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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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In Stock STMicroelectronics L78L12ACZ, Voltage Regulator 35V TO-92 3-Pin RS Stock No. 189-1302 Mfr. Part No. L78L12ACZ Subtotal (1 unit) £0.19(exc. VAT) £0.19/unit Quantity	STMicroelectronics	Voltage Regulator	-	-	-	TO-92	-	-	-	-	-	-	Through Hole	-	Positive	6.5mA	-	3	-	-	-	-	-	-	-	4.95mm	4.95mm	L78Lxx	No	-	35V	150°C	14V	-
In Stock STMicroelectronics, 5-Channel Linear, Voltage Regulator, 2.2 A, 37V, TO-220 3-Pin RS Stock No. 860-7286 Mfr. Part No. LM317BT Subtotal (1 pack of 10 units) £2.86(exc. VAT) £0.286/unit Quantity	STMicroelectronics	Voltage Regulator	-	Linear	-	TO-220	-	-	0.07 %/V	-	-	70 mV	Through Hole	-	Positive	-	2.2A	3	-	Adjustable	-	-	No	-	-	15.75mm	10.4mm	LM317	RoHS	-	40V	125°C	-	-40°C
In Stock STMicroelectronics, 5-Channel Linear, Voltage Regulator, 1 A, 12V, TO-220 3-Pin RS Stock No. 298-8586 Mfr. Part No. L7812ACV Subtotal (1 unit) £0.53(exc. VAT) £0.53/unit Quantity	STMicroelectronics	Voltage Regulator	-	Linear	-	TO-220	-	-	120 mV	-	-	100 mV	Through Hole	-	Positive	4.4mA	1A	3	-	Fixed	-	-	No	-	-	9.15mm	10.4mm	L78xx	RoHS	-	35V	150°C	-	0°C
In Stock Nisshinbo Micro Devices NJW4107U3-05B-TE1, 1-Channel Low Dropout Voltage, LOD Voltage Regulator, 300 mA, 5V 5-Pin RS Stock No. 244-4562 Mfr. Part No. NJW4107U3-05B-TE1 Subtotal (1 pack of 5 units) £10.70(exc. VAT) £2.14/unit Quantity	Nisshinbo Micro Devices	LOD Voltage Regulator	-	Low Dropout Voltage	-	-	-	-	34 mV	-	-	22.5 %/mV	Surface	-	-	135μA	300mA	5	-	-	-	-	-	-	-	-	-	NJW4107	RoHS	-	40V	125°C	4V	-40°C
In Stock onsemi, Voltage Regulator 30V SOIC 8-Pin RS Stock No. 688-9269P Mfr. Part No. MC78L05ABDR2G Subtotal 2 units (supplied on a continuous strip) £0.72(exc. VAT) £0.36/unit Quantity	onsemi	Voltage Regulator	-	-	-	SOIC	-	-	-	-	-	-	Surface	-	Positive	3mA	-	8	-	-	-	-	-	-	-	1.5mm	5mm	MC78Lxx	No	-	30V	125°C	6.7V	-
In Stock Texas Instruments LM317T/NOPB, Voltage Regulator 40V TO-220 3-Pin RS Stock No. 533-8209 Mfr. Part No. LM317T/NOPB Subtotal (1 unit) £1.75(exc. VAT) £1.75/unit Quantity	Texas Instruments	Voltage Regulator	-	-	-	TO-220	-	-	-	-	-	-	Through Hole	-	Positive	4mA	-	3	-	-	-	-	-	-	-	8.89mm	10.16mm	LM317	No	-	40V	125°C	4.2V	-
In Stock STMicroelectronics L7812CV, 5-Channel Linear, Voltage Regulator, 1.5 A, 12V, TO-220 3-Pin RS Stock No. 918-1975 Mfr. Part No. L7812CV Subtotal (1 tube of 50 units) £11.30(exc. VAT) £0.226/unit Quantity	STMicroelectronics	Voltage Regulator	-	Linear	-	TO-220	-	-	240 mV	-	-	240 mV	Through Hole	-	Positive	8mA	1.5A	3	-	Fixed	-	-	No	-	-	15.75mm	10.4mm	L78xx	RoHS	-	40V	125°C	-	0°C
