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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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Last RS stock Maxim Integrated, Voltage Regulator 330 mW 5.5V 8-Pin RS Stock No. 191-6809P Mfr. Part No. MAX1795EUA+ Subtotal 1 unit (supplied in a tube) £11.28(exc. VAT) £11.28/unit Quantity	Maxim Integrated	Voltage Regulator	-	-	-	-	-	-	-	-	-	-	Surface	-	Positive	25μA	-	8	-	-	330mW	-	-	-	-	0.95mm	3.1mm	MAX1795	No	3.1mm	5.5V	85°C	1V	-
In Stock Microchip MIC29300-3.3WU, 1-Channel Low Dropout Voltage, Voltage Regulator, 3 A, 12V, TO-263 3-Pin RS Stock No. 649-386 Mfr. Part No. MIC29300-3.3WU Subtotal (1 pack of 2 units) £7.02(exc. VAT) £3.51/unit Quantity	Microchip	Voltage Regulator	-	Low Dropout Voltage	-	TO-263	-	-	0.5 %	-	-	1 %	Through Hole, Surface	-	Positive	75mA	3A	3	-	-	-	-	No	-	-	-	-	MIC29	No	-	26V	125°C	-	-40°C
In Stock Microchip MCP16311-E/MS, 1-Channel Synchronous Step-Down Voltage Regulator, Regulator, 1 A, 24V 500 kHz, MSOP 8-Pin RS Stock No. 765-479 Mfr. Part No. MCP16311-E/MS Subtotal (1 unit) £1.34(exc. VAT) £1.34/unit Quantity	Microchip	Regulator	-	Synchronous Step-Down Voltage Regulator	-	MSOP	1	24V	0.01 %/V	500kHz	-	0.0025	Surface	-	-	44μA	1A	8	-	2/24 V	12V	-	-	-	-	-	-	MCP16311/2	-	-	30V	150°C	4.4V	-40°C
Currently unavailable STMicroelectronics LD1085P, 1-Channel Low Dropout Voltage, Voltage Regulator, 1.25V, 28 V, TO-220FP 3-Pin RS Stock No. 686-9697P Mfr. Part No. LD1085P Subtotal 5 units (supplied in a tube) £8.40(exc. VAT) £1.68/unit Quantity	STMicroelectronics	Voltage Regulator	-	Low Dropout Voltage	-	TO-220FP	1	1.25, 28V	0.2 %	-	-	0.3 %	Through Hole	-	Positive	5mA	-	3	-	Adjustable	-	-	-	-	-	9.3mm	10.4mm	-	-	4.6mm	30V	125°C	-	-40°C
In Stock Microchip MCP1703A-5002E/DB, 1-Channel Low Dropout Voltage, Voltage Regulator, 250 mA, 5V, SOT-223 3-Pin RS Stock No. 649-445 Mfr. Part No. MCP1703A-5002E/DB Subtotal (1 pack of 5 units) £3.15(exc. VAT) £0.63/unit Quantity	Microchip	Voltage Regulator	-	Low Dropout Voltage	-	SOT-223	1	5V	±1 %	-	-	±1 %	-	-	-	2μA	250mA	3	-	-	-	-	No	-	-	-	-	MCP1703A	AEC-Q100	-	16.0V	125°C	5.65V	-40°C
In Stock Texas Instruments LM5001MA/NOPB, 1-Channel High Voltage, Boost Converter, 1 A, 1.26V 1500 kHz, SOIC 8-Pin RS Stock No. 181-382 Mfr. Part No. LM5001MA/NOPB Subtotal (1 unit) £4.04(exc. VAT) £4.04/unit Quantity	Texas Instruments	Boost Converter	-	High Voltage	-	SOIC	1	1.26V	-	1500kHz	-	-	Surface	-	Positive	3.1mA	1A	8	-	Adjustable	-	-	Yes	-	-	1.45mm	4.9mm	LM5001	RoHS	3.9mm	75V	125°C	3.1V	-40°C
In Stock Microchip MCP1703AT-3302E/DB, Voltage Regulator 16V SOT-223 3-Pin RS Stock No. 238-0646 Mfr. Part No. MCP1703AT-3302E/DB Subtotal (1 pack of 10 units) £6.30(exc. VAT) £0.63/unit Quantity	Microchip	Voltage Regulator	-	-	-	SOT-223	-	3.3V	-	-	-	-	Surface	-	Positive	5μA	-	3	-	-	-	-	-	-	-	1.6mm	6.5mm	MCP1703A	RoHS	3.5mm	16V	125°C	2.7V	-
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) £8.08(exc. VAT) £1.616/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 United Automation CSR2-10E Linear, Voltage Regulator, 10 A, 230V 3-Pin RS Stock No. 655-638 Mfr. Part No. CSR2-10E Subtotal (1 unit) £49.11(exc. VAT) £49.11/unit Quantity	United Automation	Voltage Regulator	-	Linear	-	-	-	230V	-	-	-	-	Panel	-	-	-	10A	3	-	Adjustable	-	-	-	-	-	42.5mm	43mm	CSR2	EN 61340-5-1	36mm	230V	75°C	-	0°C
