part No.LM1117MP-3.3/NOPB
HK$12.92
Each
units
- 800mA Low Dropout Voltage 1 - 1 mV ±1% 1 mV Surface Mount - SOT-223 - 4 -
RS Stock No. 100-5930
Mfr. Part No.LM1117MP-3.3/NOPB
HK$8.449
Each (On a Reel of 1000)
units
- 800mA Low Dropout Voltage 1 - 1 mV ±1% 1 mV Surface Mount Positive SOT-223 - 3+Tab -
RS Stock No. 884-2552
Mfr. Part No.LT1033CT#PBF
HK$87.865
Each (In a Pack of 2)
units
- 3A Linear Voltage 1 - 0.05 %/V ±1% 1.5 % Through Hole Negative TO-220 - 3 -1.25V
RS Stock No. 779-9628
Mfr. Part No.LT317AT#PBF
HK$69.125
Each (In a Pack of 2)
units
- 1.5A Linear Voltage 1 - 0.02 %/V - 0.5 % Through Hole Positive TO-220 - 3 1.25V
RS Stock No. 742-7691
Mfr. Part No.ADP150AUJZ-3.3-R7
HK$11.558
Each (In a Pack of 5)
units
- 150mA Low Dropout Voltage 1 - 0.05 %/V -2.5 → 1.5% 0.008 %/mA Surface Mount Positive TSOT 0.01mA 5 -
RS Stock No. 912-9589
Mfr. Part No.ADP150AUJZ-3.3-R7
HK$5.428
Each (On a Reel of 3000)
units
- 150mA Linear Voltage 1 - 0.05 %/V -2.5 → 1.5% 0.008 %/mA Surface Mount Positive TSOT 0.01mA 5 -
RS Stock No. 545-4884
Mfr. Part No.LT1085CT#PBF
HK$87.54
Each
units
- 3A Low Dropout Voltage 1 - 0.2 % - 0.3 % Through Hole Positive TO-220 - 3 1.262V
RS Stock No. 779-9038
Mfr. Part No.LT1084IT#PBF
HK$118.39
Each
units
- 5A Low Dropout Voltage 1 - 0.5 % - 0.4 % Through Hole Positive TO-220 10mA 3 1.25V
RS Stock No. 779-9619
Mfr. Part No.LT337AT#PBF
HK$68.755
Each (In a Pack of 2)
units
- 1.5A Linear Voltage 1 - 0.03 %/V - 1 % Through Hole Negative TO-220 - 3 -1.25V
RS Stock No. 460-900
Mfr. Part No.LM338T/NOPB
HK$24.732
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. 168-6809
Mfr. Part No.LM317T
HK$5.487
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
HK$5.487
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. 100-0719
Mfr. Part No.LM338T/NOPB
HK$21.004
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. 162-4712
Mfr. Part No.LM2936Z-3.3/NOPB
HK$8.055
Each (In a Box of 1800)
units
- 50mA Low Dropout Voltage 1 - 30 mV ±2% 30 mV Through Hole Positive TO-92 - 3 -
RS Stock No. 298-8621
Mfr. Part No.L7915CV
HK$7.07
Each
units
- 1.5A Linear Voltage 1 - 300 mV - 300 mV Through Hole Negative TO-220 3mA 3 -
RS Stock No. 162-6327
Mfr. Part No.LP2998MR/NOPB
HK$19.281
Each (In a Tube of 95)
units
- 1.5A Linear Voltage 1 - - - - Surface Mount - PSOP - 8 -
RS Stock No. 298-8558
Mfr. Part No.L7815CV
HK$6.76
Each
units
- 1.5A Linear Voltage 1 - 300 mV - 300 mV Through Hole Positive TO-220 8mA 3 -
RS Stock No. 463-583
Mfr. Part No.MC34167TG
Brandonsemi
HK$41.10
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 -
RS Stock No. 168-6061
Mfr. Part No.L7815CV
HK$5.369
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 -