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. 163-2408
Mfr. Part No.LM2931D-5.0R2G
$0.409
Each (On a Reel of 2500)
units
- 5 V Fixed SOIC 100mA Surface Mount - 40 V 8 1 Positive - ±5% -40 °C
RS Stock No. 398-625
Mfr. Part No.TS9011SCX RFG
$0.341
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
RS Stock No. 686-8938
Mfr. Part No.LF50ABDT-TR
$1.03
Each (In a Pack of 5)
units
- 5 V Fixed DPAK 500mA Surface Mount - 16 V 3 1 Positive 0.5mA ±1% -40 °C
RS Stock No. 910-1395
Mfr. Part No.MIC29302WT
BrandMicrochip
$3.024
Each (In a Pack of 5)
units
- 1.25 → 26 V Adjustable TO-220 3A Through Hole 2.5 V 26 V 5 1 Positive - ±1% -40 °C
RS Stock No. 169-8949
Mfr. Part No.TS9011SCX RFG
$0.193
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. 688-9354
Mfr. Part No.LM2931D-5.0R2G
$0.805
Each (In a Pack of 2)
units
- 5 V Fixed SOIC 100mA Surface Mount - 40 V 8 1 Positive - ±5% -40 °C
RS Stock No. 165-4070
Mfr. Part No.MIC5233-3.3YM5-TR
BrandMicrochip
$1.35
Each (On a Reel of 3000)
units
- 3.3 V Fixed SOT-23 100mA Surface Mount 2.3 V 36 V 5 1 Positive - ±2% -40 °C
RS Stock No. 533-5604
Mfr. Part No.LM2936Z-5.0/NOPB
$1.14
Each
units
- 5 V Fixed TO-92 50mA Through Hole 4 V 40 V 3 1 Positive - ±2% -40 °C
RS Stock No. 785-7207
Mfr. Part No.NCP1117ST33T3G
$0.554
Each (In a Pack of 20)
units
- 3.3 V Fixed SOT-223 1A Surface Mount - 20 V 3+Tab 1 Positive 10mA ±1% 0 °C
RS Stock No. 100-3958
Mfr. Part No.LM2936Z-5.0/NOPB
$1.14
Each (On a Reel of 1800)
units
- 5 V Fixed TO-92 50mA Through Hole 4 V 40 V 3 1 Positive - ±2% -40 °C
RS Stock No. 686-9372
Mfr. Part No.LD1117SC-R
$0.524
Each (In a Pack of 25)
units
- 1.25 → 15 V Adjustable SOT-223 1.3A Surface Mount - 15 V 3+Tab 1 Positive - ±1% -40 °C
RS Stock No. 121-8914
Mfr. Part No.LM3940IMP-3.3/NOPB
$1.00
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. 770-9486
Mfr. Part No.MCP1703A-3302E/DB
BrandMicrochip
$0.90
Each (In a Pack of 6)
units
- 3.3 V Fixed SOT-223 250mA Surface Mount 2.7 V 16 V 3 1 Positive 5µA 2% -40 °C
RS Stock No. 165-7746
Mfr. Part No.LD1117SC-R
$0.186
Each (On a Reel of 2500)
units
- 1.25 → 15 V Adjustable SOT-223 1.3A Surface Mount - 15 V 3+Tab 1 Positive - ±1% -40 °C
RS Stock No. 545-5736
Mfr. Part No.LT1085CT-12#PBF
$10.96
Each
units
- 12 V Fixed TO-220 3A Through Hole 4.3 V 25 V 3 1 Positive 5mA ±1% 0 °C
RS Stock No. 536-1546
Mfr. Part No.LM3940IMP-3.3/NOPB
$2.06
Each
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. 165-8340
Mfr. Part No.AZ1117CH-5.0TRG1
$0.118
Each (On a Reel of 4000)
units
- 5 V Fixed SOT-223 300mA Surface Mount - 15 V 3+Tab 1 Positive 6mA ±1% -20 °C
RS Stock No. 533-5648
Mfr. Part No.LM2941CT/NOPB
$1.90
Each
units
- 5 → 20 V Adjustable TO-220 1A Through Hole -15 V 26 V 5 1 Positive - - 0 °C
RS Stock No. 910-1767
Mfr. Part No.MIC5233-3.3YM5-TR
BrandMicrochip
$1.80
Each (In a Pack of 5)
units
- 3.3 V Fixed SOT-23 100mA Surface Mount 2.3 V 36 V 5 1 Positive - ±2% -40 °C
RS Stock No. 100-3963
Mfr. Part No.LM2941CT/NOPB
$1.802
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
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