L78S12CV 2A Positive Fixed Voltage Regulator

Code: UJ56L

  • Fixed voltage regulator
  • Positive fixed
  • 2A
  • 15V
  • 500mA Short circuit current
  • TO Style case
  • ±4% Tolerance

Product details

L78S12CV 2A Positive Fixed Voltage Regulator

  • Fixed voltage regulator 
  • Positive fixed
  • 2A
  • 15V
  • 500mA Short circuit current 
  • TO Style case 
  • ±4% Tolerance 


This positive fixed voltage regulator has a quiescent current of 8mA, a short circuit current of 500 mA, a ripple rej. of between 46 and 54dB and is housed in a TO220 style case. The output voltage has a tolerance of ±4%. The input voltage range has an upper limit of +35V.

Type No. Output Line Load Input Output
Voltage Reg. Reg. Voltage Noise
(typ.) (max.) (max.) Range
78S12 +12V 240mV 150mV +15V 75

When it says positive does that mean the ground needs to be positive. I want to use it to stabalise an LED stiplight. Voltage is from batteries that has variable voltage 12 - 14V approx and negative ground.

Asked by: Alan
Yes, this would require a positive ground, unfortunately we do not currently have any negative ground regulators with the same specification to offer as an alternative.
Answered by: Gareth
Date published: 2016-08-23

Please (a) add connection diagram (+, - and output) and (b) confirm minimum input potential is +15 V

Asked by: henrym
This can be found in the link below http://www.st.com/web/en/resource/technical/document/datasheet/CD00000449.pdf
Answered by: Dominic
Date published: 2015-09-07
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Bulk Prices

Item code Item name Quantity Price
UJ56L L78S12CV 2A Positive Fixed Voltage Regulator (1+) £0.59

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