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. 918-1971
Mfr. Part No.L7805CV
$1.029
Each (In a Tube of 50)
units
- 1.5A Linear Voltage 1 100 mV - 100 mV Through Hole Positive TO-220 8mA 3 - Fixed
RS Stock No. 714-0792
Mfr. Part No.LM317T
$1.282
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 Adjustable
RS Stock No. 168-6809
Mfr. Part No.LM317T
$0.932
Each (In a Tube of 50)
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 Adjustable
RS Stock No. 460-900
Mfr. Part No.LM338T/NOPB
$4.492
Each (In a Pack of 5)
units
- 5A Linear Voltage 1 0.03 %/V - 0.5 % Through Hole Positive TO-220 - 3 1.29V Adjustable
RS Stock No. 100-0719
Mfr. Part No.LM338T/NOPB
$3.146
Each (In a Tube of 45)
units
- 5A Linear Voltage 1 0.03 %/V - 0.5 % Through Hole Positive TO-220 - 3 1.29V Adjustable
RS Stock No. 102-3529
Mfr. Part No.L78L05ACZTR
$0.159
Each (On a Reel of 2000)
units
- 100mA Linear Voltage 1 150 mV ±5% 60 mV Through Hole Positive TO-92 6mA 3 - Fixed
RS Stock No. 714-7768
Mfr. Part No.L78L05ACZTR
$0.863
Each (In a Pack of 25)
units
- 100mA Linear Voltage 1 150 mV ±5% 60 mV Through Hole Positive TO-92 6mA 3 - Fixed
RS Stock No. 165-8693
Mfr. Part No.AP2204K-5.0TRG1
$0.18
Each (On a Reel of 3000)
units
- 200mA Low Dropout Voltage 1 0.05 % - 0.5 % Surface Mount Positive SOT-23 - 5 1.24V Fixed
RS Stock No. 885-0721
Mfr. Part No.HT7533-1-SOT89
BrandHoltek
$0.862
Each (In a Pack of 20)
units
- 100mA Low Dropout Voltage 1 0.2 %/V ±3% 60 mV Surface Mount Positive SOT-89 4µA 3 - Fixed
RS Stock No. 189-1295
Mfr. Part No.L78L05ACZ
$0.76
Each
units
- 100mA Linear Voltage 1 150 mV ±5% 60 mV Through Hole Positive TO-92 6mA 3 - Fixed
RS Stock No. 885-5404
Mfr. Part No.AP2204K-5.0TRG1
$0.546
Each (In a Pack of 40)
units
- 200mA Low Dropout Voltage 1 0.05 % - 0.5 % Surface Mount Positive SOT-23 - 5 1.24V Fixed
RS Stock No. 661-3621
Mfr. Part No.LM317KTTR
$1.292
Each (In a Pack of 5)
units
- 1.5A Linear Voltage 1 0.04 %/V - 0.5 % Surface Mount Positive D2PAK (TO-263) - 3 1.3V Adjustable
New
RS Stock No. 922-3375
Mfr. Part No.LM317KTTR
$0.655
Each (On a Reel of 500)
units
- - - - - - - - - - - - - -
RS Stock No. 168-6049
Mfr. Part No.L78L05ACZ
$0.16
Each (In a Bag of 2500)
units
- 100mA Linear Voltage 1 150 mV ±5% 60 mV Through Hole Positive TO-92 6mA 3 - Fixed
RS Stock No. 170-9148
Mfr. Part No.HT7533-1-SOT89
BrandHoltek
$0.739
Each (On a Reel of 1000)
units
- 100mA Low Dropout Voltage 1 0.2 %/V ±3% 60 mV Surface Mount Positive SOT-89 4µA 3 - Fixed
RS Stock No. 545-5584
Mfr. Part No.LT1129CT#PBF
$9.76
Each
units
- 700mA Low Dropout Voltage 1 10 mV - 20 mV Through Hole Positive TO-220 0.05mA 5 3.75V Adjustable
RS Stock No. 533-5711
Mfr. Part No.LM317LZ/NOPB
$1.33
Each
units
- 100mA Linear Voltage 1 0.04 %/V - 0.5 % Through Hole Positive TO-92 - 3 1.3V Adjustable
RS Stock No. 100-3967
Mfr. Part No.LM317LZ/NOPB
$0.445
Each (On a Reel of 1800)
units
- 100mA Linear Voltage 1 0.04 %/V - 0.5 % Through Hole Positive TO-92 - 3 1.3V Adjustable
RS Stock No. 516-5865
Mfr. Part No.NCP1117DT33G
$0.84
Each (In a Pack of 5)
units
- 1A Low Dropout Voltage 1 0.8 mV ±1% 4.3 mV Surface Mount Positive DPAK 3.6mA 3 - Fixed
RS Stock No. 102-3504
Mfr. Part No.NCP1117DT33G
$0.67
Each (In a Tube of 75)
units
- 1A Low Dropout Voltage 1 0.8 mV ±1% 4.3 mV Surface Mount Positive DPAK 3.6mA 3 - Fixed