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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Texas Instruments LM350AT/NOPB, 1 Linear Voltage, Voltage Regulator 3A, 1.2 → 33 V 3-Pin, TO-220 RS Stock No.: 533-5840 Mfr. Part No.: LM350AT/NOPB Datasheets: £2.61 Each	Texas Instruments	-	-	3A	Linear Voltage	1	1.2 → 33 V	0.01 %/V	±1%	0.3 %	Through Hole	Positive	TO-220	-	3	1.262V	Adjustable	25W	-	-	10.16 x 4.7 x 8.89mm	8.89mm	35 V	+125 °C	4.2 V	-40 °C
Texas Instruments LM1085IT-12/NOPB, 1 Low Dropout Voltage, Voltage Regulator 3A, 12 V 3-Pin, TO-220 RS Stock No.: 533-9381 Mfr. Part No.: LM1085IT-12/NOPB Datasheets: £1.29 Each	Texas Instruments	-	-	3A	Low Dropout Voltage	1	12 V	25 mV	-	36 mV	Through Hole	Positive	TO-220	-	3	-	Fixed	-	-	-	10.16 x 4.7 x 8.89mm	8.89mm	18 V	+125 °C	2.6 V	-40 °C
STMicroelectronics L78S09CV, 1 Linear Voltage, Voltage Regulator 2A, 9 V 3-Pin, TO-220 RS Stock No.: 686-9751 Mfr. Part No.: L78S09CV Datasheets: £0.33 Each (In a Pack of 10)	STMicroelectronics	-	-	2A	Linear Voltage	1	9 V	130 mV	-	170 mV	Through Hole	Positive	TO-220	8mA	3	-	Fixed	-	-	-	10.4 x 4.6 x 9.15mm	9.15mm	35 V	+150 °C	12 V	0 °C
Texas Instruments LM1084IT-ADJ/NOPB, 1 Low Dropout Voltage, Voltage Regulator 5A, 1.2 → 15 V 3-Pin, TO-220 RS Stock No.: 533-9347 Mfr. Part No.: LM1084IT-ADJ/NOPB Datasheets: £1.87 Each	Texas Instruments	-	-	5A	Low Dropout Voltage	1	1.2 → 15 V	0.2 %	-	0.3 %	Through Hole	Positive	TO-220	-	3	1.262V	Adjustable	-	-	-	10.16 x 4.7 x 8.89mm	8.89mm	29 V	+125 °C	2.6 V	-40 °C
STMicroelectronics L7805CV-DG, 1 Linear Voltage, Voltage Regulator 1.5A, 5 V 3-Pin, TO-220 RS Stock No.: 793-1346 Mfr. Part No.: L7805CV-DG Datasheets: £0.36 Each (In a Pack of 10)	STMicroelectronics	-	-	1.5A	Linear Voltage	1	5 V	50 mV	-	100 mV	Through Hole	-	TO-220	6mA	3	-	Fixed	-	-	-	10.4 x 4.6 x 15.75mm	15.75mm	35 V	+125 °C	-	0 °C
United Automation CSR2-10E Linear Voltage, Voltage Regulator 10A, 230 V 3-Pin RS Stock No.: 655-638 Mfr. Part No.: CSR2-10E Datasheets: £47.68 Each	United Automation	-	-	10A	Linear Voltage	-	230 V	-	-	-	Panel Mount	-	-	-	3	-	Adjustable	-	-	-	43 x 36 x 42.5mm	42.5mm	230 V	+75 °C	-	0 °C
