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LM317 Calculator
Constant Resistors | Adjustable R 1 | Adjustable R 2 | Data Sheets
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Constant Resistors
What shall be calculated?
Calculate resistance R 1
Calculate resistance R 2
Calculate output voltage U Out
Resistors
Output voltage
Device-dependent parameters
Adjustable R 1
In case of a loose connection in potentiometer R 12 , the output voltage drops to U Out, Min during disconnections between the slider and the resistor track.
What shall be calculated?
Calculate resistances R 12, Max and R2
Calculate output voltage range U Out, Min … U Out, Max
Resistors
Output voltage range
Device-dependent parameters
Adjustable R 2
In case of a loose connection in potentiometer R 22 , the output voltage rises to U Out, Max during disconnections between the slider and the resistor track.
What shall be calculated?
Calculate resistances R 21 and R 22, Max
Calculate output voltage range U Out, Min … U Out, Max
Resistors
Output voltage range
Device-dependent parameters
Data sheets
LM317 (1,5 A): Texas Instruments , ON Semiconductor , STMicroelectronics , Linear Technology
LM350 (3 A): Texas Instruments , STMicroelectronics
LM338 (5 A): Texas Instruments , STMicroelectronics , Linear Technology
LM1086 / LD1086 / LT1086 (1,5 A, Low Dropout): Texas Instruments , STMicroelectronics , Linear Technology
LM1085 / LD1085 / LT1085 (3 A, Low Dropout): Texas Instruments , STMicroelectronics , Linear Technology , HTC
LM1084 / LD1084 / LT1084 (5 A, Low Dropout): Texas Instruments , STMicroelectronics , Linear Technology , HTC
LT1083 (7,5 A, Low Dropout): Linear Technology