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. 165-5515
Mfr. Part No.LDS3985M33R
TWD9.40
Each (On a Reel of 3000)
units
- 3.3 V Fixed SOT-23 300mA Surface Mount 2.5 V 6 V 5 1 Positive 1.5 (OFF Mode) μA, 300 (ON Mode) μA - -40 °C
RS Stock No. 880-5323
Mfr. Part No.LDS3985M33R
TWD15.90
Each (In a Pack of 25)
units
- 3.3 V Fixed SOT-23 300mA Surface Mount 2.5 V 6 V 5 1 Positive 1.5 (OFF Mode) μA, 300 (ON Mode) μA - -40 °C
RS Stock No. 168-6804
Mfr. Part No.LD1117S33TR
TWD4.30
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
TWD10.50
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. 829-4373
Mfr. Part No.LD1117DT12CTR
TWD8.80
Each (In a Pack of 10)
units
- 1.2 V Fixed DPAK 800mA Surface Mount - 15 V 3 1 Positive - - -40 °C
RS Stock No. 165-7427
Mfr. Part No.LD1117DT50TR
TWD5.40
Each (On a Reel of 2500)
units
- 5 V Fixed DPAK 1.3A Surface Mount - 15 V 3 1 Positive 5mA ±1% 0 °C
RS Stock No. 829-4626
Mfr. Part No.LDK130PU30R
TWD10.00
Each (In a Pack of 10)
units
- 3 V Fixed DFN 300mA Surface Mount 1.9 V 5.5 V 6 1 Positive 120µA ±3% -40 °C
RS Stock No. 168-8614
Mfr. Part No.LD1117DT12CTR
TWD6.40
Each (On a Reel of 2500)
units
- 1.2 V Fixed DPAK 800mA Surface Mount - 15 V 3 1 Positive - - -40 °C
RS Stock No. 438-4885
Mfr. Part No.LD1117V33
TWD12.20
Each (In a Tube of 50)
units
- 3.3 V Fixed TO-220 1.3A Through Hole - 15 V 3 1 Positive 5mA ±1% 0 °C
RS Stock No. 686-9259
Mfr. Part No.LD1117DT50TR
TWD9.70
Each (In a Pack of 25)
units
- 5 V Fixed DPAK 1.3A Surface Mount - 15 V 3 1 Positive 5mA ±1% 0 °C
RS Stock No. 168-8674
Mfr. Part No.LDK130PU30R
TWD8.30
Each (On a Reel of 3000)
units
- 3 V Fixed DFN 300mA Surface Mount 1.9 V 5.5 V 6 1 Positive 120µA ±3% -40 °C
RS Stock No. 298-8491
Mfr. Part No.L4940V5
TWD51.00
Each
units
- 5 V Fixed TO-220 1.5A Through Hole - 17 V 3 1 Positive 5mA - -40 °C
RS Stock No. 168-6058
Mfr. Part No.L4940V5
TWD28.20
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. 686-8849
Mfr. Part No.LD2981CU50TR
TWD18.80
Each (In a Pack of 5)
units
- 5 V Fixed SOT-89 100mA Surface Mount 2.5 V 16 V 3 1 Positive 0.08mA - -40 °C
RS Stock No. 686-9372
Mfr. Part No.LD1117SC-R
TWD10.00
Each (In a Pack of 25)
units
- 1.25 → 15 V Adjustable SOT-223 1.3A Surface Mount - 15 V 3+Tab 1 Positive - ±1% -40 °C
RS Stock No. 165-7456
Mfr. Part No.LD1085D2T33R
TWD21.00
Each (On a Reel of 1000)
units
- 3.3 V Fixed D2PAK 3A Surface Mount - 30 V 3 1 Positive 5mA ±1% -40 °C
RS Stock No. 829-6903
Mfr. Part No.LDF33PT-TR
TWD21.80
Each (In a Pack of 5)
units
- 3.3 V Fixed PPAK 1A Surface Mount 2.6 V 16 V 5 1 Positive 800µA ±1.5% -40 °C
RS Stock No. 686-9782
Mfr. Part No.LD1117AV33
TWD10.90
Each (In a Pack of 10)
units
- 3.3 V Fixed TO-220 1.2A Through Hole - 10 V 3 1 Positive 5mA ±2% 0 °C
RS Stock No. 686-8802
Mfr. Part No.LD3985M33R
TWD23.00
Each (In a Pack of 5)
units
- 3.3 V Fixed SOT-23 550mA Surface Mount 2.5 V 6 V 5 1 Positive 0.17mA ±2% -40 °C
RS Stock No. 165-7748
Mfr. Part No.LD1117S50TR
TWD4.00
Each (On a Reel of 2500)
units
- 5 V Fixed SOT-223 1.3A Surface Mount - 15 V 3+Tab 1 Positive 5mA ±1% 0 °C