Linear Voltage Regulators

A Linear Voltage Regulator ensures the output voltage from the circuit is maintained at a specific voltage.

The device acts as a variable resistor, continuously adjusting to maintain a constant output voltage. The regulated voltage must be lower than the input voltage. Simple voltage regulator contains a Zener Diode and a resistor but more complicated versions include elements like a voltage reference and error amplifiers.

A more specific type of regulator are Low Dropout Voltage Regulators (LDO) which can regulate voltage even when the power supply voltage is very close to the supply voltage.


How to choose linear voltage regulator ICs?


The primary feature in choosing a regulator is usually the Output voltage as the main purpose of one is to regulate the voltage to a specific value such as 3.3V. Its accuracy to this voltage across temperature and load current is another consideration as is its maximum load. The dropout voltage value will be particularly important with battery applications.


How to test a linear voltage regulator?


  1. Set your multimeter to the voltage setting
  2. Check the datasheet to determine which pins are the ground, input and output.
  3. Attach the red wire to the input and the black wire to the ground, the multimeter should give a reading higher than the regulators' output value. If not then there is a power supply issue.
  4. Attach the red to the ground and the black wire the output, the multimeter should then give the regulators' output value (plus minus its accuracy). If not then the regulator is likely to be faulty.

...
Read more Read less

Filters

Viewing 61 - 80 of 1937 products
Results per page
Description Price Output Voltage Maximum Output Current Output Type Package Type Mounting Type Minimum Input Voltage Maximum Input Voltage Pin Count Power Rating Minimum Operating Temperature Maximum Operating Temperature Number of Outputs Polarity Accuracy
RS Stock No. 100-0704
Mfr. Part No.LM340T-5.0/NOPB
£0.99
Each (In a Tube of 45)
Units
5 V 1A Fixed TO-220 Through Hole 7.5 V 35 V 3 - 0 °C +125 °C 1 Positive ±2%
RS Stock No. 308-584
Mfr. Part No.CSR1504A
£19.65
Each
Units
230 V 15A Adjustable - Through Hole - 230 V 3 - 0 °C +70 °C - - -
RS Stock No. 922-8285
Mfr. Part No.AP1117E33G-13
£0.088
Each (On a Reel of 2500)
Units
3.3 V 1A Fixed SOT-223 Surface Mount 6.4 V 18 V 3+Tab - 0 °C +125 °C 1 Positive -
RS Stock No. 102-5753
Mfr. Part No.LM78L05ACM/NOPB
£0.50
Each (In a Tube of 95)
Units
5 V 100mA Fixed SOIC Surface Mount 6.7 V 35 V 8 0.75W 0 °C +125 °C 1 Positive ±5%
RS Stock No. 751-2890
Mfr. Part No.AP1117E33G-13
£0.255
Each (In a Pack of 50)
Units
3.3 V 1A Fixed SOT-223 Surface Mount 6.4 V 18 V 3+Tab - 0 °C +125 °C 1 Positive -
RS Stock No. 536-1394
Mfr. Part No.LM78L05ACM/NOPB
£2.01
Each
Units
5 V 100mA Fixed SOIC Surface Mount 6.7 V 35 V 8 0.75W 0 °C +125 °C 1 Positive ±5%
RS Stock No. 168-6536
Mfr. Part No.L78S75CV
£0.539
Each (In a Tube of 50)
Units
7.5 V 2A Fixed TO-220 Through Hole 10.5 V 35 V 3 - 0 °C +150 °C 1 Positive -
