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. 165-7739
Mfr. Part No.LD1117AS12TR
HK$2.09
Each (On a Reel of 2500)
units
- 1.2 V Fixed SOT-223 1.2A Surface Mount - 10 V 3+Tab 1 Positive 5mA ±2% 0 °C
RS Stock No. 165-4613
Mfr. Part No.TC1014-2.5VCT713
BrandMicrochip
HK$2.24
Each (On a Reel of 3000)
units
- 2.5 V Fixed SOT-23 50mA Surface Mount 2.7 V 6 V 5 1 Positive <0.0005mA ±2.5% -40 °C
RS Stock No. 545-6408
Mfr. Part No.LT1584CT#PBF
HK$119.61
Each
units
- - Adjustable TO-220 7A Through Hole 2.5 V 7 V 3 1 Positive 8mA - 0 °C
RS Stock No. 145-1189
Mfr. Part No.LT1584CT#PBF
HK$79.422
Each (In a Tube of 50)
units
- - Adjustable TO-220 7A Through Hole 2.5 V 7 V 3 1 Positive 8mA - 0 °C
RS Stock No. 545-5736
Mfr. Part No.LT1085CT-12#PBF
HK$73.13
Each
units
- 12 V Fixed TO-220 3A Through Hole 4.3 V 25 V 3 1 Positive 5mA ±1% 0 °C
RS Stock No. 921-0701
Mfr. Part No.AZ1117H-3.3TRE1
HK$2.802
Each (In a Pack of 50)
units
- 3.3 V Fixed SOT-223 1A Surface Mount - 15 V 3+Tab 1 Positive 10mA 1% -40 °C
RS Stock No. 102-5639
Mfr. Part No.LP2985IM5-3.3/NOPB
HK$2.764
Each (On a Reel of 1000)
units
- 3.3 V Fixed SOT-23 150mA Surface Mount 2.5 V 16 V 5 1 Positive - ±3% -40 °C
RS Stock No. 100-5922
Mfr. Part No.LM1086IS-3.3/NOPB
HK$16.17
Each (In a Tube of 45)
units
- 3.3 V Fixed D2PAK (TO-263) 1.5A Surface Mount 2.6 V 30 V 3 1 Positive - - -40 °C
RS Stock No. 821-3320
Mfr. Part No.NCP692MN33T2G
HK$6.911
Each (In a Pack of 10)
units
- 3.3 V Fixed DFN 1A Surface Mount 1.5 V 6 V 6 1 Positive - ±2% -40 °C
RS Stock No. 145-6357
Mfr. Part No.LT1085CT-12#PBF
HK$48.575
Each (In a Tube of 50)
units
- 12 V Fixed TO-220 3A Through Hole 4.3 V 25 V 3 1 Positive 5mA ±1% 0 °C
RS Stock No. 100-5911
Mfr. Part No.LM1084IT-3.3/NOPB
HK$18.83
Each (In a Tube of 45)
units
- 3.3 V Fixed TO-220 5A Through Hole 2.6 V 27 V 3 1 Positive - - -40 °C
RS Stock No. 651-9960
Mfr. Part No.LP2985IM5-3.3/NOPB
HK$6.90
Each
units
- 3.3 V Fixed SOT-23 150mA Surface Mount 2.5 V 16 V 5 1 Positive - ±3% -40 °C
RS Stock No. 536-1546
Mfr. Part No.LM3940IMP-3.3/NOPB
HK$14.02
Each
units
- 3.3 V Fixed SOT-223 1A Surface Mount 4.5 V 7.5 V 3+Tab 1 Positive - - -40 °C
RS Stock No. 145-1188
Mfr. Part No.LT1085CT-5#PBF
HK$48.575
Each (In a Tube of 50)
units
- 5 V Fixed TO-220 3A Through Hole 4.3 V 25 V 3 1 Positive 5mA ±1% 0 °C
RS Stock No. 121-8914
Mfr. Part No.LM3940IMP-3.3/NOPB
HK$5.879
Each (On a Reel of 1000)
units
- 3.3 V Fixed SOT-223 1A Surface Mount 4.5 V 7.5 V 3+Tab 1 Positive - - -40 °C
RS Stock No. 313-8316
Mfr. Part No.NJM2370U1-33
HK$4.804
Each (In a Pack of 5)
units
- 3.3 V Fixed SOT-89 180mA Surface Mount - 20 V 6 1 Positive 0.18mA 3% -40 °C
RS Stock No. 121-7934
Mfr. Part No.NCP692MN33T2G
HK$3.275
Each (On a Reel of 3000)
units
- 3.3 V Fixed DFN 1A Surface Mount 1.5 V 6 V 6 1 Positive - ±2% -40 °C
RS Stock No. 533-9331
Mfr. Part No.LM1084IT-5.0/NOPB
HK$22.82
Each
units
- 5 V Fixed TO-220 5A Through Hole 2.6 V 25 V 3 1 Positive - - -40 °C
RS Stock No. 506-3804
Mfr. Part No.LT1764EQ#PBF
HK$68.19
Each
units
- 1.21 → 20 V Adjustable D2PAK 3A Surface Mount 2.7 V 20 V 6 1 Positive 1mA - -40 °C
RS Stock No. 535-8685
Mfr. Part No.LM1117MP-2.5/NOPB
HK$9.692
Each (In a Pack of 5)
units
- 2.5 V Fixed SOT-223 800mA Surface Mount - 15 V 3+Tab 1 Positive - ±1% 0 °C
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