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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detalji proizvoda Proizvođač Output Voltage Maximum Output Current Package Type Output Type Mounting Type Minimum Input Voltage Maximum Input Voltage Pin Count Power Rating Minimum Operating Temperature Maximum Operating Temperature Number of Outputs Polarity Series Dimensions Typical Dropout Voltage @ Current Height Load Regulation Line Regulation Width Quiescent Current Length Reference Voltage Dropout Voltage Measurement Current Accuracy
-15 V LDO Regulator, 1A, 1-Channel Negative 3-Pin, D2PAK MC7915ACD2TG ON Semiconductor -15 V 1A D2PAK Fixed Surface Mount -16.3 V -35 V 3 - 0 °C +125 °C 1 Negative MC7900 10.23 x 9.34 x 4.32mm 1.3 V @ 1 A 4.32mm 150 mV 150 mV 9.34mm - 10.23mm - 1 A -
-15 V LDO Regulator, 1A, 1-Channel Negative 3-Pin, D2PAK MC7915CD2TG ON Semiconductor -15 V 1A D2PAK Fixed Surface Mount -16.3 V -35 V 3 - 0 °C +125 °C 1 Negative MC7900 10.23 x 9.34 x 4.32mm 1.3 V @ 1 A 4.32mm 300 mV 300 mV 9.34mm - 10.23mm - 1 A -
-15 V LDO Regulator, 1A, 1-Channel Negative 3-Pin, TO-220 MC7915ACTG ON Semiconductor -15 V 1A TO-220 Fixed Through Hole -16.3 V -35 V 3 - 0 °C +125 °C 1 Negative MC7900 10.28 x 4.82 x 15.75mm 1.3 V @ 1 A 15.75mm 150 mV 150 mV 4.82mm - 10.28mm - 1 A -
-15 V LDO Regulator, 500mA, 1-Channel Negative 3-Pin, TO-220 MC79M15CTG ON Semiconductor -15 V 500mA TO-220 Fixed Through Hole -16.1 V -35 V 3 - 0 °C +125 °C 1 Negative MC79M00 10.28 x 4.82 x 15.75mm 1.1 V @ 500 mA 15.75mm 240 mV 80 mV 4.82mm - 10.28mm - 500 mA -
-24 V LDO Regulator, 1A, 1-Channel Negative 3-Pin, TO-220 MC7924CTG ON Semiconductor -24 V 1A TO-220 Fixed Through Hole -25.3 V -40 V 3 - 0 °C +125 °C 1 Negative MC7900 10.28 x 4.82 x 15.75mm 1.3 V @ 1 A 15.75mm 480 mV 470 mV 4.82mm - 10.28mm - 1 A -
-5 V LDO Regulator, 1A, 1-Channel Negative 3-Pin, TO-220 MC7905ACTG ON Semiconductor -5 V 1A TO-220 Fixed Through Hole -6.3 V -35 V 3 - 0 °C +125 °C 1 Negative MC7900 10.28 x 4.82 x 15.75mm 1.3 V @ 1 A 15.75mm 100 mV 50 mV 4.82mm - 10.28mm - 1 A -
-8 V LDO Regulator, 1A, 1-Channel Negative 3-Pin, TO-220 MC7908CTG ON Semiconductor -8 V 1A TO-220 Fixed Through Hole -9.3 V -35 V 3 - 0 °C +125 °C 1 Negative MC7900 10.28 x 4.82 x 15.75mm 1.3 V @ 1 A 15.75mm 160 mV 160 mV 4.82mm - 10.28mm - 1 A -
-8 V LDO Regulator, 500mA, 1-Channel Negative 3-Pin, DPAK MC79M08BDTG ON Semiconductor -8 V 500mA DPAK Fixed Surface Mount -9.1 V -35 V 3 - -40 °C +125 °C 1 Negative MC79M00 6.73 x 6.22 x 2.25mm 1.1 V @ 500 mA 2.25mm 100 mV 80 mV 6.22mm - 6.73mm - 500 mA -
1.2 → 37 V LDO Regulator, 500mA, 1-Channel, Adjustable 3-Pin, TO-220 LM317MTG ON Semiconductor 1.2 → 37 V 500mA TO-220 Adjustable Through Hole 3.1 V 40 V 3 - 0 °C +125 °C 1 Positive - 10.28 x 4.82 x 15.75mm - 15.75mm 70 mV 0.07 %/V 4.82mm - 10.28mm 1.25V - -
