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. 145-6199
Mfr. Part No.TPS78233DDCT
€0.411
Each (On a Reel of 250)
units
- 3.3 V Fixed SOT-23 150mA Surface Mount 2.2 V 5.5 V 5 1 Positive 0.0005mA ±2% -40 °C
RS Stock No. 802-4177
Mfr. Part No.NCP511SN33T1G
€0.371
Each (On a Tape of 25)
units
- 3.3 V Fixed TSOP - Surface Mount 0 V 6 V 5 1 Positive 100µA 2% -40 °C
RS Stock No. 162-9538
Mfr. Part No.NCP551SN50T1G
€0.114
Each (On a Reel of 3000)
units
- 5 V Fixed TSOP 150mA Surface Mount 0 V 12 V 5 1 Positive 8µA 2% -40 °C
RS Stock No. 178-4922
Mfr. Part No.TC1264-3.3VAB
BrandMicrochip
€0.695
Each (In a Tube of 50)
units
- 3.3 V Fixed TO-220 800mA Through Hole 2.7 V 6 V 3 1 Positive - ±0.5% -40 °C
RS Stock No. 145-7424
Mfr. Part No.ADP1755ACPZ-R7
€1.248
Each (On a Reel of 1500)
units
- 0.75 → 3.3 V Adjustable LFCSP 1.2A Surface Mount 1.6 V 3.6 V 16 5 Positive - 0.51V -40 °C
RS Stock No. 785-7276
Mfr. Part No.NCP551SN50T1G
€0.121
Each (In a Pack of 10)
units
- 5 V Fixed TSOP 150mA Surface Mount 0 V 12 V 5 1 Positive 8µA 2% -40 °C
RS Stock No. 709-8758
Mfr. Part No.TPS78233DDCT
€0.77
Each (In a Pack of 5)
units
- 3.3 V Fixed SOT-23 150mA Surface Mount 2.2 V 5.5 V 5 1 Positive 0.0005mA ±2% -40 °C
RS Stock No. 809-9900
Mfr. Part No.ADP1755ACPZ-R7
€2.39
Each (In a Pack of 5)
units
- 0.75 → 3.3 V Adjustable LFCSP 1.2A Surface Mount 1.6 V 3.6 V 16 5 Positive - 0.51V -40 °C
RS Stock No. 686-9697
Mfr. Part No.LD1085P
€1.252
Each (In a Pack of 5)
units
- 1.25 → 28 V Adjustable TO-220FP 3A Through Hole - 30 V 3 1 Positive 5mA ±1% -40 °C
RS Stock No. 533-5632
Mfr. Part No.LM2940T-5.0/NOPB
€1.89
Each
units
- 5 V Fixed TO-220 1A Through Hole 6.25 V 26 V 3 1 Positive - - -40 °C
RS Stock No. 921-6885
Mfr. Part No.LM2940IMP-5.0/NOPB
€0.831
Each (On a Reel of 1000)
units
- 5 V Fixed SOT-223 1A Surface Mount - 26 V 3+Tab 1 Positive 15mA - -40 °C
RS Stock No. 168-6583
Mfr. Part No.LD1085P
€1.066
Each (In a Tube of 50)
units
- 1.25 → 28 V Adjustable TO-220FP 3A Through Hole - 30 V 3 1 Positive 5mA ±1% -40 °C
RS Stock No. 100-3962
Mfr. Part No.LM2940T-5.0/NOPB
€1.144
Each (In a Tube of 45)
units
- 5 V Fixed TO-220 1A Through Hole 6.25 V 26 V 3 1 Positive - - -40 °C
RS Stock No. 162-9069
Mfr. Part No.NCP511SN33T1G
€0.148
Each (On a Reel of 3000)
units
- 3.3 V Fixed TSOP - Surface Mount 0 V 6 V 5 1 Positive 100µA 2% -40 °C
RS Stock No. 761-4609
Mfr. Part No.LM2940IMP-12/NOPB
€0.648
Each (In a Pack of 5)
units
- 12 V Fixed SOT-223 1A Surface Mount 13.6 V 26 V 3+Tab 1 Positive 20mA - -40 °C
RS Stock No. 145-9587
Mfr. Part No.LE33CZ-TR
€0.255
Each (On a Reel of 2000)
units
- 3.3 V Fixed TO-92 100mA Through Hole - 18 V 3 1 Positive 1.5mA ±2% -40 °C
RS Stock No. 821-3412
Mfr. Part No.NCV47701DAJR2G
€1.794
Each (In a Pack of 5)
units
- 5 → 20 V Adjustable SOIC 350mA Surface Mount 5.5 V 40 V 8 1 Positive 50mA ±3% -40 °C
RS Stock No. 823-4434
Mfr. Part No.TC2117-3.3VDBTR
BrandMicrochip
€0.617
Each (In a Pack of 10)
units
- 3.3 V Fixed SOT-223 800mA Surface Mount 2.7 V 6 V 3+Tab 1 Positive - ±0.5% -40 °C
RS Stock No. 661-4009
Mfr. Part No.TPS73218DBVR
€1.254
Each (In a Pack of 5)
units
- 1.8 V Fixed SOT-23 250mA Surface Mount 1.7 V 5.5 V 5 1 Positive - ±0.5% -40 °C
RS Stock No. 122-3379
Mfr. Part No.AZ1117CH-3.3TRG1
€0.062
Each (On a Reel of 4000)
units
- 3.3 V Fixed SOT-223 800mA Surface Mount - 15 V 3+Tab 1 Positive 6mA ±1% -20 °C
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