RS Stock No. 686-9026
Mfr. Part No.L78S75CV
£0.593
Each (In a Pack of 10)
Units
7.5 V 2A Fixed TO-220 Through Hole 10.5 V 35 V 3 - 0 °C +150 °C 1 Positive -
RS Stock No. 124-6450
Mfr. Part No.BA17805FP-E2
BrandROHM
£0.368
Each (In a Pack of 10)
Units
5 V 1A Fixed TO-252 Surface Mount 7.5 V 25 V 3 - -40 °C +85 °C 1 Positive ±4%
RS Stock No. 829-3266
Mfr. Part No.LR8N3-G
BrandMicrochip
£0.399
Each (In a Pack of 10)
Units
1.2 → 440 V 30mA Adjustable TO-92 Through Hole 13.2 V 450 V 3 - -40 °C +85 °C 1 Positive ±5%
RS Stock No. 170-4344
Mfr. Part No.LR8N3-G
BrandMicrochip
£0.35
Each (In a Bag of 1000)
Units
- - - - - - - - - - - - - -
RS Stock No. 661-3627
Mfr. Part No.LM317DCYR
£0.624
Each (In a Pack of 5)
Units
1.25 → 37 V 1.5A Adjustable SOT-223 Surface Mount 4.2 V 40 V 3+Tab - 0 °C +125 °C 1 Positive -
RS Stock No. 661-6128
Mfr. Part No.LM317DCY
£0.794
Each (In a Pack of 5)
Units
1.25 → 37 V 1.5A Adjustable SOT-223 Surface Mount 4.2 V 40 V 3+Tab - 0 °C +125 °C 1 Positive -
RS Stock No. 121-9159
Mfr. Part No.LM317DCY
£0.558
Each (In a Tube of 80)
Units
1.25 → 37 V 1.5A Adjustable SOT-223 Surface Mount 4.2 V 40 V 3+Tab - 0 °C +125 °C 1 Positive -
RS Stock No. 921-6910
Mfr. Part No.LM340MP-5.0/NOPB
£0.466
Each (On a Reel of 1000)
Units
5 V 1A Fixed SOT-223 Surface Mount 7.5 V 35 V 3+Tab - 0 °C +125 °C 1 Positive -
RS Stock No. 903-4327
Mfr. Part No.LM78L05ACZX
£0.15
Each (In a Pack of 100)
Units
5 V 100mA Fixed TO-92 Through Hole - 35 V 3 - -40 °C +125 °C 1 Positive ±5%
RS Stock No. 686-9751
Mfr. Part No.L78S09CV
£0.542
Each (In a Pack of 10)
Units
9 V 2A Fixed TO-220 Through Hole 12 V 35 V 3 - 0 °C +150 °C 1 Positive -
RS Stock No. 145-8603
Mfr. Part No.L78S09CV
£0.451
Each (In a Tube of 50)
Units
9 V 2A Fixed TO-220 Through Hole 12 V 35 V 3 - 0 °C +150 °C 1 Positive -
RS Stock No. 761-3549
Mfr. Part No.LM78L05ACZ
£0.20
Each (In a Pack of 25)
Units
5 V 100mA Fixed TO-92 Through Hole - 30 V 3 - 0 °C +125 °C 1 Positive ±5%
RS Stock No. 661-6730
Mfr. Part No.UA78M05IDCY
£0.658
Each (In a Pack of 5)
Units
5 V 500mA Fixed SOT-223 Surface Mount 7 V 25 V 3+Tab - -40 °C +125 °C 1 Positive -
Related Products
The Low dropout or LDO is a linear ...
Description:
The Low dropout or LDO is a linear voltage regulator. We have a wide range of linear regulators. The LDO regulator can operate with a small input–output differential voltage. LDO voltage regulators may offer fast transient response, wide input voltage range, low quiescent current and low noise with high PSRR. ...
L7985TR | STMicroelectronics, 0.6 → 38 V Linear ...
Description:
L7985TR | STMicroelectronics, 0.6 → 38 V Linear Voltage Regulator, 2A, 1-Channel Negative, Positive, Adjustable 10-Pin,
The Offline, AC-DC switching regulators, feature control in ...
Description:
The Offline, AC-DC switching regulators, feature control in current and voltage mode. The NCP105x series are gated oscillator power switching regulators. Applications include robust and highly efficient power supplies, essentially Switch Mode Power Supply (SMPS).