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. 122-3379
Mfr. Part No.AZ1117CH-3.3TRG1
SGD0.128
Each (On a Reel of 4000)
units
- 3.3 V Fixed SOT-223 800mA Surface Mount - 15 V 3+Tab 1 Positive 6mA ±1% -20 °C
RS Stock No. 828-7609
Mfr. Part No.AZ1117CH-3.3TRG1
SGD0.185
Each (In a Pack of 50)
units
- 3.3 V Fixed SOT-223 800mA Surface Mount - 15 V 3+Tab 1 Positive 6mA ±1% -20 °C
RS Stock No. 533-9280
Mfr. Part No.LM1084IS-3.3/NOPB
SGD4.39
Each
units
- 3.3 V Fixed D2PAK (TO-263) 5A Surface Mount 2.6 V 27 V 3 1 Positive - - -40 °C
RS Stock No. 155-9377
Mfr. Part No.LT1084CT-5#PBF
SGD9.602
Each (In a Tube of 50)
units
- 4.9 → 5.1 V Fixed TO-220 5A Through Hole - 20 V 3 1 Positive 10mA - 0 °C
RS Stock No. 121-8740
Mfr. Part No.LM1084IS-3.3/NOPB
SGD3.51
Each (In a Tube of 45)
units
- 3.3 V Fixed D2PAK (TO-263) 5A Surface Mount 2.6 V 27 V 3 1 Positive - - -40 °C
RS Stock No. 858-0832
Mfr. Part No.LT1084CT-5#PBF
SGD13.04
Each
units
- 4.9 → 5.1 V Fixed TO-220 5A Through Hole - 20 V 3 1 Positive 10mA - 0 °C
RS Stock No. 917-3447
Mfr. Part No.LT1965EMS8E#PBF
SGD4.262
Each (In a Tube of 50)
units
- 1.2 → 19.5 V Adjustable MSOP 1.1A Surface Mount 1.8 V 20 V 8 1 Positive 0.5mA - -40 °C
RS Stock No. 535-8641
Mfr. Part No.LM1117IMP-5.0/NOPB
SGD1.686
Each (In a Pack of 5)
units
- 5 V Fixed SOT-223 800mA Surface Mount - 15 V 3+Tab 1 Positive - ±1% -40 °C
RS Stock No. 165-7426
Mfr. Part No.LD1117DT33TR
SGD0.219
Each (On a Reel of 2500)
units
- 3.3 V Fixed DPAK 1.3A Surface Mount - 15 V 3 1 Positive 5mA ±1% 0 °C
RS Stock No. 857-8826
Mfr. Part No.TLE42702AKSA1
BrandInfineon
SGD2.039
Each (In a Tube of 500)
units
- 4.9 → 5.1 V Fixed TO-220 850mA Surface Mount 6 V 42 V 5 1 Positive 550mA ±2% -40 °C
RS Stock No. 102-5681
Mfr. Part No.LM1117IMP-5.0/NOPB
SGD0.768
Each (On a Reel of 1000)
units
- 5 V Fixed SOT-223 800mA Surface Mount - 15 V 3+Tab 1 Positive - ±1% -40 °C
RS Stock No. 819-5550
Mfr. Part No.MCP1825T-ADJE/DC
BrandMicrochip
SGD0.559
Each (On a Reel of 4000)
units
- 0.8 → 5 V Adjustable SOT-223 500mA Surface Mount 2.1 V 6 V 5+Tab 1 Positive 220µA - -40 °C
RS Stock No. 686-9252
Mfr. Part No.LD1117DT33TR
SGD0.606
Each (In a Pack of 25)
units
- 3.3 V Fixed DPAK 1.3A Surface Mount - 15 V 3 1 Positive 5mA ±1% 0 °C
RS Stock No. 423-494
Mfr. Part No.LT1965EMS8E#PBF
SGD6.53
Each
units
- 1.2 → 19.5 V Adjustable MSOP 1.1A Surface Mount 1.8 V 20 V 8 1 Positive 0.5mA - -40 °C
RS Stock No. 534-3021
Mfr. Part No.LM3940IT-3.3/NOPB
SGD2.40
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. 153-3423
Mfr. Part No.LT1086CT-12#PBF
SGD4.755
Each (In a Tube of 50)
units
- 12 V Fixed TO-220 1.5A Through Hole - 25 V 3 1 Positive 5mA - 0 °C
RS Stock No. 100-5939
Mfr. Part No.LM3940IT-3.3/NOPB
SGD1.587
Each (In a Tube of 45)
units
- 3.3 V Fixed TO-220 1A Through Hole 4.5 V 7.5 V 3 1 Positive - - -40 °C
RS Stock No. 901-3254
Mfr. Part No.LT1086CT-3.3#PBF
SGD5.36
Each (In a Pack of 2)
units
- 3.3 V Fixed TO-220 1.5A Through Hole - 20 V 3 1 Positive 5mA - 0 °C
RS Stock No. 102-5680
Mfr. Part No.LM1117IMP-3.3/NOPB
SGD0.743
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. 647-4996
Mfr. Part No.LP2985IM5-5.0/NOPB
SGD0.94
Each
units
- 5 V Fixed SOT-23 150mA Surface Mount 2.5 V 16 V 5 1 Positive - ±3% -40 °C
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