In Stock ROHM BD50FC0JEFJ-E2, 1-Channel Low Dropout (Ldo) Linear Regulator, Regulator, 1 A, 5V, HTSOP-J8 8-Pin RS Stock No. 780-402 Mfr. Part No. BD50FC0JEFJ-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	5V	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 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	5	37V	0.07 %/V	-	-	70 mV	Through Hole	-	Positive	-	2.2A	3	-	Adjustable	-	-	No	-	-	15.75mm	10.4mm	LM317	RoHS	4.6mm	40V	125°C	-	-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 ROHM BDJ2FC0JEFJ-E2, 1-Channel Low Noise LDO, Regulator, 1 A, 12V, HTSOP-J8 8-Pin RS Stock No. 780-674 Mfr. Part No. BDJ2FC0JEFJ-E2 Subtotal (1 tape of 10 units) £6.13(exc. VAT) £0.613/unit Quantity	ROHM	Regulator	-	Low Noise LDO	-	HTSOP-J8	1	12V	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
Last RS stock Texas Instruments TPS63031DSKT, 5-Channel Buck, Boost, Buck Boost Switching Regulator, 800 mA, 3.3V 2400 kHz, SON 10-Pin RS Stock No. 698-9091 Mfr. Part No. TPS63031DSKT Subtotal (1 unit) £2.64(exc. VAT) £2.64/unit Quantity	Texas Instruments	Buck Boost Switching Regulator	-	Buck, Boost	-	SON	5	3.3V	0.5 %	2400kHz	-	0.5 %	Surface	-	Positive	50μA	800mA	10	-	Fixed	-	-	Yes	-	-	0.75mm	2.5mm	TPS6303x	No	2.5mm	5.5V	85°C	1.8V	-40°C
In Stock STMicroelectronics L78L05ACZ, Voltage Regulator 30V TO-92 3-Pin RS Stock No. 189-1295 Mfr. Part No. L78L05ACZ Subtotal (1 unit) £0.21(exc. VAT) £0.21/unit Quantity	STMicroelectronics	Voltage Regulator	-	-	-	TO-92	-	-	-	-	-	-	Through Hole	-	Positive	6mA	-	3	-	-	-	-	-	-	-	4.95mm	4.95mm	L78Lxx	No	3.94mm	30V	125°C	-	-
Last RS stock Texas Instruments, 5-Channel Buck, Boost, Buck Boost Switching Regulator, 1.2 A, 5.5V 1500 kHz, SON 10-Pin RS Stock No. 389-334P Mfr. Part No. TPS63000DRCT Subtotal 1 unit (supplied on a continuous strip) £1.13(exc. VAT) £1.13/unit Quantity	Texas Instruments	Buck Boost Switching Regulator	-	Buck, Boost	-	SON	5	5.5V	0.5 %	1500kHz	-	0.5 %	Surface	-	-	50μA	1.2A	10	-	Adjustable	-	-	Yes	-	-	0.9mm	3mm	TPS6300x	RoHS	3mm	5.5V	85°C	1.8V	-40°C
In Stock Microchip, Voltage Regulator 13.2V SOT-23A 3-Pin RS Stock No. 738-6572P Mfr. Part No. MCP1702T-5002E/CB Subtotal 10 units (supplied on a continuous strip) £4.88(exc. VAT) £0.488/unit Quantity	Microchip	Voltage Regulator	-	-	-	SOT-23A	-	-	-	-	-	-	Surface	-	Positive	2μA	-	3	-	-	-	-	-	-	-	1.3mm	3.1mm	MCP1702	No	1.8mm	13.2V	125°C	2.7V	-
In Stock Nisshinbo Micro Devices NJM431SU-TE1, 1-Channel, Voltage Regulator, 100 mA, 2.495V 5-Pin RS Stock No. 241-2948 Mfr. Part No. NJM431SU-TE1 Subtotal (1 pack of 10 units) £2.78(exc. VAT) £0.278/unit Quantity	Nisshinbo Micro Devices	Voltage Regulator	-	-	-	-	-	-	-	-	-	-	Surface	-	-	-	100mA	5	-	-	-	-	-	-	-	-	-	NJM431S	RoHS	-	17V	125°C	8V	-40°C
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	5	37V	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	4.6mm	40V	125°C	3V	0°C
In Stock DiodesZetex AP63301WU-7, 1-Channel Buck, Voltage Regulator, 3 A, 0.8V, 31 V 500 kHz, TSOT-26 6-Pin RS Stock No. 718-564 Mfr. Part No. AP63301WU-7 Subtotal (1 unit) £1.13(exc. VAT) £1.13/unit Quantity	DiodesZetex	Voltage Regulator	-	Buck	-	TSOT-26	1	0.8, 31V	-	500kHz	-	-	Surface	-	-	280μA	3A	6	-	Current, Voltage	-	-	-	-	-	1mm	3mm	AP63301	-	1.7mm	32V	85°C	3.8V	-40°C