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 128 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. 751-5186
Mfr. Part No.ZLDO1117G50TA
$0.698
Each (In a Pack of 25)
units
5 V 1A SOT-223 Fixed Surface Mount 2.7 V 18 V 3+Tab - -40 °C +125 °C 1 Positive 2%
RS Stock No. 121-9570
Mfr. Part No.ZLDO1117G50TA
$0.342
Each (On a Reel of 1000)
units
5 V 1A SOT-223 Fixed Surface Mount 2.7 V 18 V 3+Tab - -40 °C +125 °C 1 Positive 2%
RS Stock No. 751-3092
Mfr. Part No.AP7333-15SAG-7
$0.138
Each (On a Tape of 50)
units
1.5 V 300mA SOT-23 Fixed Surface Mount 2 V 6 V 3 - -40 °C +85 °C 1 Positive ±2%
RS Stock No. 169-0663
Mfr. Part No.AP7333-15SAG-7
$0.172
Each (On a Reel of 3000)
units
1.5 V 300mA SOT-23 Fixed Surface Mount 2 V 6 V 3 - -40 °C +85 °C 1 Positive ±2%
RS Stock No. 922-8285
Mfr. Part No.AP1117E33G-13
$0.159
Each (On a Reel of 2500)
units
3.3 V 1A SOT-223 Fixed Surface Mount 6.4 V 18 V 3+Tab - 0 °C +125 °C 1 Positive -
RS Stock No. 751-2890
Mfr. Part No.AP1117E33G-13
$0.545
Each (In a Pack of 50)
units
3.3 V 1A SOT-223 Fixed Surface Mount 6.4 V 18 V 3+Tab - 0 °C +125 °C 1 Positive -
RS Stock No. 122-0372
Mfr. Part No.AP7215-33YG-13
$0.266
Each (On a Reel of 2500)
units
3.3 V 600mA SOT-89 Fixed Surface Mount 3.3 V 5.5 V 3 - -40 °C +125 °C 1 Positive -
RS Stock No. 121-9504
Mfr. Part No.AP7313-15SAG-7
$0.156
Each (On a Reel of 3000)
units
1.5 V 150mA SOT-23 Fixed Surface Mount 2 V 6 V 3 - -40 °C +85 °C 1 Positive ±2%
RS Stock No. 122-3393
Mfr. Part No.AZ1117H-5.0TRE1
$0.091
Each (On a Reel of 4000)
units
5 V 1A SOT-223 Fixed Surface Mount - 15 V 3+Tab - -40 °C +125 °C 1 Positive ±1%
RS Stock No. 751-3058
Mfr. Part No.AP7313-15SAG-7
$0.221
Each (On a Tape of 50)
units
1.5 V 150mA SOT-23 Fixed Surface Mount 2 V 6 V 3 - -40 °C +85 °C 1 Positive ±2%
RS Stock No. 885-5432
Mfr. Part No.AZ1117H-5.0TRE1
$0.149
Each (In a Pack of 50)
units
5 V 1A SOT-223 Fixed Surface Mount - 15 V 3+Tab - -40 °C +125 °C 1 Positive ±1%
RS Stock No. 751-3033
Mfr. Part No.AP7215-33YG-13
$0.574
Each (In a Pack of 25)
units
3.3 V 600mA SOT-89 Fixed Surface Mount 3.3 V 5.5 V 3 - -40 °C +125 °C 1 Positive -
RS Stock No. 166-0463
Mfr. Part No.AP7313-18SRG-7
$0.161
Each (On a Reel of 3000)
units
1.8 V 150mA SOT-23R Fixed Surface Mount 2 V 6 V 3 - -40 °C +85 °C 1 Positive ±2%
RS Stock No. 122-0379
Mfr. Part No.AP7313-33SAG-7
$0.171
Each (On a Reel of 3000)
units
3.3 V 150mA SOT-23 Fixed Surface Mount 2 V 6 V 3 - -40 °C +85 °C 1 Positive ±2%
RS Stock No. 828-3351
Mfr. Part No.ZXTR2008K-13
$0.392
Each (In a Pack of 20)
units
8.2 V 55mA TO-252 Fixed Surface Mount 12 V 100 V 3 2.3W -40 °C +125 °C 1 Positive ±10%
RS Stock No. 166-0434
Mfr. Part No.AP1117E25G-13
$0.172
Each (On a Reel of 2500)
units
2.5 V 1A SOT-223 Fixed Surface Mount 6.4 V 18 V 3+Tab - 0 °C +125 °C 1 Positive -
RS Stock No. 790-4669
Mfr. Part No.ZXTR2005Z-13
$0.396
Each (In a Pack of 10)
units
5 V 38mA SOT-89 Fixed Surface Mount 10 V 100 V 3 1.7W -40 °C +125 °C 1 Positive ±10%
RS Stock No. 828-7555
Mfr. Part No.AS78L05MTR-G1
$0.18
Each (In a Pack of 50)
units
5 V 100mA SOIC Fixed Surface Mount - 30 V 8 750mW -40 °C +125 °C 1 Positive ±5%
RS Stock No. 751-2894
Mfr. Part No.AP1117E50G-13
$0.563
Each (In a Pack of 50)
units
5 V 1A SOT-223 Fixed Surface Mount 6.4 V 18 V 3+Tab - 0 °C +125 °C 1 Positive -
RS Stock No. 751-3055
Mfr. Part No.AP7313-18SRG-7
$0.273
Each (In a Pack of 50)
units
1.8 V 150mA SOT-23R Fixed Surface Mount 2 V 6 V 3 - -40 °C +85 °C 1 Positive ±2%