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. 162-9537
Mfr. Part No.NCP551SN33T1G
SGD0.289
Each (On a Reel of 3000)
units
- 150mA Low Dropout Voltage 1 30 mV 2% 65 mV Surface Mount Positive TSOP 8µA 5 - Fixed
RS Stock No. 102-3490
Mfr. Part No.MC7809CTG
SGD0.716
Each (In a Tube of 50)
units
- 2.2A Linear Voltage 1 32 mV ±4% 35 mV Through Hole Positive TO-220 3.4mA 3 - Fixed
RS Stock No. 533-5632
Mfr. Part No.LM2940T-5.0/NOPB
SGD3.09
Each
units
- 1A Low Dropout Voltage 1 50 mV - 50 mV Through Hole Positive TO-220 - 3 - Fixed
RS Stock No. 145-6669
Mfr. Part No.TPS79501DCQ
SGD4.73
Each (In a Tube of 78)
units
- 500mA Low Dropout Voltage 1 0.05 %/V ±3% 3 mV Surface Mount Positive SOT-223 0.265mA 5+Tab 1.225V Adjustable
RS Stock No. 100-5930
Mfr. Part No.LM1117MP-3.3/NOPB
SGD0.771
Each (On a Reel of 1000)
units
- 800mA Low Dropout Voltage 1 1 mV ±1% 1 mV Surface Mount Positive SOT-223 - 3+Tab - Fixed
RS Stock No. 779-9423
Mfr. Part No.LT1763CS8-5#PBF
SGD8.045
Each (In a Pack of 2)
units
- 500mA Low Dropout Voltage 1 5 mV - 50 mV Surface Mount Positive SOIC 30µA 8 - Fixed
RS Stock No. 296-756
Mfr. Part No.L7805CP
SGD1.92
Each
units
- 1.5A Linear Voltage 1 100 mV - 100 mV Through Hole Positive TO-220FP 8mA 3 - Fixed
RS Stock No. 168-6063
Mfr. Part No.L7812ACV
SGD0.788
Each (In a Tube of 50)
units
- 1A Linear Voltage 1 120 mV 2% 100 mV Through Hole Positive TO-220 4.4mA 3 - Fixed
RS Stock No. 100-3962
Mfr. Part No.LM2940T-5.0/NOPB
SGD2.174
Each (In a Tube of 45)
units
- 1A Low Dropout Voltage 1 50 mV - 50 mV Through Hole Positive TO-220 - 3 - Fixed
RS Stock No. 168-6612
Mfr. Part No.L7805ABV
SGD0.635
Each (In a Tube of 50)
units
- 1A Linear Voltage 1 50 mV 2% 100 mV Through Hole Positive TO-220 4.3mA 3 - Fixed
RS Stock No. 189-1302
Mfr. Part No.L78L12ACZ
SGD0.56
Each
units
- 100mA Linear Voltage 1 250 mV ±5% 100 mV Through Hole Positive TO-92 6.5mA 3 - Fixed
RS Stock No. 102-5765
Mfr. Part No.LP38691DT-3.3/NOPB
SGD2.469
Each (In a Tube of 75)
units
- 500mA Low Dropout Voltage 1 0.03 %/V ±2% 1.8 %/A Surface Mount Positive TO-252 - 3 - Fixed
RS Stock No. 620-1861
Mfr. Part No.TPS79501DCQ
SGD5.27
Each (In a Pack of 5)
units
- 500mA Low Dropout Voltage 1 0.05 %/V ±3% 3 mV Surface Mount Positive SOT-223 0.265mA 5+Tab 1.225V Adjustable
RS Stock No. 828-7404
Mfr. Part No.AP2204K-ADJTRG1
SGD0.502
Each (In a Pack of 50)
units
- 150mA Low Dropout Voltage 1 0.05 % - 0.5 % Surface Mount Positive SOT-23 50µA 5 1.24V Adjustable
RS Stock No. 889-5402
Mfr. Part No.MCP1701AT-3302I/CB
BrandMicrochip
SGD0.995
Each (On a Reel of 3000)
units
- 150mA Low Dropout Voltage 1 0.3 %/V ±2% 2.72 % Surface Mount Positive SOT-23A 0.002mA 3 - Fixed
RS Stock No. 686-9653
Mfr. Part No.L78L12ACZ-AP
SGD0.469
Each (In a Pack of 50)
units
- 100mA Linear Voltage 1 250 mV ±5% 100 mV Through Hole Positive TO-92 6.5mA 3 - Fixed
RS Stock No. 102-3501
Mfr. Part No.MC78L05ACPG
SGD0.201
Each (In a Bag of 2000)
units
- 100mA Linear Voltage 1 150 mV - 60 mV Through Hole Positive TO-92 - 3 - Fixed
RS Stock No. 121-8741
Mfr. Part No.LM1085IT-12/NOPB
SGD2.688
Each (In a Tube of 45)
units
- 3A Low Dropout Voltage 1 25 mV - 36 mV Through Hole Positive TO-220 - 3 - Fixed
RS Stock No. 922-8285
Mfr. Part No.AP1117E33G-13
SGD0.194
Each (On a Reel of 2500)
units
- 1A Linear Voltage 1 0.2 % - 33 mV Surface Mount Positive SOT-223 10mA 3+Tab - Fixed
RS Stock No. 100-0719
Mfr. Part No.LM338T/NOPB
SGD2.94
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