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 378 products
Results per page
Description Price 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 Accuracy
RS Stock No. 714-0792
Mfr. Part No.LM317T
HK$4.179
Each (In a Pack of 10)
units
1.2 → 37 V 1.5A TO-220 Adjustable Through Hole 3 V 40 V 3 - 0 °C +125 °C 1 Positive -
RS Stock No. 168-6809
Mfr. Part No.LM317T
HK$1.873
Each (In a Tube of 50)
units
1.2 → 37 V 1.5A TO-220 Adjustable Through Hole 3 V 40 V 3 - 0 °C +125 °C 1 Positive -
RS Stock No. 298-8621
Mfr. Part No.L7915CV
HK$4.69
Each
units
-15 V 1.5A TO-220 Fixed Through Hole - -35 V 3 - 0 °C +150 °C 1 Negative -
RS Stock No. 168-6067
Mfr. Part No.L7915CV
HK$3.141
Each (In a Tube of 50)
units
-15 V 1.5A TO-220 Fixed Through Hole - -35 V 3 - 0 °C +150 °C 1 Negative -
RS Stock No. 168-6061
Mfr. Part No.L7815CV
HK$3.207
Each (In a Tube of 50)
units
15 V 1.5A TO-220 Fixed Through Hole - 35 V 3 - 0 °C +150 °C 1 Positive -
RS Stock No. 298-8558
Mfr. Part No.L7815CV
HK$8.74
Each
units
15 V 1.5A TO-220 Fixed Through Hole - 35 V 3 - 0 °C +150 °C 1 Positive -
RS Stock No. 918-1971
Mfr. Part No.L7805CV
HK$3.207
Each (In a Tube of 50)
units
5 V 1.5A TO-220 Fixed Through Hole - 40 V 3 - 0 °C +125 °C 1 Positive -
RS Stock No. 178-5183
Mfr. Part No.L78L15ACZ
HK$0.792
Each (On a Reel of 2500)
units
- - - - - - - - - - - - - -
RS Stock No. 793-1346
Mfr. Part No.L7805CV-DG
HK$3.563
Each (In a Pack of 10)
units
5 V 1.5A TO-220 Fixed Through Hole - 35 V 3 - 0 °C +125 °C 1 - -
RS Stock No. 102-9429
Mfr. Part No.L7805CV-DG
HK$2.168
Each (In a Tube of 50)
units
5 V 1.5A TO-220 Fixed Through Hole - 35 V 3 - 0 °C +125 °C 1 - -
RS Stock No. 298-8564
Mfr. Part No.L7824CV
HK$8.74
Each
units
24 V 1.5A TO-220 Fixed Through Hole - 40 V 3 - 0 °C +150 °C 1 Positive -
RS Stock No. 168-6062
Mfr. Part No.L7824CV
HK$1.873
Each (In a Tube of 50)
units
24 V 1.5A TO-220 Fixed Through Hole - 40 V 3 - 0 °C +150 °C 1 Positive -
RS Stock No. 714-7774
Mfr. Part No.L78L15ACZ
HK$1.546
Each (In a Pack of 50)
units
15 V 100mA TO-92 Fixed Through Hole - 35 V 3 - 0 °C +150 °C 1 Positive ±5%
RS Stock No. 168-6047
Mfr. Part No.LM217T
HK$4.10
Each (In a Tube of 50)
units
1.2 → 37 V 1.5A TO-220 Adjustable Through Hole - - 3 - -25 °C +150 °C 1 Positive -
RS Stock No. 189-1015
Mfr. Part No.LM217T
HK$5.94
Each
units
1.2 → 37 V 1.5A TO-220 Adjustable Through Hole - - 3 - -25 °C +150 °C 1 Positive -
RS Stock No. 168-6572
Mfr. Part No.L7815CD2T-TR
HK$2.656
Each (On a Reel of 1000)
units
15 V 1.5A D2PAK Fixed Surface Mount - 35 V 3 - 0 °C +150 °C 1 Positive -
RS Stock No. 686-9397
Mfr. Part No.L7815CD2T-TR
HK$5.187
Each (In a Pack of 10)
units
15 V 1.5A D2PAK Fixed Surface Mount - 35 V 3 - 0 °C +150 °C 1 Positive -
RS Stock No. 168-6059
Mfr. Part No.L7805ACV
HK$3.194
Each (In a Tube of 50)
units
5 V 1A TO-220 Fixed Through Hole - 35 V 3 - 0 °C +150 °C 1 Positive 2%
RS Stock No. 298-8508
Mfr. Part No.L7805ACV
HK$4.47
Each
units
5 V 1A TO-220 Fixed Through Hole - 35 V 3 - 0 °C +150 °C 1 Positive 2%
RS Stock No. 860-7286
Mfr. Part No.LM317BT
HK$4.068
Each (In a Pack of 10)
units
1.2 → 37 V 2.2A TO-220 Adjustable Through Hole - 40 V 3 - -40 °C +125 °C 1 Positive -