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.

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Description Prix 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
N° de stock RS 168-6809
Référence fabricantLM317T
0,464 €
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1.2 37 V 1.5A Adjustable TO-220 Through Hole 3 V 40 V 3 - 0 °C +125 °C 1 Positive -
N° de stock RS 714-0792
Référence fabricantLM317T
0,51 €
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1.2 37 V 1.5A Adjustable TO-220 Through Hole 3 V 40 V 3 - 0 °C +125 °C 1 Positive -
N° de stock RS 370-9637
Référence fabricantL200CV
2,694 €
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2.85 36 V 2A Adjustable PENTAWATT Through Hole 8 V 18 V 5 - -25 °C +150 °C 1 Positive -
N° de stock RS 168-6067
Référence fabricantL7915CV
0,424 €
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-15 V 1.5A Fixed TO-220 Through Hole - -35 V 3 - 0 °C +150 °C 1 Negative -
N° de stock RS 168-6061
Référence fabricantL7815CV
0,367 €
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15 V 1.5A Fixed TO-220 Through Hole - 35 V 3 - 0 °C +150 °C 1 Positive -
N° de stock RS 298-8508
Référence fabricantL7805ACV
2,22 €
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5 V 1A Fixed TO-220 Through Hole - 35 V 3 - 0 °C +150 °C 1 Positive 2%
N° de stock RS 298-8621
Référence fabricantL7915CV
2,22 €
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-15 V 1.5A Fixed TO-220 Through Hole - -35 V 3 - 0 °C +150 °C 1 Negative -
N° de stock RS 298-8558
Référence fabricantL7815CV
2,22 €
Each
Unité
15 V 1.5A Fixed TO-220 Through Hole - 35 V 3 - 0 °C +150 °C 1 Positive -
N° de stock RS 168-6059
Référence fabricantL7805ACV
0,42 €
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Unité
5 V 1A Fixed TO-220 Through Hole - 35 V 3 - 0 °C +150 °C 1 Positive 2%
N° de stock RS 298-8520
Référence fabricantL7808CV
2,22 €
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8 V 1.5A Fixed TO-220 Through Hole - 35 V 3 - 0 °C +150 °C 1 Positive -
N° de stock RS 168-6060
Référence fabricantL7808CV
0,334 €
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8 V 1.5A Fixed TO-220 Through Hole - 35 V 3 - 0 °C +150 °C 1 Positive -
N° de stock RS 714-7768
Référence fabricantL78L05ACZTR
0,302 €
Each (In a Pack of 25)
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5 V 100mA Fixed TO-92 Through Hole - 30 V 3 - 0 °C +150 °C 1 Positive ±5%
N° de stock RS 168-6801
Référence fabricantL78M05CDT-TR
0,135 €
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5 V 500mA Fixed DPAK Surface Mount - 35 V 3 - 0 °C +150 °C 1 Positive -
N° de stock RS 714-0688
Référence fabricantL78M05CDT-TR
0,33 €
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5 V 500mA Fixed DPAK Surface Mount - 35 V 3 - 0 °C +150 °C 1 Positive -
N° de stock RS 102-3529
Référence fabricantL78L05ACZTR
0,108 €
Each (On a Reel of 2000)
Unité
5 V 100mA Fixed TO-92 Through Hole - 30 V 3 - 0 °C +150 °C 1 Positive ±5%
N° de stock RS 168-6049
Référence fabricantL78L05ACZ
0,091 €
Each (In a Bag of 2500)
Unité
5 V 100mA Fixed TO-92 Through Hole - 30 V 3 - 0 °C +125 °C 1 Positive ±5%
N° de stock RS 189-1295
Référence fabricantL78L05ACZ
2,22 €
Each
Unité
5 V 100mA Fixed TO-92 Through Hole - 30 V 3 - 0 °C +125 °C 1 Positive ±5%
N° de stock RS 918-1971
Référence fabricantL7805CV
0,367 €
Each (In a Tube of 50)
Unité
5 V 1.5A Fixed TO-220 Through Hole - 35 V 3 - 0 °C +125 °C 1 Positive -
N° de stock RS 918-1975
Référence fabricantL7812CV
0,334 €
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12 V 1.5A Fixed TO-220 Through Hole - 40 V 3 - 0 °C +125 °C 1 Positive -
N° de stock RS 168-6800
Référence fabricantL7908CV
0,356 €
Each (In a Tube of 50)
Unité
-8 V 1.5A Fixed TO-220 Through Hole - -35 V 3 - 0 °C +150 °C 1 Negative -