In Stock Texas Instruments LM2940T-10.0/NOPB, Voltage Regulator 26V TO-220 3-Pin RS Stock No. 535-9010 Mfr. Part No. LM2940T-10.0/NOPB Subtotal (1 pack of 5 units) £7.35(exc. VAT) £1.47/unit Quantity	Texas Instruments	Voltage Regulator	-	-	-	TO-220	-	10V	-	-	-	-	Through Hole	-	Positive	10mA	-	3	-	-	-	-	-	-	-	8.89mm	10.16mm	LM2940-N	No	4.7mm	26V	125°C	11.5V	-
In Stock Microchip MIC29502WT, Voltage Regulator 26V TO-220 5-Pin RS Stock No. 910-1408 Mfr. Part No. MIC29502WT Subtotal (1 unit) £7.48(exc. VAT) £7.48/unit Quantity	Microchip	Voltage Regulator	-	-	-	TO-220	-	-	-	-	-	-	Through Hole	-	Positive	-	-	5	-	-	-	-	-	-	-	9.17mm	10.67mm	MIC2950	No	-	26V	125°C	2.5V	-
In Stock Texas Instruments LM7805CT/NOPB, Voltage Regulator 35V TO-220 3-Pin RS Stock No. 796-8060 Mfr. Part No. LM7805CT/NOPB Subtotal (1 pack of 5 units) £6.75(exc. VAT) £1.35/unit Quantity	Texas Instruments	Voltage Regulator	-	-	-	TO-220	-	-	-	-	-	-	Through Hole	-	Positive	8.5mA	-	3	-	-	-	-	-	-	-	8.89mm	10.16mm	LM78xx	No	-	35V	70°C	7.5V	-
In Stock Texas Instruments LM2576HVT-ADJ/LF03, 5-Channel Buck, Boost, Buck Converter, 3 A, 57V 52 kHz, TO-220 5-Pin RS Stock No. 796-8026 Mfr. Part No. LM2576HVT-ADJ/LF03 Subtotal (1 unit) £5.07(exc. VAT) £5.07/unit Quantity	Texas Instruments	Buck Converter	-	Buck, Boost	-	TO-220	5	57V	-	52kHz	-	-	Through Hole	-	-	5mA	3A	5	-	Adjustable	-	-	Yes	-	-	8.64mm	10.16mm	LM2576	RoHS	4.57mm	60V	125°C	40V	-40°C
In Stock Texas Instruments LM1117MP-3.3/NOPB, Voltage Regulator 15V SOT-223 4-Pin RS Stock No. 533-9577 Mfr. Part No. LM1117MP-3.3/NOPB Subtotal (1 unit) £1.19(exc. VAT) £1.19/unit Quantity	Texas Instruments	Voltage Regulator	-	-	-	SOT-223	-	-	-	-	-	-	Surface	-	Positive	5mA	-	4	-	-	-	-	-	-	-	1.6mm	6.5mm	LM1117	No	3.56mm	15V	125°C	-	-
In Stock Microchip MIC29300-5.0WU, 1-Channel Low Dropout Voltage, Voltage Regulator, 3 A, 5V, TO-263 3-Pin RS Stock No. 649-397 Mfr. Part No. MIC29300-5.0WU Subtotal (1 pack of 2 units) £7.02(exc. VAT) £3.51/unit Quantity	Microchip	Voltage Regulator	-	Low Dropout Voltage	-	TO-263	-	-	0.05 %	-	-	0.1 %	Through Hole, Surface	-	Positive	20mA	3A	3	-	-	-	-	No	-	-	-	-	MIC29	No	-	60V	125°C	-	-40°C