Microchip MCP1703AT-3302E/DB, 1 Low Dropout Voltage, Voltage Regulator 250mA, 3.3 V RS Stock No.: 238-0646 Mfr. Part No.: MCP1703AT-3302E/DB Datasheets: £0.42 Each (In a Pack of 10)	Microchip	-	LDO	250mA	Low Dropout Voltage	1	3.3 V	±0.1 %/V	-	±1 %	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Microchip MCP1703AT-5002E/CB, 1 Low Dropout Voltage, Voltage Regulator 250mA, 5 V 3-Pin, SOT-23A RS Stock No.: 770-9511 Mfr. Part No.: MCP1703AT-5002E/CB Datasheets: £0.592 Each (In a Pack of 10)	Microchip	-	-	250mA	Low Dropout Voltage	1	5 V	0.3 %/V	2%	2.5 %	Surface Mount	Positive	SOT-23A	5µA	3	-	Fixed	-	-	-	3.1 x 1.8 x 1.3mm	1.3mm	16 V	+125 °C	2.7 V	-40 °C
onsemi NCP114ASN330T1G, 1 Low Dropout Voltage, Voltage Regulator 600mA, 3.3 V 5-Pin, TSOP RS Stock No.: 126-3178 Mfr. Part No.: NCP114ASN330T1G Datasheets: £0.133 Each (In a Pack of 50)	onsemi	-	-	600mA	Low Dropout Voltage	1	3.3 V	0.1 %/V	±2%	45 mV	Surface Mount	Positive	TSOP	95µA	5	-	Fixed	-	-	-	3.15 x 1.65 x 1mm	1mm	5.5 V	+150 °C	1.7 V	-
Texas Instruments LM338T/NOPB, 1 Linear Voltage, Voltage Regulator 5A, 1.2 → 32 V 3-Pin, TO-220 RS Stock No.: 460-900 Mfr. Part No.: LM338T/NOPB Datasheets: £1.67 Each (In a Pack of 5)	Texas Instruments	-	-	5A	Linear Voltage	1	1.2 → 32 V	0.03 %/V	-	0.5 %	Through Hole	Positive	TO-220	-	3	1.29V	Adjustable	25W	-	-	10.16 x 4.7 x 8.89mm	8.89mm	40 V	+125 °C	4.2 V	0 °C
STMicroelectronics L7812ACV, 1 Linear Voltage, Voltage Regulator 1A, 12 V 3-Pin, TO-220 RS Stock No.: 298-8586 Mfr. Part No.: L7812ACV Datasheets: £0.45 Each	STMicroelectronics	-	-	1A	Linear Voltage	1	12 V	120 mV	2%	100 mV	Through Hole	Positive	TO-220	4.4mA	3	-	Fixed	-	-	-	10.4 x 4.6 x 9.15mm	9.15mm	35 V	+150 °C	-	0 °C
Microchip MIC5233YM5-TR, 1 Low Dropout Voltage, Voltage Regulator 100mA, 1.24 → 20 V 5-Pin, SOT-23 RS Stock No.: 910-1626P Mfr. Part No.: MIC5233YM5-TR Datasheets: £0.802 Each (Supplied on a Reel)	Microchip	-	-	100mA	Low Dropout Voltage	1	1.24 → 20 V	0.5 %	±2%	1 %	Surface Mount	Positive	SOT-23	-	5	1.24V	Adjustable	-	-	-	2.9 x 1.6 x 1.3mm	1.3mm	36 V	+125 °C	2.3 V	-40 °C
STMicroelectronics LD1117S33TR, 1 Low Dropout Voltage, Voltage Regulator 1.3A, 3.3 V 3+Tab-Pin, SOT-223 RS Stock No.: 714-0697 Mfr. Part No.: LD1117S33TR Datasheets: £0.167 Each (In a Pack of 10)	STMicroelectronics	-	-	1.3A	Low Dropout Voltage	1	3.3 V	6 mV	±1%	10 mV	Surface Mount	Positive	SOT-223	5mA	3+Tab	-	Fixed	-	-	-	6.5 x 3.5 x 1.8mm	1.8mm	15 V	+150 °C	-	0 °C
