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. 921-5147
Mfr. Part No.TPS7A4501KTTR
HK$17.152
Each (On a Reel of 500)
units
- 1.21 → 20 V Adjustable D2PAK (TO-263) 1.5A Surface Mount 1.9 V 20 V 5 1 Positive 1mA ±1% -40 °C
RS Stock No. 714-7799
Mfr. Part No.LD1086D2T33TR
HK$7.53
Each (In a Pack of 5)
units
- 3.3 V Fixed D2PAK 1.5A Surface Mount - 30 V 3 1 Positive 5mA ±1% -40 °C
RS Stock No. 533-9347
Mfr. Part No.LM1084IT-ADJ/NOPB
HK$8.81
Each
units
- 1.2 → 15 V Adjustable TO-220 5A Through Hole 2.6 V 29 V 3 1 Positive - - -40 °C
RS Stock No. 802-2137
Mfr. Part No.NCP1117LPST33T3G
HK$2.698
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. 535-8635
Mfr. Part No.LM1117IMP-3.3/NOPB
HK$8.852
Each (In a Pack of 5)
units
- 3.3 V Fixed SOT-223 800mA Surface Mount - 15 V 3+Tab 1 Positive - ±1% -40 °C
RS Stock No. 785-2568
Mfr. Part No.NCP630AD2TR4G
HK$10.406
Each (In a Pack of 5)
units
- 1.2 → 10.5 V Adjustable D2PAK 3A Surface Mount - 12 V 5 1 Positive - ±1.5% -40 °C
RS Stock No. 851-4601
Mfr. Part No.LT3015IQ#PBF
HK$59.99
Each (In a Pack of 2)
units
- -29.3 → -1.2 V Adjustable D2PAK 1.5A Surface Mount -1.8 V 30 V 5 1 Negative 1.1mA - -40 °C
RS Stock No. 162-6011
Mfr. Part No.TPS79330DBVR
HK$2.128
Each (On a Reel of 3000)
units
- 3 V Fixed SOT-23 200mA Surface Mount 2.7 V 5.5 V 5 1 Positive 0.17mA ±2% -40 °C
RS Stock No. 825-8250
Mfr. Part No.LP2985IM5-2.7/NOPB
HK$4.636
Each (In a Pack of 10)
units
- 2.7 V Fixed SOT-23 350mA Surface Mount 2.2 V 16 V 5 1 Positive <1µA 1% -40 °C
RS Stock No. 100-5920
Mfr. Part No.LM1086CT-3.3/NOPB
HK$11.014
Each (In a Tube of 45)
units
- 3.3 V Fixed TO-220 1.5A Through Hole 2.6 V 30 V 3 1 Positive - - 0 °C
RS Stock No. 884-2556
Mfr. Part No.LT1963AET#PBF
HK$47.25
Each (In a Pack of 2)
units
- 1.21 → 20 V Adjustable TO-220 1.5A Through Hole 2.5 V 20 V 5 1 Positive 1µA - -40 °C
RS Stock No. 536-0470
Mfr. Part No.LP2950ACZ-3.0/NOPB
HK$7.374
Each (In a Pack of 5)
units
- 3 V Fixed TO-92 100mA Through Hole - 30 V 3 1 Positive - ±0.5% -40 °C
RS Stock No. 822-8874
Mfr. Part No.AP7331-33WG-7
HK$1.551
Each (In a Pack of 50)
units
- 3.3 V Fixed SOT-25 300mA Surface Mount 2 V 6 V 5 1 Positive 85µA ±2% -40 °C
RS Stock No. 145-0635
Mfr. Part No.LT1086CT#PBF
HK$26.33
Each (In a Tube of 50)
units
- - Adjustable TO-220 1.5A Through Hole - 25 V 3 1 Positive 5mA - 0 °C
RS Stock No. 535-8679
Mfr. Part No.LM1117MP-1.8/NOPB
HK$9.41
Each (In a Pack of 5)
units
- 1.8 V Fixed SOT-223 800mA Surface Mount - 15 V 3+Tab 1 Positive - ±1% 0 °C
RS Stock No. 168-6051
Mfr. Part No.L4941BV
HK$6.03
Each (In a Tube of 50)
units
- 5 V Fixed TO-220 1A Through Hole - 16 V 3 1 Positive 4mA ±4% -40 °C
RS Stock No. 545-6420
Mfr. Part No.LT1587CT-3.3#PBF
HK$51.04
Each
units
- 3.3 V Fixed TO-220 3A Through Hole 2.7 V 7 V 3 1 Positive 8mA - 0 °C
RS Stock No. 189-1374
Mfr. Part No.L4941BV
HK$9.12
Each
units
- 5 V Fixed TO-220 1A Through Hole - 16 V 3 1 Positive 4mA ±4% -40 °C
RS Stock No. 155-9300
Mfr. Part No.LT3015IQ#PBF
HK$47.338
Each (In a Tube of 50)
units
- -29.3 → -1.2 V Adjustable D2PAK 1.5A Surface Mount -1.8 V 30 V 5 1 Negative 1.1mA - -40 °C
RS Stock No. 660-8010
Mfr. Part No.TPS75801KC
HK$42.69
Each
units
- 1.225 → 5 V Adjustable TO-220 3A Through Hole 2.8 V 5.5 V 5 1 Positive 0.125mA ±3% -40 °C
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