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 145-9664
Référence fabricantIFX27001TFV50ATMA1
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0,446 €
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5 V 1A Fixed TO-252 Surface Mount 13.5 V 40 V 3 - -40 °C +125 °C 1 Positive ±3%
N° de stock RS 827-5136
Référence fabricantIFX27001TFV50ATMA1
MarqueInfineon
0,49 €
Each (In a Pack of 25)
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5 V 1A Fixed TO-252 Surface Mount 13.5 V 40 V 3 - -40 °C +125 °C 1 Positive ±3%
N° de stock RS 906-3047
Référence fabricantTLE4285GHTSA1
MarqueInfineon
0,745 €
Each (In a Pack of 20)
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5 V 15mA Fixed SCT-595 Surface Mount 6 V 45 V 5 - -40 °C +150 °C 1 Positive 4%
N° de stock RS 166-1182
Référence fabricantTLE4286GHTSA1
MarqueInfineon
0,334 €
Each (On a Reel of 3000)
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5 V 15mA Fixed SCT-595 Surface Mount 6.2 V 42 V 5 - -40 °C +150 °C 1 Positive 4%
N° de stock RS 110-7423
Référence fabricantTLE4286GHTSA1
MarqueInfineon
0,708 €
Each (In a Pack of 15)
Unité
5 V 15mA Fixed SCT-595 Surface Mount 6.2 V 42 V 5 - -40 °C +150 °C 1 Positive 4%
N° de stock RS 178-7404
Référence fabricantTLE4285GHTSA1
MarqueInfineon
0,365 €
Each (On a Reel of 3000)
Unité
5 V 15mA Fixed SCT-595 Surface Mount 6 V 45 V 5 - -40 °C +150 °C 1 Positive 4%
N° de stock RS 857-8558
Référence fabricantIFX78M05ABTFATMA1
MarqueInfineon
0,191 €
Each (On a Reel of 2500)
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5 V 500mA Fixed TO-252 Surface Mount -0.3 V 35 V 3 - -40 °C +125 °C 1 Positive -
N° de stock RS 857-8554
Référence fabricantIFX7805ABTFATMA1
MarqueInfineon
0,195 €
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5 V 10mA Fixed TO-252 Surface Mount -0.3 V 35 V 3 - -40 °C +125 °C 1 Positive -
N° de stock RS 857-8551
Référence fabricantIFX7805ABTCATMA1
MarqueInfineon
0,334 €
Each (On a Reel of 1000)
Unité
5 V 10mA Fixed D2PAK (TO-263) Surface Mount -0.3 V 35 V 3 - -40 °C +125 °C 1 Positive -