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. 880-5323
Mfr. Part No.LDS3985M33R
R 11.122
Each (In a Pack of 25)
units
- 3.3 V Fixed SOT-23 300mA Surface Mount 2.5 V 6 V 5 1 Positive 1.5 (OFF Mode) μA, 300 (ON Mode) μA - -40 °C
RS stock no. 533-8164
Mfr. Part No.LM2940CT-5.0/NOPB
R 36.95
Each
units
- 5 V Fixed TO-220 1A Through Hole 6.25 V 26 V 3 1 Positive - - 0 °C
RS stock no. 660-6736
Mfr. Part No.LP2985A-33DBVT
R 15.972
Each (In a Pack of 10)
units
- 3.3 V Fixed SOT-23 150mA Surface Mount 2.2 V 16 V 5 1 Positive 0.85mA ±1% -40 °C
RS stock no. 923-3697
Mfr. Part No.LP2985A-33DBVT
R 9.173
Each (On a Reel of 250)
units
- 3.3 V Fixed SOT-23 150mA Surface Mount 2.2 V 16 V 5 1 Positive 0.85mA ±1% -40 °C
RS stock no. 802-2130
Mfr. Part No.NCP1117ST50T3G
R 4.732
Each (In a Pack of 20)
units
- 5 V Fixed SOT-223 1A Surface Mount - 20 V 3+Tab 1 Positive 10mA ±1% 0 °C
RS stock no. 124-5349
Mfr. Part No.NCP1117ST50T3G
R 2.708
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. 102-5679
Mfr. Part No.LM1117IDT-3.3/NOPB
R 22.067
Each (In a Tube of 75)
units
- 3.3 V Fixed TO-252 800mA Surface Mount - 15 V 3 1 Positive - ±1% -40 °C
RS stock no. 686-5774
Mfr. Part No.SP6205EM5-L-3-3/TR
BrandEXAR
R 10.313
Each (In a Pack of 10)
units
- 3.3 V Fixed SOT-23 500mA Surface Mount 2.7 V 5.5 V 5 1 Positive 0.045mA ±2% -40 °C
RS stock no. 686-9212
Mfr. Part No.L4940D2T5-TR
R 24.534
Each (In a Pack of 5)
units
- 5 V Fixed D2PAK 1.5A Surface Mount - 17 V 3 1 Positive 5mA - -40 °C
RS stock no. 168-6558
Mfr. Part No.L4940D2T5-TR
R 12.596
Each (On a Reel of 1000)
units
- 5 V Fixed D2PAK 1.5A Surface Mount - 17 V 3 1 Positive 5mA - -40 °C
RS stock no. 535-8613
Mfr. Part No.LM1117IDT-3.3/NOPB
R 25.352
Each (In a Pack of 5)
units
- 3.3 V Fixed TO-252 800mA Surface Mount - 15 V 3 1 Positive - ±1% -40 °C
RS stock no. 913-4193
Mfr. Part No.SP6205EM5-L-3-3/TR
BrandMaxLinear
R 4.468
Each (On a Reel of 2500)
units
- 3.3 V Fixed SOT-23 500mA Surface Mount 2.7 V 5.5 V 5 1 Positive 0.045mA ±2% -40 °C
RS stock no. 533-9577
Mfr. Part No.LM1117MP-3.3/NOPB
R 19.79
Each
units
- 3.3 V Fixed SOT-223 800mA Surface Mount - 15 V 4 1 - - ±1% 0 °C
RS stock no. 921-6879
Mfr. Part No.LM2937IMP-5.0/NOPB
R 15.302
Each (On a Reel of 1000)
units
- 5 V Fixed SOT-223 400mA Surface Mount 0 V 26 V 3+Tab 1 Positive 20mA 5% -40 °C
RS stock no. 122-3362
Mfr. Part No.AP2204R-3.3TRG1
R 2.315
Each (On a Reel of 1000)
units
- 3.3 V Fixed SOT-89 150mA Surface Mount 2.3 V 24 V 3 1 Positive 50µA - -40 °C
RS stock no. 162-5840
Mfr. Part No.LP2985A-18DBVR
R 4.952
Each (On a Reel of 3000)
units
- 1.8 V Fixed SOT-23 150mA Surface Mount 2.2 V 16 V 5 1 Positive 0.85mA ±1% -40 °C
RS stock no. 169-8949
Mfr. Part No.TS9011SCX RFG
R 2.951
Each (On a Reel of 3000)
units
- 3.3 V Fixed SOT-23 250mA Surface Mount - 12 V 3 1 Positive 0.002mA ±2% -40 °C
RS stock no. 828-7416
Mfr. Part No.AP2204R-3.3TRG1
R 5.601
Each (In a Pack of 50)
units
- 3.3 V Fixed SOT-89 150mA Surface Mount 2.3 V 24 V 3 1 Positive 50µA - -40 °C
RS stock no. 122-3352
Mfr. Part No.AP2127K-1.8TRG1
R 0.805
Each (On a Reel of 3000)
units
- 1.8 V Fixed SOT-23 - Surface Mount 2.5 V 6 V 5 1 Positive 90µA ±2% -40 °C
RS stock no. 398-625
Mfr. Part No.TS9011SCX RFG
R 7.693
Each (In a Pack of 50)
units
- 3.3 V Fixed SOT-23 250mA Surface Mount - 12 V 3 1 Positive 0.002mA ±2% -40 °C