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. 423-557
Mfr. Part No.LT3080EST#PBF
$6.57
Each
units
- 0 → 30 V Adjustable SOT-223 1.1A Surface Mount 1.2 V 36 V 3+Tab 1 Positive - - -40 °C
RS Stock No. 533-9448
Mfr. Part No.LM1086CT-3.3/NOPB
$2.76
Each
units
- 3.3 V Fixed TO-220 1.5A Through Hole 2.6 V 30 V 3 1 Positive - - 0 °C
RS Stock No. 100-5920
Mfr. Part No.LM1086CT-3.3/NOPB
$2.187
Each (In a Tube of 45)
units
- 3.3 V Fixed TO-220 1.5A Through Hole 2.6 V 30 V 3 1 Positive - - 0 °C
RS Stock No. 100-5930
Mfr. Part No.LM1117MP-3.3/NOPB
$0.713
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. 910-1442
Mfr. Part No.MIC5200-5.0YS
BrandMicrochip
$1.52
Each (In a Pack of 10)
units
- 5 V Fixed SOT-223 100mA Surface Mount 2.5 V 26 V 3+Tab 1 Positive - ±1% -40 °C
RS Stock No. 779-9606
Mfr. Part No.LT3032EDE#PBF
$7.975
Each (In a Pack of 2)
units
- ±1.22 → ±20 V Adjustable DFN ±150mA Surface Mount ±2.3 V ±20 V 14 2 Negative 30µA - -40 °C
RS Stock No. 917-3453
Mfr. Part No.LT3080EST#PBF
$4.356
Each (In a Tube of 78)
units
- 0 → 30 V Adjustable SOT-223 1.1A Surface Mount 1.2 V 36 V 3+Tab 1 Positive - - -40 °C
RS Stock No. 168-6517
Mfr. Part No.LD2981CM50TR
$0.459
Each (On a Reel of 3000)
units
- 5 V Fixed SOT-23 100mA Surface Mount 2.5 V 16 V 5 1 Positive 0.08mA - -40 °C
RS Stock No. 170-9150
Mfr. Part No.HT7530-1-SOT89
BrandHoltek
$0.552
Each (On a Reel of 1000)
units
- 3 V Fixed SOT-89 100mA Surface Mount - 30 V 3 1 Positive 4µA ±3% -40 °C
RS Stock No. 885-0727
Mfr. Part No.HT7530-1-SOT89
BrandHoltek
$0.533
Each (In a Pack of 20)
units
- 3 V Fixed SOT-89 100mA Surface Mount - 30 V 3 1 Positive 4µA ±3% -40 °C
RS Stock No. 165-4691
Mfr. Part No.MCP1725-3302E/SN
BrandMicrochip
$0.588
Each (In a Tube of 100)
units
- 3.3 V Fixed SOIC 500mA Surface Mount 2.3 V 6 V 8 1 Positive 0.12mA ±2% -40 °C
RS Stock No. 121-9149
Mfr. Part No.TPS79333DBVR
$0.467
Each (On a Reel of 3000)
units
- 3.3 V Fixed SOT-23 200mA Surface Mount 2.7 V 5.5 V 5 1 Positive 0.17mA ±2% -40 °C
RS Stock No. 889-6070
Mfr. Part No.MCP1754ST-3302E/CB
BrandMicrochip
$0.352
Each (On a Reel of 3000)
units
- 3.3 V Fixed SOT-23A 150mA Surface Mount 3.3 V 16 V 3 1 Positive 56µA 2% -40 °C
RS Stock No. 661-4490
Mfr. Part No.TPS79333DBVR
$1.08
Each (In a Pack of 5)
units
- 3.3 V Fixed SOT-23 200mA Surface Mount 2.7 V 5.5 V 5 1 Positive 0.17mA ±2% -40 °C
RS Stock No. 145-1278
Mfr. Part No.LT3032EDE#PBF
$5.293
Each (In a Tube of 91)
units
- ±1.22 → ±20 V Adjustable DFN ±150mA Surface Mount ±2.3 V ±20 V 14 2 Negative 30µA - -40 °C
RS Stock No. 144-5894
Mfr. Part No.MIC5200-5.0YS
BrandMicrochip
$0.973
Each (In a Tube of 78)
units
- 5 V Fixed SOT-223 100mA Surface Mount 2.5 V 26 V 3+Tab 1 Positive - ±1% -40 °C
RS Stock No. 168-6523
Mfr. Part No.LF50ABDT-TR
$0.631
Each (On a Reel of 2500)
units
- 5 V Fixed DPAK 500mA Surface Mount - 16 V 3 1 Positive 0.5mA ±1% -40 °C
RS Stock No. 647-5006
Mfr. Part No.LP2985IM5-4.0/NOPB
$0.96
Each
units
- 4 V Fixed SOT-23 150mA Surface Mount 2.5 V 16 V 5 1 Positive - ±3% -40 °C
RS Stock No. 165-4199
Mfr. Part No.MIC29302WT
BrandMicrochip
$2.31
Each (In a Tube of 50)
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. 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
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