STMicroelectronics L78S75CV, 1 Linear Voltage, Voltage Regulator 2A, 7.5 V 3-Pin, TO-220 RS Stock No.: 686-9026 Mfr. Part No.: L78S75CV Datasheets: £0.212 Each (In a Pack of 10)	STMicroelectronics	-	-	2A	Linear Voltage	1	7.5 V	120 mV	-	140 mV	Through Hole	Positive	TO-220	8mA	3	-	Fixed	-	-	-	10.4 x 4.6 x 9.15mm	9.15mm	35 V	+150 °C	10.5 V	0 °C
onsemi MC34063AP1G, 1 Buck Boost Switching, Buck Boost Regulator 1.5A, 1.25 → 40 V 8-Pin, PDIP RS Stock No.: 516-5095 Mfr. Part No.: MC34063AP1G Datasheets: £0.88 Each	onsemi	-	-	1.5A	Buck Boost Switching	1	1.25 → 40 V	-	-	-	Through Hole	-	PDIP	-	8	-	-	-	-	-	10.16 x 6.6 x 3.44mm	3.44mm	40 V	+70 °C	3 V	0 °C
Texas Instruments LM1084IT-3.3/NOPB, 1 Low Dropout Voltage, Voltage Regulator 5A, 3.3 V 3-Pin, TO-220 RS Stock No.: 533-9319 Mfr. Part No.: LM1084IT-3.3/NOPB Datasheets: £1.97 Each	Texas Instruments	-	-	5A	Low Dropout Voltage	1	3.3 V	6 mV	-	15 mV	Through Hole	Positive	TO-220	-	3	-	Fixed	-	-	-	10.16 x 4.7 x 8.89mm	8.89mm	27 V	+125 °C	2.6 V	-40 °C
Linear Technology LTC1144CN8#PBF Charge Pump, Regulator, -18 V → -2 V 8-Pin, PDIP RS Stock No.: 545-5994 Mfr. Part No.: LTC1144CN8#PBF Datasheets: £6.04 Each	Linear Technology	-	-	-	Charge Pump	-	-18 V → -2 V	-	-	-	Through Hole	-	PDIP	-	8	-	-	-	-	-	10.16 x 6.48 x 3.3mm	3.3mm	-	+70 °C	-	0 °C
DiodesZetex AP7384-28V-A, 1 Low Dropout Voltage, Voltage Regulator 50mA, 2.8 V 3-Pin, TO-92 RS Stock No.: 182-8401P Mfr. Part No.: AP7384-28V-A Datasheets: £0.261 Each (Supplied on a Reel)	DiodesZetex	-	-	50mA	Low Dropout Voltage	1	2.8 V	0.05 %/V	-	0.5 V	Through Hole	Positive	TO-92	2.5µA	3	-	Fixed	-	-	-	4.8 x 3.8 x 4.7mm	4.7mm	40 V	+125 °C	3.3 V	-40 °C
Texas Instruments UA7810CKCS, 1 Linear Voltage, Voltage Regulator 1.5A, 10 V 3-Pin, TO-220 RS Stock No.: 661-6702 Mfr. Part No.: UA7810CKCS Datasheets: £0.742 Each (In a Pack of 5)	Texas Instruments	-	-	1.5A	Linear Voltage	1	10 V	200 mV	-	200 mV	Through Hole	Positive	TO-220	-	3	-	Fixed	-	-	-	10.16 x 4.58 x 8.7mm	8.7mm	28 V	+125 °C	12.5 V	0 °C
STMicroelectronics LD1117AV33, 1 Low Dropout Voltage, Voltage Regulator 1.2A, 3.3 V 3-Pin, TO-220 RS Stock No.: 686-9782 Mfr. Part No.: LD1117AV33 Datasheets: £0.24 Each (In a Pack of 10)	STMicroelectronics	-	-	1.2A	Low Dropout Voltage	1	3.3 V	6 mV	±2%	10 mV	Through Hole	Positive	TO-220	5mA	3	-	Fixed	-	-	-	10.4 x 4.6 x 9.15mm	9.15mm	10 V	+125 °C	-	0 °C