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. 802-2137
Mfr. Part No.NCP1117LPST33T3G
R 5.385
Each (In a Pack of 25)
units
- 3.3 V Fixed SOT-223 1.1A Surface Mount -0.3 V 18 V 3+Tab 1 Positive 700µA - 0 °C
RS stock no. 168-6597
Mfr. Part No.LD1117V33C
R 6.466
Each (In a Tube of 50)
units
- 3.3 V Fixed TO-220 1.3A Through Hole - 15 V 3 1 Positive 5mA ±1% -40 °C
RS stock no. 686-9767
Mfr. Part No.LD1117V33C
R 11.077
Each (In a Pack of 10)
units
- 3.3 V Fixed TO-220 1.3A Through Hole - 15 V 3 1 Positive 5mA ±1% -40 °C
RS stock no. 165-4039
Mfr. Part No.MIC5219-3.3YM5-TR
BrandMicrochip
R 11.276
Each (On a Reel of 3000)
units
- 3.3 V Fixed SOT-23 500mA Surface Mount 2.5 V 12 V 5 1 Positive 8µA ±2% -40 °C
RS stock no. 910-1685
Mfr. Part No.MIC5219-3.3YM5-TR
BrandMicrochip
R 31.666
Each (In a Pack of 5)
units
- 3.3 V Fixed SOT-23 500mA Surface Mount 2.5 V 12 V 5 1 Positive 8µA ±2% -40 °C
RS stock no. 533-9583
Mfr. Part No.LM1117MP-5.0/NOPB
R 19.75
Each
units
- 5 V Fixed SOT-223 800mA Surface Mount - 15 V 3+Tab 1 Positive - ±1% 0 °C
RS stock no. 100-5931
Mfr. Part No.LM1117MP-5.0/NOPB
R 8.788
Each (On a Reel of 1000)
units
- 5 V Fixed SOT-223 800mA Surface Mount - 15 V 3+Tab 1 Positive - ±1% 0 °C
RS stock no. 887-7429
Mfr. Part No.MCP1700T-3302E/TT
BrandMicrochip
R 4.686
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. 170-9148
Mfr. Part No.HT7533-1-SOT89
BrandHoltek
R 7.403
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
R 8.025
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. 698-9044
Mfr. Part No.MCP1700T-3302E/TT
BrandMicrochip
R 12.75
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. 770-9524
Mfr. Part No.MCP1703T-3302E/MB
BrandMicrochip
R 12.423
Each (In a Pack of 10)
units
- 3.3 V Fixed SOT-89 250mA Surface Mount 2.7 V 16 V 3 1 Positive 5µA 2% -40 °C
RS stock no. 912-2916
Mfr. Part No.MCP1703T-3302E/MB
BrandMicrochip
R 6.985
Each (On a Reel of 1000)
units
- 3.3 V Fixed SOT-89 250mA Surface Mount 2.7 V 16 V 3 1 Positive 5µA 2% -40 °C
RS stock no. 165-7750
Mfr. Part No.LD1117S33CTR
R 2.212
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% -40 °C
RS stock no. 686-9388
Mfr. Part No.LD1117S33CTR
R 5.643
Each (In a Pack of 25)
units
- 3.3 V Fixed SOT-223 1.3A Surface Mount - 15 V 3+Tab 1 Positive 5mA ±1% -40 °C
RS stock no. 100-5910
Mfr. Part No.LM1084IS-ADJ/NOPB
R 39.272
Each (In a Tube of 45)
units
- - Adjustable D2PAK (TO-263) 5A Surface Mount 2.6 V 29 V 3 1 Positive - - -40 °C
RS stock no. 163-0718
Mfr. Part No.NCP5501DT33RKG
R 3.997
Each (On a Reel of 2500)
units
- 3.462 V Fixed DPAK 500mA Surface Mount 2.5 V 16 V 3 1 Positive - ±2.9% -40 °C
RS stock no. 806-0895
Mfr. Part No.NCP5501DT33RKG
R 7.594
Each (On a Tape of 25)
units
- 3.462 V Fixed DPAK 500mA Surface Mount 2.5 V 16 V 3 1 Positive - ±2.9% -40 °C
RS stock no. 533-9296
Mfr. Part No.LM1084IS-ADJ/NOPB
R 47.35
Each
units
- - Adjustable D2PAK (TO-263) 5A Surface Mount 2.6 V 29 V 3 1 Positive - - -40 °C
RS stock no. 165-5515
Mfr. Part No.LDS3985M33R
R 4.703
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