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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, 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, 5-Channel Linear, Voltage Regulator, 1.5 A, 5V, TO-220 3-Pin RS Stock No. 918-1971 Mfr. Part No. L7805CV Subtotal (1 tube of 50 units) £10.85(exc. VAT) £0.217/unit Quantity	STMicroelectronics	Voltage Regulator	-	Linear	-	TO-220	-	-	100 mV	-	-	100 mV	Through Hole	-	Positive	8mA	1.5A	3	-	Fixed	-	-	No	-	-	15.75mm	10.4mm	L78xx	RoHS	-	35V	125°C	-	0°C
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 LM338T/NOPB, Voltage Regulator 25 W 40V TO-220 3-Pin RS Stock No. 460-900 Mfr. Part No. LM338T/NOPB Subtotal (1 pack of 5 units) £10.22(exc. VAT) £2.044/unit Quantity	Texas Instruments	Voltage Regulator	-	-	-	TO-220	-	-	-	-	-	-	Through Hole	-	Positive	3mA	-	3	-	-	25W	-	-	-	-	8.89mm	10.16mm	LM338	No	-	40V	125°C	4.2V	-
In Stock Holtek HT7533-1-SOT89, Voltage Regulator 30V SOT-89 3-Pin RS Stock No. 885-0721 Mfr. Part No. HT7533-1-SOT89 Subtotal (1 pack of 20 units) £8.32(exc. VAT) £0.416/unit Quantity	Holtek	Voltage Regulator	-	-	-	SOT-89	-	-	-	-	-	-	Surface	-	Positive	4μA	-	3	-	-	-	-	-	-	-	1.6mm	4.6mm	HT75	No	2.6mm	30V	85°C	-	-
In Stock Texas Instruments LM340T-5.0/NOPB, Voltage Regulator 35V TO-220 3-Pin RS Stock No. 460-768 Mfr. Part No. LM340T-5.0/NOPB Subtotal (1 pack of 5 units) £7.66(exc. VAT) £1.532/unit Quantity	Texas Instruments	Voltage Regulator	-	-	-	TO-220	-	-	-	-	-	-	Through Hole	-	Positive	8mA	-	3	-	-	-	-	-	-	-	8.89mm	10.16mm	LM340	No	-	35V	125°C	7.5V	-
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 onsemi MC7812BTG, Voltage Regulator 35V TO-220 3-Pin RS Stock No. 463-454 Mfr. Part No. MC7812BTG Subtotal (1 pack of 20 units) £9.98(exc. VAT) £0.499/unit Quantity	onsemi	Voltage Regulator	-	-	-	TO-220	-	-	-	-	-	-	Through Hole	-	Positive	3.4mA	-	3	-	-	-	-	-	-	-	30.02mm	10.28mm	MC78xx	No	-	35V	125°C	12V	-
Temporarily out of stock STMicroelectronics LM317T, 5-Channel Linear, Voltage Regulator, 1.5 A, 37V, TO-220 3-Pin RS Stock No. 168-6809 Mfr. Part No. LM317T Subtotal (1 tube of 50 units) £12.40(exc. VAT) £0.248/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 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) £7.54(exc. VAT) £1.508/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 STMicroelectronics LM317LZ-TR, Voltage Regulator 40V TO-92 3-Pin RS Stock No. 686-9470 Mfr. Part No. LM317LZ-TR Subtotal (1 pack of 25 units) £3.70(exc. VAT) £0.148/unit Quantity	STMicroelectronics	Voltage Regulator	-	-	-	TO-92	-	-	-	-	-	-	Through Hole	-	Positive	-	-	3	-	-	-	-	-	-	-	4.95mm	4.95mm	LM317	ECOPACK	-	40V	125°C	-	-
In Stock Texas Instruments LM2941CT/NOPB, Voltage Regulator 26V TO-220 5-Pin RS Stock No. 533-5648 Mfr. Part No. LM2941CT/NOPB Subtotal (1 unit) £1.51(exc. VAT) £1.51/unit Quantity	Texas Instruments	Voltage Regulator	-	-	-	TO-220	-	-	-	-	-	-	Through Hole	-	Positive	10mA	-	5	-	-	-	-	-	-	-	8.89mm	10.16mm	LM2941	No	4.7mm	26V	125°C	-15V	-
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) £3.66(exc. VAT) £0.366/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 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
Last RS stock Renesas Electronics ICL7660CPAZ, 5-Channel Charge Pump, Regulator, 20 mA, 1.5V 10 kHz, PDIP 8-Pin RS Stock No. 921-5551 Mfr. Part No. ICL7660CPAZ Subtotal (1 pack of 5 units) £10.20(exc. VAT) £2.04/unit Quantity	Renesas Electronics	Regulator	-	Charge Pump	-	PDIP	-	-	-	10kHz	-	-	Through Hole	-	Inverting	-	20mA	8	-	Adjustable	-	-	Yes	-	-	4.95mm	10.16mm	ICL7660	RoHS	-	12V	70°C	1.5V	0°C
In Stock STMicroelectronics, 5-Channel Linear, Voltage Regulator, 1 A, 5V, TO-220 3-Pin RS Stock No. 298-8508 Mfr. Part No. L7805ACV Subtotal (1 unit) £0.44(exc. VAT) £0.44/unit Quantity	STMicroelectronics	Voltage Regulator	-	Linear	-	TO-220	-	-	50 mV	-	-	100 mV	Through Hole	-	Positive	4.3mA	1A	3	-	Fixed	-	-	No	-	-	9.15mm	10.4mm	L78xx	RoHS	-	35V	150°C	-	0°C
Currently unavailable STMicroelectronics LD1117V RS Stock No. 178-1486 Mfr. Part No. LD1117V Subtotal (1 tube of 50 units) £15.50(exc. VAT) £0.31/unit Quantity	STMicroelectronics	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
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) £2.33(exc. VAT) £2.33/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 Microchip MCP1825S-3302E/DB, 5-Channel Low Dropout Voltage, Voltage Regulator, 500 mA, 3.3V, SOT-223 3-Pin RS Stock No. 669-5092 Mfr. Part No. MCP1825S-3302E/DB Subtotal (1 pack of 5 units) £2.59(exc. VAT) £0.518/unit Quantity	Microchip	Voltage Regulator	-	Low Dropout Voltage	-	SOT-223	-	-	0.05 %/V	-	-	0.5 %	Surface	-	Positive	0.12mA	500mA	3	-	Fixed	-	-	No	-	-	1.6mm	6.5mm	MCP1825S	RoHS	-	6V	125°C	2.1V	-40°C
Currently unavailable ROHM, Voltage Regulator RS Stock No. 255-7656 Mfr. Part No. BD00FDAWHFP-TR Subtotal (1 reel of 2000 units) £1,984.00(exc. VAT) £0.992/unit Quantity	ROHM	Voltage Regulator	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	BD00FDAWHFP-TR	BD433U2EFJ-CE2	-	-	-	-	-