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 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庫存編號 398-562
製造零件編號TS78L12CT A3G
HK$1.271
/個 (每包:50個)
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12 V 150mA TO-92 Fixed Through Hole - 35 V 3 - 0 °C +125 °C 1 Positive ±4%
RS庫存編號 169-8945
製造零件編號TS78L12CT A3G
HK$0.78
Each (On a Tape of 2000)
單位
12 V 150mA TO-92 Fixed Through Hole - 35 V 3 - 0 °C +125 °C 1 Positive ±4%
RS庫存編號 398-552
製造零件編號TS78L05CT A3G
HK$1.148
/個 (每包:50個)
單位
5 V 150mA TO-92 Fixed Through Hole - 35 V 3 - 0 °C +125 °C 1 Positive ±4%
RS庫存編號 169-8944
製造零件編號TS78L05CT A3G
HK$0.719
Each (On a Tape of 2000)
單位
5 V 150mA TO-92 Fixed Through Hole - 35 V 3 - 0 °C +125 °C 1 Positive ±4%
RS庫存編號 169-8952
製造零件編號TS78L05CS RLG
HK$1.172
個 (在毎卷:2500)
單位
5 V 150mA SOP Fixed Surface Mount - 35 V 8 - 0 °C +125 °C 1 Positive ±4%
RS庫存編號 146-2238
製造零件編號TS78L09CT A3G
HK$0.648
Each (On a Tape of 2000)
單位
9 V 150mA TO-92 Fixed Through Hole - 35 V 3 - 0 °C +125 °C 1 Positive ±4%
RS庫存編號 398-742
製造零件編號TS7824CZ COG
HK$91.073
/個 (每包:50個)
單位
24 V 1A TO-220 Fixed Through Hole - 40 V 3 - 0 °C +125 °C 1 Positive ±4%
RS庫存編號 169-8946
製造零件編號TS78L12CS RLG
HK$1.172
個 (在毎卷:2500)
單位
12 V 150mA SOP Fixed Surface Mount - 35 V 8 - 0 °C +125 °C 1 Positive ±4%
RS庫存編號 398-736
製造零件編號TS7812CZ COG
HK$2.151
/個 (每包:50個)
單位
12 V 2.2A TO-220 Fixed Through Hole - 35 V 3 - 0 °C +125 °C 1 Positive ±4%
RS庫存編號 146-2240
製造零件編號TS78M12CP ROG
HK$1.402
個 (在毎卷:2500)
單位
12 V 500mA TO-252 Fixed Surface Mount - 35 V 3 - 0 °C +125 °C 1 Positive ±4%
RS庫存編號 398-578
製造零件編號TS78L09CT A3G
HK$1.035
/個 (每包:50個)
單位
9 V 150mA TO-92 Fixed Through Hole - 35 V 3 - 0 °C +125 °C 1 Positive ±4%
RS庫存編號 146-2236
製造零件編號TS78L05ACY RMG
HK$0.799
個 (在毎卷:1000)
單位
5 V 150mA SOT-89 Fixed Surface Mount - 35 V 4 - 0 °C +125 °C 1 Positive ±4%
RS庫存編號 398-697
製造零件編號TS7805CZ COG
HK$2.141
/個 (每包:50個)
單位
5 V 2.2A TO-220 Fixed Through Hole - 35 V 3 - 0 °C +125 °C 1 Positive ±4%
RS庫存編號 398-657
製造零件編號TS78L05CS RLG
HK$1.575
/個 (每包:50個)
單位
5 V 150mA SOP Fixed Surface Mount - 35 V 8 - 0 °C +125 °C 1 Positive ±4%
RS庫存編號 398-641
製造零件編號TS78M12CP ROG
HK$2.082
/個 (每包:50個)
單位
12 V 500mA TO-252 Fixed Surface Mount - 35 V 3 - 0 °C +125 °C 1 Positive ±4%
RS庫存編號 398-568
製造零件編號TS78L12CS RLG
HK$1.649
/個 (每包:50個)
單位
12 V 150mA SOP Fixed Surface Mount - 35 V 8 - 0 °C +125 °C 1 Positive ±4%
RS庫存編號 169-8951
製造零件編號TS78M05CP ROG
HK$1.958
個 (在毎卷:2500)
單位
5 V 500mA TO-252 Fixed Surface Mount - 35 V 3 - 0 °C +125 °C 1 Positive ±4%
RS庫存編號 398-524
製造零件編號TS78L05ACY RMG
HK$2.023
/個 (每包:50個)
單位
5 V 150mA SOT-89 Fixed Surface Mount - 35 V 4 - 0 °C +125 °C 1 Positive ±4%
RS庫存編號 398-647
製造零件編號TS78M05CP ROG
HK$2.23
/個 (每包:50個)
單位
5 V 500mA TO-252 Fixed Surface Mount - 35 V 3 - 0 °C +125 °C 1 Positive ±4%