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 169-8181
製造零件編號NJM7810DL1A-TE1
HK$3.20
個 (在毎卷:3000)
單位
10 V 1.5A TO-252 Fixed Surface Mount - 35 V 3 1W -40 °C +85 °C 1 Positive 4%
RS庫存編號 713-9486
製造零件編號NJM7810DL1A-TE1
HK$9.81
/個 (每包:5個)
單位
10 V 1.5A TO-252 Fixed Surface Mount - 35 V 3 1W -40 °C +85 °C 1 Positive 4%
RS庫存編號 169-8146
製造零件編號NJM7909FA
HK$4.389
毎管:100 個
單位
-9 V 1.5A TO-220F Fixed Through Hole - -35 V 3 16W -40 °C +85 °C 1 Negative -
RS庫存編號 178-2327
製造零件編號NJM2397F
HK$7.123
毎管:50 個
單位
1.5 → 20 V 1.5A TO-220F Adjustable Through Hole 3.8 V 35 V 4 - -40 °C +85 °C 1 Positive -
RS庫存編號 713-9509
製造零件編號NJM78L03UA-TE1
HK$7.758
/個 (每包:5個)
單位
3 V 100mA SOT-89 Fixed Surface Mount - 30 V 3 0.3W -40 °C +85 °C 1 Positive -
RS庫存編號 178-2264
製造零件編號NJM7815FA
HK$5.08
個 (以毎盒:25)
單位
- - - - - - - - - - - - - -
RS庫存編號 178-2328
製造零件編號NJM78M12FA
HK$4.201
個 (以毎袋:100)
單位
- - - - - - - - - - - - - -
RS庫存編號 169-8183
製造零件編號NJM78L05UA-TE1
HK$1.808
個 (在毎卷:1000)
單位
5 V 100mA SOT-89 Fixed Surface Mount - 30 V 3 0.3W -40 °C +85 °C 1 Positive -
RS庫存編號 178-2338
製造零件編號NJM79M15FA
HK$4.558
個 (以毎袋:100)
單位
- - - - - - - - - - - - - -
RS庫存編號 713-9502
製造零件編號NJM78L05UA-TE1
HK$8.26
/個 (每包:5個)
單位
5 V 100mA SOT-89 Fixed Surface Mount - 30 V 3 0.3W -40 °C +85 °C 1 Positive -
RS庫存編號 713-9546
製造零件編號NJM78M06DL1A-TE1
HK$4.874
/個 (每包:5個)
單位
6 V 500mA TO-252 Fixed Surface Mount - 35 V 3 1W -40 °C +85 °C 1 Positive -
RS庫存編號 713-9559
製造零件編號NJM78M09DL1A-TE1
HK$5.398
/個 (每包:5個)
單位
9 V 500mA TO-252 Fixed Surface Mount - 35 V 3 1W -40 °C +85 °C 1 Positive -
RS庫存編號 173-2230
製造零件編號NJM79L03UA-TE1
HK$2.00
個 (在毎卷:2000)
單位
-3 V 100mA SOT-89 Fixed Surface Mount - -30 V 3 0.35W -40 °C +85 °C 1 Negative -
RS庫存編號 169-8177
製造零件編號NJM7806DL1A-TE1
HK$3.20
個 (在毎卷:3000)
單位
6 V 1.5A TO-252 Fixed Surface Mount - 35 V 3 1W -40 °C +85 °C 1 Positive -
RS庫存編號 713-9596
製造零件編號NJM79M09DL1A-TE1
HK$5.014
/個 (每包:5個)
單位
-9 V 500mA TO-252 Fixed Surface Mount - -35 V 3 7.5W -40 °C +85 °C 1 Negative -
RS庫存編號 713-9423
製造零件編號NJM317DL1-TE1
HK$5.27
/個 (每包:5個)
單位
1.25 → 37 V 2.2A TO-252 Adjustable Surface Mount 4.25 V 40 V 3 1W -40 °C +85 °C 1 Positive -
RS庫存編號 178-2259
製造零件編號NJM7818FA
HK$5.078
毎管:20 個
單位
- - - - - - - - - - - - - -
RS庫存編號 713-9477
製造零件編號NJM7809DL1A-TE1
HK$9.81
/個 (每包:5個)
單位
9 V 1.5A TO-252 Fixed Surface Mount - 35 V 3 1W -40 °C +85 °C 1 Positive -
RS庫存編號 178-2265
製造零件編號NJM7806FA
HK$5.08
毎管:25 個
單位
- - - - - - - - - - - - - -
RS庫存編號 178-2270
製造零件編號NJM7909FA
HK$5.077
毎管:50 個
單位
-9 V 1.5A TO-220F Fixed Through Hole - -35 V 3 16W -40 °C +85 °C 1 Negative -