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 1 - 20 of 33 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. 889-5991
Mfr. Part No.LR8K4-G
BrandMicrochip
R 10.634
Each (On a Reel of 2000)
units
1.2 → 440 V 30mA Adjustable TO-252 Surface Mount 13.2 V 450 V 3 - -40 °C +85 °C 1 Positive ±5%
RS stock no. 829-3257
Mfr. Part No.LR8K4-G
BrandMicrochip
R 15.516
Each (In a Pack of 10)
units
1.2 → 440 V 30mA Adjustable TO-252 Surface Mount 13.2 V 450 V 3 - -40 °C +85 °C 1 Positive ±5%
RS stock no. 170-4351
Mfr. Part No.LR645N3-G
BrandMicrochip
R 5.514
Each (In a Bag of 1000)
units
- - - - - - - - - - - - - -
RS stock no. 829-3443
Mfr. Part No.SR086SG-G
BrandMicrochip
R 16.695
Each (In a Pack of 10)
units
9 → 50 V 100mA Adjustable SOIC Surface Mount 90 V 270 V 8 200mW -40 °C +125 °C 1 Positive -
RS stock no. 178-5364
Mfr. Part No.SR086SG-G
BrandMicrochip
R 12.888
Each (On a Reel of 3300)
units
9 → 50 V 100mA Adjustable SOIC Surface Mount 90 V 270 V 8 200mW -40 °C +125 °C 1 Positive -
RS stock no. 170-4350
Mfr. Part No.LR12N3-G
BrandMicrochip
R 12.905
Each (In a Bag of 1000)
units
- - - - - - - - - - - - - -
RS stock no. 829-3421
Mfr. Part No.LR12N3-G
BrandMicrochip
R 16.505
Each (In a Pack of 10)
units
1.2 → 88 V 100mA Adjustable TO-92 Through Hole 13.2 V 100 V 3 - -40 °C +85 °C 1 Positive ±5%
RS stock no. 829-3437
Mfr. Part No.LR645N5-G
BrandMicrochip
R 18.254
Each (In a Pack of 5)
units
9 → 11.5 V 30mA Adjustable TO-220 Through Hole 15 V 450 V 3 - -55 °C +150 °C 1 Positive -
RS stock no. 829-3446
Mfr. Part No.LR645N8-G
BrandMicrochip
R 5.957
Each (In a Pack of 10)
units
9 → 11.5 V 30mA Adjustable SOT-89 Surface Mount 15 V 450 V 3 - -55 °C +150 °C 1 Positive -
RS stock no. 178-4926
Mfr. Part No.LR645N5-G
BrandMicrochip
R 15.223
Each (In a Tube of 50)
units
9 → 11.5 V 30mA Adjustable TO-220 Through Hole 15 V 450 V 3 - -55 °C +150 °C 1 Positive -
RS stock no. 829-3266
Mfr. Part No.LR8N3-G
BrandMicrochip
R 9.961
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. 178-5280
Mfr. Part No.LR645N8-G
BrandMicrochip
R 5.832
Each (On a Reel of 2000)
units
9 → 11.5 V 30mA Adjustable SOT-89 Surface Mount 15 V 450 V 3 - -55 °C +150 °C 1 Positive -
RS stock no. 170-4344
Mfr. Part No.LR8N3-G
BrandMicrochip
R 6.651
Each (In a Bag of 1000)
units
- - - - - - - - - - - - - -
RS stock no. 144-5871
Mfr. Part No.SR10LG-G
BrandMicrochip
R 4.802
Each (On a Reel of 3300)
units
6 → 28 V 50mA Adjustable SOIC Surface Mount 90 V 275 V 8 - -40 °C +125 °C 1 Positive -
RS stock no. 889-5796
Mfr. Part No.LR8N8-G
BrandMicrochip
R 7.03
Each (On a Reel of 2000)
units
1.2 → 440 V 30mA Adjustable SOT-89 Surface Mount 13.2 V 450 V 3 - -40 °C +85 °C 1 Positive ±5%
RS stock no. 911-2802
Mfr. Part No.MIC5281YMME
BrandMicrochip
R 13.644
Each (In a Pack of 5)
units
1.27 → 5.5 V 25mA Adjustable MSOP Surface Mount 6 V dc 120 V dc 8 - -40 °C +125 °C 1 Positive ±3%
RS stock no. 177-0468
Mfr. Part No.MIC5355-SGYMME
BrandMicrochip
R 5.637
Each (In a Tube of 100)
units
1.8 V, 3.3 V 500mA Fixed MSOP Surface Mount 2.5 V 5.5 V 8 - -40 °C +125 °C 2 Positive ±3%
RS stock no. 177-3296
Mfr. Part No.MIC94310-PYMT-T5
BrandMicrochip
R 6.472
Each (In a Pack of 20)
units
3 V 200mA Fixed DFN Surface Mount 1.8 V 3.6 V 4 - -40 °C +125 °C 1 - ±3%
RS stock no. 165-5153
Mfr. Part No.MIC94325YMT-TR
BrandMicrochip
R 4.06
Each (On a Reel of 5000)
units
1.2 → 3.4 V 500mA Adjustable DFN Surface Mount 1.8 V 3.6 V 6 - -40 °C +125 °C 1 Positive ±3%
RS stock no. 165-5152
Mfr. Part No.MIC5365-1.8YC5-TR
BrandMicrochip
R 1.355
Each (On a Reel of 3000)
units
1.8 V 150mA Fixed SC-70 Surface Mount 2.5 V 5.5 V 5 - -40 °C +125 °C 1 Positive ±2%