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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, 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 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 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 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 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 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 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 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 LM7915CT/NOPB, Voltage Regulator -23V TO-220 3-Pin RS Stock No. 197-7330 Mfr. Part No. LM7915CT/NOPB Subtotal (1 pack of 5 units) £5.55(exc. VAT) £1.11/unit Quantity	Texas Instruments	Voltage Regulator	-	-	-	TO-220	-	-	-	-	-	-	Through Hole	-	Negative	2mA	-	3	-	-	-	-	-	-	-	8.7mm	10.16mm	LM7915	No	-	-23V	125°C	-10V	-
In Stock Microchip MCP1700-3302E/TO, 5-Channel Low Dropout Voltage, Voltage Regulator, 250 mA, 3.3V, TO-92 3-Pin RS Stock No. 403-888 Mfr. Part No. MCP1700-3302E/TO Subtotal (1 pack of 10 units) £3.75(exc. VAT) £0.375/unit Quantity	Microchip	Voltage Regulator	-	Low Dropout Voltage	-	TO-92	-	-	0.75 %/V	-	-	1 %	Through Hole	-	Positive	1.6A	250mA	3	-	Fixed	-	-	-	-	-	4.62mm	4.71mm	MCP1700	RoHS	-	6V	125°C	2.3V	-40°C
In Stock Texas Instruments LM7815CT/NOPB, Voltage Regulator 17.5V TO-220 3-Pin RS Stock No. 796-8067 Mfr. Part No. LM7815CT/NOPB Subtotal (1 pack of 5 units) £6.39(exc. VAT) £1.278/unit Quantity	Texas Instruments	Voltage Regulator	-	-	-	TO-220	-	-	-	-	-	-	Through Hole	-	Positive	8.5mA	-	3	-	-	-	-	-	-	-	8.89mm	10.16mm	LM78xx	No	-	17.5V	70°C	-	-
In Stock DiodesZetex AP63205WU-7, 1-Channel Buck, Voltage Regulator, 2 A, 5V 1.1 MHz, TSOT-26 6-Pin RS Stock No. 718-530 Mfr. Part No. AP63205WU-7 Subtotal (1 unit) £0.95(exc. VAT) £0.95/unit Quantity	DiodesZetex	Voltage Regulator	-	Buck	-	TSOT-26	1	5V	-	1.1MHz	-	-	Surface	-	-	22μA	2A	6	-	Current, Voltage	-	-	-	-	-	1mm	3mm	AP63205	-	1.7mm	32V	85°C	3.8V	-40°C
In Stock STMicroelectronics, 5-Channel Linear, Voltage Regulator, 2 A, 7.5V, TO-220 3-Pin RS Stock No. 686-9026 Mfr. Part No. L78S75CV Subtotal (1 pack of 10 units) £4.10(exc. VAT) £0.41/unit Quantity	STMicroelectronics	Voltage Regulator	-	Linear	-	TO-220	-	-	120 mV	-	-	140 mV	Through Hole	-	Positive	8mA	2A	3	-	Fixed	-	-	Yes	-	-	9.15mm	10.4mm	L78Sxx	RoHS	-	35V	150°C	10.5V	0°C
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 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, 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 STMicroelectronics L7805CV-DG, Voltage Regulator 35V TO-220 3-Pin RS Stock No. 793-1346 Mfr. Part No. L7805CV-DG Subtotal (1 pack of 10 units) £3.17(exc. VAT) £0.317/unit Quantity	STMicroelectronics	Voltage Regulator	-	-	-	TO-220	-	-	-	-	-	-	Through Hole	-	Positive	6mA	-	3	-	-	-	-	-	-	-	15.75mm	10.4mm	L78xx	No	-	35V	125°C	-	-
In Stock Nisshinbo Micro Devices, 5-Channel Low Dropout Voltage, Voltage Regulator, 180 mA, 10V, SOT-89 6-Pin RS Stock No. 313-8417P Mfr. Part No. NJM2370U1-10 Subtotal 5 units (supplied on a continuous strip) £2.30(exc. VAT) £0.46/unit Quantity	Nisshinbo Micro Devices	Voltage Regulator	-	Low Dropout Voltage	-	SOT-89	-	-	0.12 %/V	-	-	0.03 %/mA	Surface	-	Positive	0.18mA	180mA	6	-	Fixed	0.35W	-	No	-	-	1.5mm	4.5mm	NJM2370	RoHS	-	20V	85°C	-	-40°C
In Stock United Automation CSR1004A Linear, Voltage Regulator, 10 A, 230V 3-Pin RS Stock No. 307-957 Mfr. Part No. CSR1004A Subtotal (1 unit) £24.06(exc. VAT) £24.06/unit Quantity	United Automation	Voltage Regulator	-	Linear	-	-	-	-	-	-	-	-	Through Hole	-	-	-	10A	3	-	Adjustable	-	-	-	-	-	29.3mm	17.5mm	CSR1	No	-	230V	70°C	-	0°C
In Stock Texas Instruments LM1117T-3.3/NOPB, Voltage Regulator 15V TO-220 3-Pin RS Stock No. 535-9256 Mfr. Part No. LM1117T-3.3/NOPB Subtotal (1 pack of 5 units) £7.10(exc. VAT) £1.42/unit Quantity	Texas Instruments	Voltage Regulator	-	-	-	TO-220	-	-	-	-	-	-	Through Hole	-	Positive	5mA	-	3	-	-	-	-	-	-	-	8.89mm	10.16mm	LM1117	No	4.7mm	15V	125°C	-	-