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. 911-5697
Mfr. Part No.MCP1700-3302E/TO
BrandMicrochip
£0.215
Each (In a Bag of 1000)
Units
- 3.3 V Fixed TO-92 250mA Through Hole 2.3 V 6 V 3 1 Positive 0.0016mA ±2% -40 °C
RS Stock No. 403-888
Mfr. Part No.MCP1700-3302E/TO
BrandMicrochip
£0.285
Each (In a Pack of 10)
Units
- 3.3 V Fixed TO-92 250mA Through Hole 2.3 V 6 V 3 1 Positive 0.0016mA ±2% -40 °C
RS Stock No. 887-7429
Mfr. Part No.MCP1700T-3302E/TT
BrandMicrochip
£0.215
Each (On a Reel of 3000)
Units
- 3.3 V Fixed SOT-23 250mA Surface Mount 2.3 V 6 V 3 1 Positive 0.0016mA ±2% -40 °C
RS Stock No. 698-9044
Mfr. Part No.MCP1700T-3302E/TT
BrandMicrochip
£1.00
Each
Units
- 3.3 V Fixed SOT-23 250mA Surface Mount 2.3 V 6 V 3 1 Positive 0.0016mA ±2% -40 °C
RS Stock No. 100-5903
Mfr. Part No.LM2940CT-5.0/NOPB
£0.634
Each (In a Tube of 450)
Units
- 5 V Fixed TO-220 1A Through Hole 6.25 V 26 V 3 1 Positive - - 0 °C
RS Stock No. 533-8164
Mfr. Part No.LM2940CT-5.0/NOPB
£2.01
Each
Units
- 5 V Fixed TO-220 1A Through Hole 6.25 V 26 V 3 1 Positive - - 0 °C
RS Stock No. 102-5680
Mfr. Part No.LM1117IMP-3.3/NOPB
£0.389
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. 535-8635
Mfr. Part No.LM1117IMP-3.3/NOPB
£0.962
Each (In a Pack of 5)
Units
- 3.3 V Fixed SOT-223 800mA Surface Mount - 15 V 3+Tab 1 Positive - ±1% -40 °C
RS Stock No. 533-9381
Mfr. Part No.LM1085IT-12/NOPB
£2.01
Each
Units
- 12 V Fixed TO-220 3A Through Hole 2.6 V 18 V 3 1 Positive - - -40 °C
RS Stock No. 121-8741
Mfr. Part No.LM1085IT-12/NOPB
£1.228
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. 170-9148
Mfr. Part No.HT7533-1-SOT89
BrandHoltek
£0.245
Each (On a Reel of 1000)
Units
- 3.3 V Fixed SOT-89 100mA Surface Mount - 30 V 3 1 Positive 4µA ±3% -40 °C
RS Stock No. 885-0721
Mfr. Part No.HT7533-1-SOT89
BrandHoltek
£0.351
Each (In a Pack of 20)
Units
- 3.3 V Fixed SOT-89 100mA Surface Mount - 30 V 3 1 Positive 4µA ±3% -40 °C
RS Stock No. 168-6804
Mfr. Part No.LD1117S33TR
£0.095
Each (On a Reel of 2500)
Units
- 3.3 V Fixed SOT-223 1.3A Surface Mount - 15 V 3+Tab 1 Positive 5mA ±1% 0 °C
RS Stock No. 714-0697
Mfr. Part No.LD1117S33TR
£0.295
Each (In a Pack of 10)
Units
- 3.3 V Fixed SOT-223 1.3A Surface Mount - 15 V 3+Tab 1 Positive 5mA ±1% 0 °C
RS Stock No. 100-3962
Mfr. Part No.LM2940T-5.0/NOPB
£0.98
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
New
RS Stock No. 178-1433
Mfr. Part No.LF33CV
£0.578
Each (In a Tube of 50)
Units
- 3.3 V Fixed TO-220 500mA Through Hole - 16 V 3 1 Positive 0.5mA ±2% -40 °C
RS Stock No. 533-5632
Mfr. Part No.LM2940T-5.0/NOPB
£2.01
Each
Units
- 5 V Fixed TO-220 1A Through Hole 6.25 V 26 V 3 1 Positive - - -40 °C
RS Stock No. 355-4128
Mfr. Part No.LF33CV
£2.02
Each
Units
- 3.3 V Fixed TO-220 500mA Through Hole - 16 V 3 1 Positive 0.5mA ±2% -40 °C
RS Stock No. 168-6058
Mfr. Part No.L4940V5
£0.935
Each (In a Tube of 50)
Units
- 5 V Fixed TO-220 1.5A Through Hole - 17 V 3 1 Positive 5mA - -40 °C
RS Stock No. 298-8491
Mfr. Part No.L4940V5
£2.03
Each
Units
- 5 V Fixed TO-220 1.5A Through Hole - 17 V 3 1 Positive 5mA - -40 °C