Low Dropout Voltage Regulators

Low dropout voltage regulators are types of linear voltage 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. 533-9404
Mfr. Part No.LM1085IT-5.0/NOPB
£2.01
Each
Units
- 5 V Fixed TO-220 3A Through Hole 2.6 V 25 V 3 1 Positive - - -40 °C
RS Stock No. 533-9583
Mfr. Part No.LM1117MP-5.0/NOPB
£0.88
Each
Units
- 5 V Fixed SOT-223 800mA Surface Mount - 15 V 3+Tab 1 Positive - ±1% 0 °C
RS Stock No. 100-5931
Mfr. Part No.LM1117MP-5.0/NOPB
£0.384
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. 686-9767
Mfr. Part No.LD1117V33C
£0.399
Each (In a Pack of 10)
Units
- 3.3 V Fixed TO-220 1.3A Through Hole - 15 V 3 1 Positive 5mA ±1% -40 °C
RS Stock No. 168-6597
Mfr. Part No.LD1117V33C
£0.344
Each (In a Tube of 50)
Units
- 3.3 V Fixed TO-220 1.3A Through Hole - 15 V 3 1 Positive 5mA ±1% -40 °C
RS Stock No. 669-5092
Mfr. Part No.MCP1825S-3302E/DB
BrandMicrochip
£0.396
Each (In a Pack of 5)
Units
- 3.3 V Fixed SOT-223 500mA Surface Mount 2.1 V 6 V 3+Tab 1 Positive 0.12mA ±0.5% -40 °C
RS Stock No. 911-5520
Mfr. Part No.MCP1825S-3302E/DB
BrandMicrochip
£0.333
Each (In a Tube of 78)
Units
- 3.3 V Fixed SOT-223 500mA Surface Mount 2.1 V 6 V 3+Tab 1 Positive 0.12mA ±0.5% -40 °C
RS Stock No. 168-6582
Mfr. Part No.LD1085V50
£0.839
Each (In a Tube of 50)
Units
- 5 V Fixed TO-220 3A Through Hole - 30 V 3 1 Positive 5mA ±1% -40 °C
RS Stock No. 686-9690
Mfr. Part No.LD1085V50
£1.038
Each (In a Pack of 5)
Units
- 5 V Fixed TO-220 3A Through Hole - 30 V 3 1 Positive 5mA ±1% -40 °C
RS Stock No. 533-9577
Mfr. Part No.LM1117MP-3.3/NOPB
£0.88
Each
Units
- 3.3 V Fixed SOT-223 800mA Surface Mount - 15 V 4 1 - - ±1% 0 °C
RS Stock No. 100-5930
Mfr. Part No.LM1117MP-3.3/NOPB
£0.394
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. 100-5912
Mfr. Part No.LM1084IT-5.0/NOPB
£1.74
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. 533-9331
Mfr. Part No.LM1084IT-5.0/NOPB
£2.09
Each
Units
- 5 V Fixed TO-220 5A Through Hole 2.6 V 25 V 3 1 Positive - - -40 °C
RS Stock No. 533-9448
Mfr. Part No.LM1086CT-3.3/NOPB
£1.50
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
£1.25
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. 533-5626
Mfr. Part No.LM2940CT-12/NOPB
£1.73
Each
Units
- 12 V Fixed TO-220 1A Through Hole 13.6 V 26 V 3 1 Positive - - 0 °C
RS Stock No. 100-3961
Mfr. Part No.LM2940CT-12/NOPB
£1.44
Each (In a Tube of 45)
Units
- 12 V Fixed TO-220 1A Through Hole 13.6 V 26 V 3 1 Positive - - 0 °C
RS Stock No. 885-0727
Mfr. Part No.HT7530-1-SOT89
BrandHoltek
£0.351
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. 170-9150
Mfr. Part No.HT7530-1-SOT89
BrandHoltek
£0.319
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. 121-8914
Mfr. Part No.LM3940IMP-3.3/NOPB
£0.584
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
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