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 829-3266
Référence fabricantLR8N3-G
MarqueMicrochip
0,53 €
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1.2 440 V 30mA Adjustable TO-92 Through Hole 13.2 V 450 V 3 - -40 °C +85 °C 1 Positive ±5%
N° de stock RS 516-5821
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0,56 €
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5 V 1A Fixed TO-220 Through Hole - 35 V 3 - -40 °C +125 °C 1 Positive ±4%
N° de stock RS 795-8561
Référence fabricantL78M15CDT-TR
0,418 €
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15 V 500mA Fixed DPAK Surface Mount - 35 V dc 3 - 0 °C +150 °C 1 Positive -
N° de stock RS 516-6199
Référence fabricantMC7905CTG
0,52 €
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-5 V 1A Fixed TO-220 Through Hole - -35 V 3 - 0 °C +125 °C 1 Negative ±4%
N° de stock RS 663-3237
Référence fabricantLM323K STEEL/NOPB
37,33 €
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5 V 3A Fixed TO-3 Through Hole 7.5 V 20 V 3 30W 0 °C +125 °C 1 Positive -
N° de stock RS 168-6062
Référence fabricantL7824CV
0,334 €
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24 V 1.5A Fixed TO-220 Through Hole - 40 V 3 - 0 °C +150 °C 1 Positive -
N° de stock RS 170-3424
Référence fabricantMC79L05ABDG
0,303 €
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-5 V 100mA Fixed SOIC Surface Mount - -30 V 8 - -40 °C +125 °C 1 Negative -
N° de stock RS 661-6730
Référence fabricantUA78M05IDCY
0,55 €
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5 V 500mA Fixed SOT-223 Surface Mount 7 V 25 V 3+Tab - -40 °C +125 °C 1 Positive -
N° de stock RS 165-7751
Référence fabricantL79L05ACUTR
0,104 €
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-5 V 100mA Fixed SOT-89 Surface Mount - -30 V 3 - 0 °C +125 °C 1 Negative ±5%
N° de stock RS 686-9404
Référence fabricantL79L05ACUTR
0,289 €
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-5 V 100mA Fixed SOT-89 Surface Mount - -30 V 3 - 0 °C +125 °C 1 Negative ±5%
N° de stock RS 163-2491
Référence fabricantMC7905CTG
0,43 €
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-5 V 1A Fixed TO-220 Through Hole - -35 V 3 - 0 °C +125 °C 1 Negative ±4%
N° de stock RS 713-9473
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0,856 €
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8 V 1.5A Fixed TO-252 Surface Mount - 35 V 3 1W -40 °C +85 °C 1 Positive -
N° de stock RS 398-697
Référence fabricantTS7805CZ COG
0,267 €
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5 V 2.2A Fixed TO-220 Through Hole - 35 V 3 - 0 °C +125 °C 1 Positive ±4%
N° de stock RS 661-6121
Référence fabricantLM317KCS
0,728 €
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1.25 37 V 1.5A Adjustable TO-220 Through Hole 4.2 V 40 V 3 - 0 °C +125 °C 1 Positive -
N° de stock RS 168-6559
Référence fabricantL7805CDT-TR
0,232 €
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5 V 1.5A Fixed DPAK Surface Mount - 35 V 3 - 0 °C +150 °C 1 Positive -
N° de stock RS 536-1647
Référence fabricantLM317AMDT/NOPB
2,218 €
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1.2 37 V 500mA Adjustable TO-252 Surface Mount 4.2 V 40 V 3 - -40 °C +125 °C 1 Positive ±1%
N° de stock RS 686-9221
Référence fabricantL7805CDT-TR
0,625 €
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5 V 1.5A Fixed DPAK Surface Mount - 35 V 3 - 0 °C +150 °C 1 Positive -
N° de stock RS 163-2412
Référence fabricantLM317MDTRKG
0,14 €
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1.2 37 V 250mA Adjustable DPAK Surface Mount - 40 V 3 - 0 °C +125 °C 1 Positive ±4%
N° de stock RS 155-7558
Référence fabricantLT3050EMSE#PBF
2,176 €
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0.6 44.5 V 100mA Adjustable MSOP Surface Mount 1.6 V 45 V 12 - -40 °C +125 °C 1 Positive ±2%
N° de stock RS 785-6998
Référence fabricantMC7824BTG
0,345 €
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24 V 1A Fixed TO-220 Through Hole - 40 V dc 3 15W -40 °C +125 °C 1 Positive -