Linear Voltage Regulators

A Linear Voltage Regulator ensures the output voltage from the circuit is maintained at a specific voltage.

The device acts as a variable resistor, continuously adjusting to maintain a constant output voltage. The regulated voltage must be lower than the input voltage. Simple voltage regulator contains a Zener Diode and a resistor but more complicated versions include elements like a voltage reference and error amplifiers.

A more specific type of regulator are Low Dropout Voltage Regulators (LDO) which can regulate voltage even when the power supply voltage is very close to the supply voltage.


How to choose linear voltage regulator ICs?


The primary feature in choosing a regulator is usually the Output voltage as the main purpose of one is to regulate the voltage to a specific value such as 3.3V. Its accuracy to this voltage across temperature and load current is another consideration as is its maximum load. The dropout voltage value will be particularly important with battery applications.


How to test a linear voltage regulator?


  1. Set your multimeter to the voltage setting
  2. Check the datasheet to determine which pins are the ground, input and output.
  3. Attach the red wire to the input and the black wire to the ground, the multimeter should give a reading higher than the regulators' output value. If not then there is a power supply issue.
  4. Attach the red to the ground and the black wire the output, the multimeter should then give the regulators' output value (plus minus its accuracy). If not then the regulator is likely to be faulty.

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Part Details Brand Output Voltage Maximum Output Current Package Type Output Type Mounting Type Minimum Input Voltage Maximum Input Voltage Pin Count Power Rating Minimum Operating Temperature Maximum Operating Temperature Number of Outputs Polarity Series Dimensions Typical Dropout Voltage @ Current Height Load Regulation Line Regulation Width Quiescent Current Length Reference Voltage Dropout Voltage Measurement Current Accuracy
Analog Devices, 3.3 V Linear Voltage Regulator, 200mA, 1-Channel, ±2% 4-Pin, WLCSP ADP151ACBZ-3.3-R7 Analog Devices 3.3 V 200mA WLCSP Fixed Surface Mount 2.2 V 5.5 V 4 - -40 °C +125 °C 1 - - 0.8 x 0.8 x 0.66mm 135 mV @ 200 mA 0.66mm 0.009 %/mA ±0.5 %/V 0.8mm 256µA 0.8mm - 200 mA ±2%
Analog Devices, 1.2 V Linear Voltage Regulator, 500mA, 1-Channel, ±3% 8-Pin, MSOP ADP1715ARMZ-1.2-R7 Analog Devices 1.2 V 500mA MSOP Fixed Surface Mount 2.5 V 5.5 V 8 - -40 °C +125 °C 1 - - 3.2 x 3.2 x 0.95mm 320 mV @ 500 mA 0.95mm 0.004 %/mA ±0.15 %/V 3.2mm - 3.2mm - 500 mA ±3%
Analog Devices, 5.2 V Linear Voltage Regulator, 500mA, Quad-Channel, Adjustable 16-Pin, SMT HMC1060LP3ETR Analog Devices 5.2 V 500mA SMT Adjustable Surface Mount 3.35 V 5.6 V 16 - -40 °C +85 °C 4 - - 3.1 x 3.1 x 0.95mm - 0.95mm 0.007 %/mA - 3.1mm - 3.1mm - - -
ON Semiconductor, 1.27 → 15 V Linear Voltage Regulator, 10mA, 1-Channel, Adjustable, ±5% 6-Pin, DFN ON Semiconductor 1.27 → 15 V 10mA DFN Adjustable Surface Mount 55 V 450 V 6 - - +85 °C 1 - NCP786A 6.1 x 5.1 x 0.95mm - 0.95mm ±1 % ±0.5 % 5.1mm 15µA 6.1mm 1.27V 100 μA ±5%
Analog Devices, 1.2 V Linear Voltage Regulator, 500mA, 1-Channel, ±3% 8-Pin, MSOP ADP1715ARMZ-1.2-R7 Analog Devices 1.2 V 500mA MSOP Fixed Surface Mount 2.5 V 5.5 V 8 - -40 °C +125 °C 1 - - 3.2 x 3.2 x 0.95mm 320 mV @ 500 mA 0.95mm 0.004 %/mA ±0.15 %/V 3.2mm - 3.2mm - 500 mA ±3%
Analog Devices, 3.3 V Linear Voltage Regulator, 200mA, 1-Channel, ±2% 4-Pin, WLCSP ADP151ACBZ-3.3-R7 Analog Devices 3.3 V 200mA WLCSP Fixed Surface Mount 2.2 V 5.5 V 4 - -40 °C +125 °C 1 - - 0.8 x 0.8 x 0.66mm 135 mV @ 200 mA 0.66mm 0.009 %/mA ±0.5 %/V 0.8mm 256µA 0.8mm - 200 mA ±2%