1.2 → 37 V Linear Voltage Regulator, 500mA, 1-Channel, Adjustable 3-Pin, DPAK LM317MABDTG ON Semiconductor 1.2 → 37 V 500mA DPAK Adjustable Surface Mount 3.1 V 40 V 3 - -40 °C +125 °C 1 Positive - 6.73 x 6.22 x 2.25mm 2.1 V @ 500 mA 2.25mm 25 mV 0.04 %/V 6.22mm - 6.73mm 1.2 → 1.3V 500 mA -
1.2 → 37 V Linear Voltage Regulator, 500mA, 1-Channel, Adjustable 3-Pin, DPAK LM317MABDTG ON Semiconductor 1.2 → 37 V 500mA DPAK Adjustable Surface Mount 3.1 V 40 V 3 - -40 °C +125 °C 1 Positive - 6.73 x 6.22 x 2.25mm 2.1 V @ 500 mA 2.25mm 25 mV 0.04 %/V 6.22mm - 6.73mm 1.2 → 1.3V 500 mA -
12 V LDO Regulator, 1A, 1-Channel 3-Pin, TO-220 MC7812ACTG ON Semiconductor 12 V 1A TO-220 Fixed Through Hole 14 V 35 V 3 - 0 °C +125 °C 1 Positive - 10.28 x 4.82 x 15.75mm 2 V @ 1 A 15.75mm 25 mV 120 mV 4.82mm 6mA 10.28mm - 1 A -
12 V Linear Voltage Regulator, 1A, 1-Channel 3-Pin, DPAK MC7812BDTRKG ON Semiconductor 12 V 1A DPAK Fixed Surface Mount 14 V 35 V 3 - -40 °C +125 °C 1 Positive - 6.73 x 6.22 x 2.25mm 2 V dc @ 1 A 2.25mm 240 mV 240 mV 6.22mm 6.5mA 6.73mm - 1 A -
12 V Linear Voltage Regulator, 1A, 1-Channel 3-Pin, DPAK MC7812BDTRKG ON Semiconductor 12 V 1A DPAK Fixed Surface Mount 14 V 35 V 3 - -40 °C +125 °C 1 Positive - 6.73 x 6.22 x 2.25mm 2 V dc @ 1 A 2.25mm 240 mV 240 mV 6.22mm 6.5mA 6.73mm - 1 A -
15 V LDO Regulator, 100mA, 1-Channel 8-Pin, SOIC MC78L15ABDG ON Semiconductor 15 V 100mA SOIC Fixed Surface Mount 16.7 V 35 V 8 - -40 °C +125 °C 1 Positive MC78L00A 5 x 4 x 1.5mm 1.7 V @ 40 mA 1.5mm 150 mV 300 mV 4mm - 5mm - 40 mA -
15 V LDO Regulator, 1A, 1-Channel 3-Pin, D2PAK MC7815ACD2TG ON Semiconductor 15 V 1A D2PAK Fixed Surface Mount 17 V 35 V 3 - 0 °C +125 °C 1 Positive - 10.23 x 9.34 x 4.32mm 2 V @ 1 A 4.32mm 25 mV 22 mV 9.34mm 6mA 10.23mm - 1 A -
5 V LDO Regulator, 500mA, 1-Channel, ±2% 3-Pin, TO-220 MC78M05ABTG ON Semiconductor 5 V 500mA TO-220 Fixed Through Hole 7 V 35 V 3 - -40 °C +125 °C 1 Positive MC78M00A 10.28 x 4.82 x 15.75mm 2 V @ 350 mA 15.75mm 100 mV 50 mV 4.82mm 0.8mA 10.28mm - 350 mA ±2%
8 V LDO Regulator, 1A, 1-Channel 3-Pin, DPAK MC7808BDTG ON Semiconductor 8 V 1A DPAK Fixed Surface Mount 10 V 35 V 3 - -40 °C +125 °C 1 Positive - 6.73 x 6.22 x 2.25mm 2 V @ 1 A 2.25mm 160 mV 160 mV 6.22mm 8mA 6.73mm - 1 A -
ON Semiconductor, -5 V Linear Voltage Regulator, 350mA, 1-Channel Negative 4-Pin, TO-220 MC79M05CTG ON Semiconductor -5 V 350mA TO-220 Fixed Through Hole -6.1 V -35 V dc 4 - 0 °C +125 °C 1 Negative MC79M00 10.28 x 4.82 x 15.75mm 1.1 V dc @ 500 mA 15.75mm 100 mV 50 mV 4.82mm - 10.28mm - 500 mA -
ON Semiconductor, -5 V Linear Voltage Regulator, 350mA, 1-Channel Negative 4-Pin, TO-220 MC79M05CTG ON Semiconductor -5 V 350mA TO-220 Fixed Through Hole -6.1 V -35 V dc 4 - 0 °C +125 °C 1 Negative MC79M00 10.28 x 4.82 x 15.75mm 1.1 V dc @ 500 mA 15.75mm 100 mV 50 mV 4.82mm - 10.28mm - 500 mA -
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