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. 165-7780
Mfr. Part No.LD29300P2MTR
R 8.773
Each (On a Reel of 1000)
units
- - Adjustable P2PAK/A 3A Surface Mount 2.5 V 30 V 6 1 Positive 20mA ±1% -40 °C
RS stock no. 146-0191
Mfr. Part No.MCP1703A-3302E/DB
BrandMicrochip
R 9.027
Each (In a Tube of 78)
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. 889-5250
Mfr. Part No.MCP1703T-3302E/CB
BrandMicrochip
R 7.005
Each (On a Reel of 3000)
units
- 3.3 V Fixed SOT-23A 250mA Surface Mount 2.7 V 16 V 3 1 Positive 0.002mA ±2% -40 °C
RS stock no. 669-4907
Mfr. Part No.MCP1703T-3302E/CB
BrandMicrochip
R 9.265
Each (In a Pack of 10)
units
- 3.3 V Fixed SOT-23A 250mA Surface Mount 2.7 V 16 V 3 1 Positive 0.002mA ±2% -40 °C
RS stock no. 102-5695
Mfr. Part No.LM2937ES-5.0/NOPB
R 32.353
Each (In a Tube of 45)
units
- 5 V Fixed D2PAK (TO-263) 500mA Surface Mount - 26 V 3 1 Positive - ±5% -40 °C
RS stock no. 146-0950
Mfr. Part No.AZ1117H-3.3TRE1
R 1.71
Each (On a Reel of 4000)
units
- 3.3 V Fixed SOT-223 1A Surface Mount - 15 V 3+Tab 1 Positive 10mA 1% -40 °C
RS stock no. 121-9647
Mfr. Part No.AP2112K-3.3TRG1
R 1.652
Each (On a Reel of 3000)
units
- 3.3 V Fixed SOT-23 - Surface Mount 2.5 V 6 V 5 1 Positive 80µA ±1.5% -40 °C
RS stock no. 770-9486
Mfr. Part No.MCP1703A-3302E/DB
BrandMicrochip
R 10.748
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. 669-5083
Mfr. Part No.MCP1825S-3302E/AB
BrandMicrochip
R 14.222
Each (In a Pack of 5)
units
- 3.3 V Fixed TO-220 500mA Through Hole 2.1 V 6 V 3 1 Positive 0.12mA ±0.5% -40 °C
RS stock no. 686-9173
Mfr. Part No.LD29300P2MTR
R 18.86
Each (In a Pack of 5)
units
- - Adjustable P2PAK/A 3A Surface Mount 2.5 V 30 V 6 1 Positive 20mA ±1% -40 °C
RS stock no. 889-6042
Mfr. Part No.MCP1826S-3302E/DB
BrandMicrochip
R 9.853
Each (In a Tube of 78)
units
- 3.3 V Fixed SOT-223 1A Surface Mount 2.3 V 6 V 3+Tab 1 Positive 0.12mA ±2% -40 °C
RS stock no. 828-3509
Mfr. Part No.AP2112K-3.3TRG1
R 3.04
Each (In a Pack of 50)
units
- 3.3 V Fixed SOT-23 - Surface Mount 2.5 V 6 V 5 1 Positive 80µA ±1.5% -40 °C
RS stock no. 829-6934
Mfr. Part No.LDK220M50R
R 11.672
Each (In a Pack of 10)
units
- 5 V Fixed SOT-23 200mA Surface Mount 2.5 V 13.2 V 5 1 Positive 100µA ±3% -40 °C
RS stock no. 165-7492
Mfr. Part No.LF33CDT-TR
R 4.881
Each (On a Reel of 2500)
units
- 3.3 V Fixed DPAK 500mA Surface Mount - 16 V 3 1 Positive 0.5mA ±2% -40 °C
RS stock no. 806-2059
Mfr. Part No.MC33269ST-3.3T3G
R 12.576
Each (In a Pack of 20)
units
- 3.3 V Fixed SOT-223 800mA Surface Mount - 20 V 3+Tab 1 Positive 8mA ±1% -40 °C
RS stock no. 534-3021
Mfr. Part No.LM3940IT-3.3/NOPB
R 32.60
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. 121-9649
Mfr. Part No.AP2125K-3.3TRG1
R 1.327
Each (On a Reel of 3000)
units
- 3.3 V Fixed SOT-23 - Surface Mount - 6 V 5 1 Positive 90µA ±2% -40 °C
RS stock no. 864-7856
Mfr. Part No.NCP584HSN18T1G
R 3.449
Each (In a Pack of 25)
units
- 1.8 V Fixed SOT-23 250mA Surface Mount 1.4 V 6 V 5 1 Positive 70µA ±2% -40 °C
RS stock no. 144-5789
Mfr. Part No.MCP1802T-3002I/OT
BrandMicrochip
R 6.851
Each (On a Reel of 3000)
units
- 3 V Fixed SOT-23 300mA Surface Mount 2 V 10 V 5 1 Positive 0.025mA ±2% -40 °C
RS stock no. 669-4945
Mfr. Part No.MCP1802T-3002I/OT
BrandMicrochip
R 9.232
Each (In a Pack of 5)
units
- 3 V Fixed SOT-23 300mA Surface Mount 2 V 10 V 5 1 Positive 0.025mA ±2% -40 °C