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. 769-5504
Mfr. Part No.SPX29302T5-L
BrandMaxLinear
$4.354
Each (In a Pack of 5)
units
- 1.25 → 16 V Adjustable D2PAK (TO-263) 3A Surface Mount 2.8 V 16 V 5 1 Positive 60mA 1% -40 °C
RS Stock No. 686-5878
Mfr. Part No.SPX5205M5-L-3-3/TR
BrandMaxLinear
$0.64
Each (In a Pack of 10)
units
- 3.3 V Fixed SOT-23 150mA Surface Mount 2.5 V 16 V 5 1 Positive 0.07mA ±1% -40 °C
RS Stock No. 769-5532
Mfr. Part No.SPX3819S-L-5-0
BrandMaxLinear
$0.66
Each (In a Pack of 10)
units
- 5 V Fixed SOIC 500mA Surface Mount 2.5 V 16 V 8 1 Positive 8µA ±2% -40 °C
RS Stock No. 769-5539
Mfr. Part No.SPX3940T-L-3-3
BrandMaxLinear
$1.454
Each (In a Pack of 5)
units
- 3.3 V Fixed D2PAK (TO-263) 1A Surface Mount 3.1 V 16 V 3 1 Positive 25mA 1% -40 °C
RS Stock No. 778-0706
Mfr. Part No.LP2951CS-L-5-0
BrandMaxLinear
$0.684
Each (In a Pack of 7)
units
- 5 V, 1.25 → 29 V Adjustable, Fixed SOIC 100mA Surface Mount 2.4 V 30 V 8 1 Positive 150µA ±1% -40 °C
RS Stock No. 913-4219
Mfr. Part No.SPX29302T5-L/TR
BrandMaxLinear
$1.815
Each (On a Reel of 500)
units
- 1.25 → 16 V Adjustable D2PAK (TO-263) 3A Surface Mount - 16 V 5 1 Positive 40mA ±1% -40 °C
RS Stock No. 913-4193
Mfr. Part No.SP6205EM5-L-3-3/TR
BrandMaxLinear
$0.527
Each (On a Reel of 2500)
units
- 3.3 V Fixed SOT-23 500mA Surface Mount 2.7 V 5.5 V 5 1 Positive 0.045mA ±2% -40 °C
RS Stock No. 769-5523
Mfr. Part No.SPX3819S-L
BrandMaxLinear
$1.399
Each (In a Pack of 7)
units
- 1.23 → 15 V Adjustable SOIC 500mA Surface Mount 2.5 V 16 V 8 1 Positive 8µA ±2% -40 °C
RS Stock No. 686-5869
Mfr. Part No.SPX29302T5-L/TR
BrandMaxLinear
$3.37
Each (In a Pack of 2)
units
- 1.25 → 16 V Adjustable D2PAK (TO-263) 3A Surface Mount - 16 V 5 1 Positive 40mA ±1% -40 °C
RS Stock No. 913-4200
Mfr. Part No.SPX1117M3-L-3-3/TR
BrandMaxLinear
$0.177
Each (On a Reel of 2500)
units
- 3.3 V Fixed SOT-223 800mA Surface Mount 2.6 V 15 V 3+Tab 1 Positive 5mA ±1% -40 °C