In Stock STMicroelectronics, Voltage Regulator 35V 3-Pin RS Stock No. 795-8537P Mfr. Part No. L78M12CDT-TR Subtotal 25 units (supplied on a continuous strip) £5.65(exc. VAT) £0.226/unit Quantity	STMicroelectronics	Voltage Regulator	-	-	-	-	-	-	-	-	-	-	Surface	-	Positive	6mA	-	3	-	-	-	-	-	-	-	2.4mm	6.6mm	L78Mxx	No	-	35V	150°C	-	-
In Stock Microchip MCP1754ST-3302E/CB, Voltage Regulator 16V SOT-23A 3-Pin RS Stock No. 755-9521 Mfr. Part No. MCP1754ST-3302E/CB Subtotal (1 pack of 5 units) £2.03(exc. VAT) £0.406/unit Quantity	Microchip	Voltage Regulator	-	-	-	SOT-23A	-	-	-	-	-	-	Surface	-	Positive	0.09mA	-	3	-	-	-	-	-	-	-	1.3mm	3.1mm	MCP1754	No	-	16V	125°C	3.3V	-
In Stock STMicroelectronics, 5-Channel Linear, Voltage Regulator, 1.5 A, 37V, TO-220 3-Pin RS Stock No. 714-0792 Mfr. Part No. LM317T Subtotal (1 pack of 10 units) £2.98(exc. VAT) £0.298/unit Quantity	STMicroelectronics	Voltage Regulator	-	Linear	-	TO-220	-	-	0.04 %/V	-	-	0.5 %, 0.5 %Vo, 25 mV%/Vo	Through Hole	-	Positive	-	1.5A	3	-	Adjustable	-	-	No	-	-	9.15mm	10.4mm	LM317	RoHS	-	40V	125°C	3V	0°C
In Stock Nisshinbo Micro Devices NJM78M18DL1A-TE1, 5-Channel Voltage, Voltage Regulator, 500 mA, 18V RS Stock No. 248-4287 Mfr. Part No. NJM78M18DL1A-TE1 Subtotal (1 pack of 5 units) £7.30(exc. VAT) £1.46/unit Quantity	Nisshinbo Micro Devices	Voltage Regulator	-	Voltage	-	-	-	-	10 mV	-	-	15 mV	-	-	Positive	6mA	500mA	-	-	Voltage	-	-	-	-	-	-	-	NJM78M00	No	-	40V	150°C	35V	-40°C
In Stock ROHM BD33FC0JEFJ-E2, 1-Channel Low Dropout (Ldo) Linear Regulator, Regulator, 1 A, 3.3V, HTSOP-J8 8-Pin RS Stock No. 780-401 Mfr. Part No. BD33FC0JEFJ-E2 Subtotal (1 tape of 10 units) £10.69(exc. VAT) £1.069/unit Quantity	ROHM	Regulator	-	Low Dropout (Ldo) Linear Regulator	-	HTSOP-J8	1	3.3V	20 to 80 mV	-	-	0.010 to 0.020 V	Surface	-	-	-	1A	8	-	-	-	-	No	-	-	1mm	6mm	BDxxFC0 Series	RoHS Compliant	4.9mm	35V	85°C	4V	-25°C
In Stock Microchip MCP1703AT-3302E/CB, 5-Channel Low Dropout Voltage, Voltage Regulator, 250 mA, 3.3V, SOT-23 3-Pin RS Stock No. 770-9509 Mfr. Part No. MCP1703AT-3302E/CB Subtotal (1 pack of 10 units) £4.50(exc. VAT) £0.45/unit Quantity	Microchip	Voltage Regulator	-	Low Dropout Voltage	-	SOT-23	-	-	0.3 %/V	-	-	2.5 %	Surface	-	Positive	5μA	250mA	3	-	Fixed	-	-	-	-	-	1.3mm	3.1mm	MCP1703A	RoHS	-	16V	125°C	2.7V	-40°C
In Stock onsemi, Voltage Regulator 18V SOT-223 4-Pin RS Stock No. 802-2137P Mfr. Part No. NCP1117LPST33T3G Subtotal 25 units (supplied on a continuous strip) £4.20(exc. VAT) £0.168/unit Quantity	onsemi	Voltage Regulator	-	-	-	SOT-223	-	-	-	-	-	-	Surface	-	Positive	700μA	-	4	-	-	-	-	-	-	-	1.69mm	6.7mm	NCP1117LP	No	3.7mm	18V	125°C	-0.3V	-