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. 102-5680
Mfr. Part No.LM1117IMP-3.3/NOPB
SGD0.743
Each (On a Reel of 1000)
units
- 3.3 V Fixed SOT-223 800mA Surface Mount - 15 V 3+Tab 1 Positive - ±1% -40 °C
RS Stock No. 647-4996
Mfr. Part No.LP2985IM5-5.0/NOPB
SGD0.94
Each
units
- 5 V Fixed SOT-23 150mA Surface Mount 2.5 V 16 V 5 1 Positive - ±3% -40 °C
RS Stock No. 145-6887
Mfr. Part No.TPS71812-33DRVT
SGD1.663
Each (On a Reel of 250)
units
- 1.2 V, 3.3 V Fixed SON 200mA Surface Mount 2.7 V 6.5 V 6 2 Positive 0.09mA ±2.5% -40 °C
RS Stock No. 153-3423
Mfr. Part No.LT1086CT-12#PBF
SGD4.755
Each (In a Tube of 50)
units
- 12 V Fixed TO-220 1.5A Through Hole - 25 V 3 1 Positive 5mA - 0 °C
RS Stock No. 534-3021
Mfr. Part No.LM3940IT-3.3/NOPB
SGD2.40
Each
units
- 3.3 V Fixed TO-220 1A Through Hole 4.5 V 7.5 V 3 1 Positive - - -40 °C
RS Stock No. 100-5930
Mfr. Part No.LM1117MP-3.3/NOPB
SGD0.729
Each (On a Reel of 1000)
units
- 3.3 V Fixed SOT-223 800mA Surface Mount - 15 V 3+Tab 1 Positive - ±1% 0 °C
RS Stock No. 122-3358
Mfr. Part No.AP2204K-ADJTRG1
SGD0.157
Each (On a Reel of 3000)
units
- 1.24 → 22 V Adjustable SOT-23 150mA Surface Mount 2.3 V 24 V 5 1 Positive 50µA - -40 °C
RS Stock No. 828-7404
Mfr. Part No.AP2204K-ADJTRG1
SGD0.222
Each (In a Pack of 50)
units
- 1.24 → 22 V Adjustable SOT-23 150mA Surface Mount 2.3 V 24 V 5 1 Positive 50µA - -40 °C
RS Stock No. 620-1861
Mfr. Part No.TPS79501DCQ
SGD3.358
Each (In a Pack of 5)
units
- 1.2 → 5.5 V Adjustable SOT-223 500mA Surface Mount 2.7 V 5.5 V 5+Tab 1 Positive 0.265mA ±3% -40 °C
RS Stock No. 785-2653
Mfr. Part No.NCV5501DT50RKG
SGD0.85
Each (In a Pack of 5)
units
- 5 V Fixed DPAK 500mA Surface Mount 5.7 V 16 V 3 1 Positive - 2.9% -40 °C
RS Stock No. 669-4869
Mfr. Part No.MCP1701AT-3302I/CB
BrandMicrochip
SGD1.267
Each (In a Pack of 10)
units
- 3.3 V Fixed SOT-23A 150mA Surface Mount - 10 V 3 1 Positive 0.002mA ±2% -40 °C
RS Stock No. 102-5701
Mfr. Part No.LM2940T-12.0/NOPB
SGD1.434
Each (In a Tube of 45)
units
- 12 V Fixed TO-220 1A Through Hole 13.6 V 26 V 3 1 Positive - - -40 °C
RS Stock No. 162-7853
Mfr. Part No.TLV70433DBVT
SGD0.557
Each (On a Reel of 250)
units
- 3.3 V Fixed SOT-23 150mA Surface Mount 2.5 V 24 V 5 1 Positive 3.2µA 2% -40 °C
RS Stock No. 537-8730
Mfr. Part No.LP38691DT-3.3/NOPB
SGD2.128
Each (In a Pack of 5)
units
- 3.3 V Fixed TO-252 500mA Surface Mount 2.7 V 10 V 3 1 Positive - ±2% -40 °C
RS Stock No. 121-8741
Mfr. Part No.LM1085IT-12/NOPB
SGD2.398
Each (In a Tube of 45)
units
- 12 V Fixed TO-220 3A Through Hole 2.6 V 18 V 3 1 Positive - - -40 °C
RS Stock No. 533-9381
Mfr. Part No.LM1085IT-12/NOPB
SGD3.08
Each
units
- 12 V Fixed TO-220 3A Through Hole 2.6 V 18 V 3 1 Positive - - -40 °C
RS Stock No. 779-9423
Mfr. Part No.LT1763CS8-5#PBF
SGD5.215
Each (In a Pack of 2)
units
- 5 V Fixed SOIC 500mA Surface Mount 1.8 V 20 V 8 1 Positive 30µA - -40 °C
RS Stock No. 100-3962
Mfr. Part No.LM2940T-5.0/NOPB
SGD1.707
Each (In a Tube of 45)
units
- 5 V Fixed TO-220 1A Through Hole 6.25 V 26 V 3 1 Positive - - -40 °C
RS Stock No. 145-6669
Mfr. Part No.TPS79501DCQ
SGD3.378
Each (In a Tube of 78)
units
- 1.2 → 5.5 V Adjustable SOT-223 500mA Surface Mount 2.7 V 5.5 V 5+Tab 1 Positive 0.265mA ±3% -40 °C
RS Stock No. 162-9537
Mfr. Part No.NCP551SN33T1G
SGD0.357
Each (On a Reel of 3000)
units
- 3.3 V Fixed TSOP 150mA Surface Mount 0 V 12 V 5 1 Positive 8µA 2% -40 °C
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