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 756-3915
製造零件編號TA7815F(TE16L1,NQ)
BrandToshiba
HK$5.476
/個 (每包:5個)
單位
15.75 V 1A HSOP Fixed Surface Mount 23 V 33 V 3 - -30 °C +150 °C 1 Positive ±4%
RS庫存編號 756-3924
製造零件編號TA7824F(TE16L1,NQ)
BrandToshiba
HK$4.66
/個 (每包:5個)
單位
25.2 V 1A HSOP Fixed Surface Mount 33 V 40 V 3 - -30 °C +150 °C 1 Positive ±4%
RS庫存編號 756-2798
製造零件編號TA48M025F(T6L1,SNQ
BrandToshiba
HK$7.47
/個 (每包:10個)
單位
2.625 V 500mA HSOP Fixed Surface Mount 4.5 V 29 V 3 - -40 °C +150 °C 1 Positive ±5%
RS庫存編號 756-3911
製造零件編號TA7812F(TE16L1,NQ)
BrandToshiba
HK$5.438
/個 (每包:5個)
單位
12.6 V 1A HSOP Fixed Surface Mount 19 V 33 V 3 - -30 °C +150 °C 1 Positive ±4%
RS庫存編號 756-2808
製造零件編號TA48M033F(T6L1,SNQ
BrandToshiba
HK$7.308
/個 (每包:5個)
單位
3.465 V 500mA HSOP Fixed Surface Mount 5.3 V 29 V 3 - -40 °C +150 °C 1 Positive ±5%
RS庫存編號 260-209
製造零件編號TA78L07F(F)
BrandToshiba
HK$3.976
/個 (每包:10個)
單位
7 V 150mA HSOP Fixed Surface Mount - 35 V 4 0.5W -30 °C +85 °C 1 Positive -
RS庫存編號 756-3927
製造零件編號TA78DS05AF(TE12L,F
BrandToshiba
HK$7.566
/個 (每包:5個)
單位
5.25 V 30mA HSOP Fixed Surface Mount 14 V 29 V 3 - -40 °C +85 °C 1 Positive ±5%
RS庫存編號 542-0544
製造零件編號TA79L015P(F)
BrandToshiba
HK$4.95
/個 (每包:5個)
單位
-15 V 150mA SSIP Fixed Through Hole - -35 V 3 0.8W -30 °C +85 °C 1 Negative -
RS庫存編號 260-221
製造零件編號TA78L09F(F)
BrandToshiba
HK$4.254
/個 (每包:10個)
單位
9 V 150mA HSOP Fixed Surface Mount - 35 V 4 0.5W -30 °C +85 °C 1 Positive -
RS庫存編號 756-3933
製造零件編號TA78M12F(TE16L1,NQ
BrandToshiba
HK$4.282
/個 (每包:5個)
單位
12.6 V 500mA HSOP Fixed Surface Mount 19 V 35 V 3 - -30 °C +150 °C 1 Positive ±4%
RS庫存編號 756-3930
製造零件編號TA78M05F(TE16L1,NQ
BrandToshiba
HK$4.282
/個 (每包:5個)
單位
5.25 V 500mA HSOP Fixed Surface Mount 10 V 35 V 3 - -30 °C +150 °C 1 Positive ±4%
RS庫存編號 756-3918
製造零件編號TA7805F(TE16L1,NQ)
BrandToshiba
HK$5.438
/個 (每包:5個)
單位
5.25 V 1A HSOP Fixed Surface Mount 10 V 33 V 3 - -30 °C +150 °C 1 Positive ±4%
RS庫存編號 756-2801
製造零件編號TA48M05F(T6L1,SNQ)
BrandToshiba
HK$7.308
/個 (每包:5個)
單位
5.25 V 500mA HSOP Fixed Surface Mount 7 V 29 V 3 - -40 °C +150 °C 1 Positive ±5%
RS庫存編號 260-192
製造零件編號TA78L06F(F)
BrandToshiba
HK$4.925
/個 (每包:10個)
單位
6 V 150mA HSOP Fixed Surface Mount - 35 V 4 0.5W -30 °C +85 °C 1 Positive -
RS庫存編號 540-0871
製造零件編號TA78L12S(F)
BrandToshiba
HK$3.94
/個 (每包:5個)
單位
12 V 100mA TO-92 Fixed Through Hole - 35 V 3 0.6W -30 °C +85 °C 1 Positive -
RS庫存編號 260-243
製造零件編號TA78L15F(F)
BrandToshiba
HK$4.397
/個 (每包:10個)
單位
15 V 150mA HSOP Fixed Surface Mount - 35 V 4 0.5W -30 °C +85 °C 1 Positive -