Low Dropout Voltage Regulators

Low dropout voltage regulators are types of linear regulators that provide an inexpensive way of regulating output voltage with few external components. Linear regulators are used to maintain a steady voltage in electronic devices. Low dropout voltage regulators can regulate output voltage even when it's very close to the supply voltage. They have low noise and good ripple rejection making them crucial to maintaining a stable power supply in any power-management system.


What are low dropout voltage regulators used for?


Low dropout voltage regulators help to maintain system voltage independent of battery. This makes them useful for portable applications, as well as for equipment that needs a stable voltage while minimising the supply. You're likely to find low dropout voltage regulators in devices such as smoke detectors or alarm systems.


Choosing the right low dropout voltage regulator


There are various factors to consider when choosing the right regulator. These include required output voltage, maximum load current, minimum dropout voltage and the type and range of input voltage. Low dropout voltage regulators are the right choice if a more precise output voltage is necessary and there is a low power dissipation.


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Description Price Dropout Voltage at Maximum Current Output Voltage Output Type Package Type Maximum Output Current Mounting Type Minimum Input Voltage Maximum Input Voltage Pin Count Number of Outputs Polarity Quiescent Current Accuracy Minimum Operating Temperature
RS Stock No. 769-5790
Mfr. Part No.NCP59151MN50TYG
HK$16.10
Each
units
- 5 V Fixed DFN 1.5A Surface Mount 2.24 V 13.5 V 8 1 Positive 80mA ±2% -40 °C
RS Stock No. 155-9378
Mfr. Part No.LT1084CT-12#PBF
HK$57.797
Each (In a Tube of 50)
units
- 11.76 12.24 V Fixed TO-220 5A Through Hole - 25 V 3 1 Positive 10mA - 0 °C
RS Stock No. 100-5931
Mfr. Part No.LM1117MP-5.0/NOPB
HK$3.947
Each (On a Reel of 1000)
units
- 5 V Fixed SOT-223 800mA Surface Mount - 15 V 3+Tab 1 Positive - ±1% 0 °C
RS Stock No. 162-8417
Mfr. Part No.TPS73801DCQR
HK$24.379
Each (On a Reel of 2500)
units
- 1.21 → 20 V Adjustable SOT-223 1A Surface Mount 2.2 V 20 V 5+Tab 1 Positive 1µA - -40 °C
RS Stock No. 124-5349
Mfr. Part No.NCP1117ST50T3G
HK$1.313
Each (On a Reel of 4000)
units
- 5 V Fixed SOT-223 2.2A Surface Mount - 20 V 3+Tab 1 Positive 10mA ±1% 0 °C
RS Stock No. 533-9460
Mfr. Part No.LM1086IS-3.3/NOPB
HK$18.84
Each
units
- 3.3 V Fixed D2PAK (TO-263) 1.5A Surface Mount 2.6 V 30 V 3 1 Positive - - -40 °C
RS Stock No. 686-9331
Mfr. Part No.LD1117AS12TR
HK$4.675
Each (In a Pack of 25)
units
- 1.2 V Fixed SOT-223 1.2A Surface Mount - 10 V 3+Tab 1 Positive 5mA ±2% 0 °C
RS Stock No. 121-8914
Mfr. Part No.LM3940IMP-3.3/NOPB
HK$5.879
Each (On a Reel of 1000)
units
- 3.3 V Fixed SOT-223 1A Surface Mount 4.5 V 7.5 V 3+Tab 1 Positive - - -40 °C
RS Stock No. 145-1189
Mfr. Part No.LT1584CT#PBF
HK$78.829
Each (In a Tube of 50)
units
- - Adjustable TO-220 7A Through Hole 2.5 V 7 V 3 1 Positive 8mA - 0 °C
RS Stock No. 805-1740
Mfr. Part No.NCV1117ST18T3G
HK$4.83
Each (In a Pack of 20)
units
- 1.8 V Fixed SOT-223 2.2A Surface Mount - 20 V 3+Tab 1 Positive 10mA ±1% -40 °C
RS Stock No. 102-5684
Mfr. Part No.LM1117MP-2.5/NOPB
HK$4.204
Each (On a Reel of 1000)
units
- 2.5 V Fixed SOT-223 800mA Surface Mount - 15 V 3+Tab 1 Positive - ±1% 0 °C
RS Stock No. 921-0701
Mfr. Part No.AZ1117H-3.3TRE1
HK$2.927
Each (In a Pack of 50)
units
- 3.3 V Fixed SOT-223 1A Surface Mount - 15 V 3+Tab 1 Positive 10mA 1% -40 °C
RS Stock No. 100-5912
Mfr. Part No.LM1084IT-5.0/NOPB
HK$18.453
Each (In a Tube of 45)
units
- 5 V Fixed TO-220 5A Through Hole 2.6 V 25 V 3 1 Positive - - -40 °C
RS Stock No. 100-5922
Mfr. Part No.LM1086IS-3.3/NOPB
HK$15.969
Each (In a Tube of 45)
units
- 3.3 V Fixed D2PAK (TO-263) 1.5A Surface Mount 2.6 V 30 V 3 1 Positive - - -40 °C
RS Stock No. 545-5720
Mfr. Part No.LT1085CT-5#PBF
HK$72.58
Each
units
- 5 V Fixed TO-220 3A Through Hole 4.3 V 25 V 3 1 Positive 5mA ±1% 0 °C
RS Stock No. 162-9096
Mfr. Part No.NCV1117ST18T3G
HK$3.079
Each (On a Reel of 4000)
units
- 1.8 V Fixed SOT-223 2.2A Surface Mount - 20 V 3+Tab 1 Positive 10mA ±1% -40 °C
RS Stock No. 146-0950
Mfr. Part No.AZ1117H-3.3TRE1
HK$0.863
Each (On a Reel of 4000)
units
- 3.3 V Fixed SOT-223 1A Surface Mount - 15 V 3+Tab 1 Positive 10mA 1% -40 °C
RS Stock No. 100-3963
Mfr. Part No.LM2941CT/NOPB
HK$10.709
Each (In a Tube of 45)
units
- 5 → 20 V Adjustable TO-220 1A Through Hole -15 V 26 V 5 1 Positive - - 0 °C
RS Stock No. 545-6408
Mfr. Part No.LT1584CT#PBF
HK$118.71
Each
units
- - Adjustable TO-220 7A Through Hole 2.5 V 7 V 3 1 Positive 8mA - 0 °C
RS Stock No. 534-3021
Mfr. Part No.LM3940IT-3.3/NOPB
HK$19.74
Each
units
- 3.3 V Fixed TO-220 1A Through Hole 4.5 V 7.5 V 3 1 Positive - - -40 °C
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