Analog Devices, 5.2 V Linear Voltage Regulator, 500mA, Quad-Channel, Adjustable 16-Pin, SMT HMC1060LP3ETR Analog Devices 5.2 V 500mA SMT Adjustable Surface Mount 3.35 V 5.6 V 16 - -40 °C +85 °C 4 - - 3.1 x 3.1 x 0.95mm - 0.95mm 0.007 %/mA - 3.1mm - 3.1mm - - -
ON Semiconductor, 1.27 → 15 V Linear Voltage Regulator, 10mA, 1-Channel, Adjustable, ±5% 6-Pin, DFN ON Semiconductor 1.27 → 15 V 10mA DFN Adjustable Surface Mount 55 V 450 V 6 - - +85 °C 1 - NCP786A 6.1 x 5.1 x 0.95mm - 0.95mm ±1 % ±0.5 % 5.1mm 15µA 6.1mm 1.27V 100 μA ±5%
Microchip Technology, 1.8 V, 3.3 V LDO Regulator, 500mA 2-Channel, ±3% 8-Pin, MSOP MIC5355-SGYMME Microchip Technology 1.8 V, 3.3 V 500mA MSOP Fixed Surface Mount 2.5 V 5.5 V 8 - -40 °C +125 °C 2 Positive MIC5355 3 x 3 x 0.86mm 800 V @ 500 mA 0.86mm 1 % ±0.3 %/V 3mm 38µA 3mm - 500 mA ±3%
Microchip Technology, 3 V Voltage Regulator, 200mA, 1-Channel, ±3% 4-Pin, DFN MIC94310-PYMT-T5 Microchip Technology 3 V 200mA DFN Fixed Surface Mount 1.8 V 3.6 V 4 - -40 °C +125 °C 1 - MIC94310 1.2 x 1.6 x 0.5mm 40mV 0.5mm 4 mV 0.5 % 1.6mm - 1.2mm - 200 mA ±3%
Renesas Electronics, 0.6 → 5 V Linear Voltage Regulator, 25A, 1-Channel, ±1.2% 58-Pin, HDA RAA2109252GLG#AG0
  • £ 47.45
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Renesas Electronics 0.6 → 5 V 25A HDA Fixed Surface Mount 4.5 V 14 V 58 - -40 °C +85 °C 1 - RAA2109252 18 x 23 x 7.47mm - 7.47mm - - 23mm - 18mm 5.5 → 6.6V - ±1.2%
Renesas Electronics, 0.6 → 5 V Linear Voltage Regulator, 25A, 1-Channel, ±1.2% 41-Pin, HDA RAA2108252GLG#AG0
  • £ 29.82
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Renesas Electronics 0.6 → 5 V 25A HDA Fixed Surface Mount 4.5 V 14 V 41 - -40 °C +85 °C 1 - RAA2108252 17 x 19 x 3.57mm - 3.57mm - - 19mm - 17mm 5.5 → 6.6V - ±1.2%
Renesas Electronics, 0.6 → 5 V Linear Voltage Regulator, 33A, 1-Channel, ±1.2% 41-Pin, HDA RAA2108332GLG#AG0
  • £ 35.28
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Renesas Electronics 0.6 → 5 V 33A HDA Fixed Surface Mount 4.5 V 14 V 41 - -40 °C +85 °C 1 - RAA2108332 17 x 19 x 3.57mm - 3.57mm - - 19mm - 17mm 5.5 → 6.6V - ±1.2%
Renesas Electronics, 0.6 → 5 V Linear Voltage Regulator, 50A, 1-Channel, ±1.2% 58-Pin, HDA RAA2108502GLG#AG0
  • £ 54.76
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Renesas Electronics 0.6 → 5 V 50A HDA Fixed Surface Mount 4.5 V 14 V 58 - -40 °C +85 °C 1 - RAA2108502 18 x 23 x 7.47mm - 7.47mm - - 23mm - 18mm 5.5 → 6.6V - ±1.2%
Renesas Electronics, 0.6 → 5 V Linear Voltage Regulator, 70A, 1-Channel, ±1.2% 58-Pin, HDA RAA2108702GLG#AG0
  • £ 83.94
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Renesas Electronics 0.6 → 5 V 70A HDA Fixed Surface Mount 4.5 V 14 V 58 - -40 °C +85 °C 1 - RAA2108702 18 x 23 x 7.47mm - 7.47mm - - 23mm - 18mm 5.5 → 6.6V - ±1.2%
Renesas Electronics Linear Voltage Regulator RTKA2108252H00000BU Renesas Electronics - - - - - - - - - - - - - RTKA2108252 - - - - - - - - - - -
Renesas Electronics Linear Voltage Regulator RTKA2108332H00000BU Renesas Electronics - - - - - - - - - - - - - RTKA2108332 - - - - - - - - - - -
Renesas Electronics Linear Voltage Regulator RTKA2108502H00000BU Renesas Electronics - - - - - - - - - - - - - RTKA2108502 - - - - - - - - - - -
Renesas Electronics Linear Voltage Regulator RTKA2109252H00000BU Renesas Electronics - - - - - - - - - - - - - RTKA2109252 - - - - - - - - - - -
Renesas Electronics Linear Voltage Regulator RTKA2108702H00000BU Renesas Electronics - - - - - - - - - - - - - RTKA2108702 - - - - - - - - - - -
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