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LM7812A Datasheet(HTML) 24 Page - Fairchild Semiconductor

Part No. LM7812A
Description  3-TERMINAL 1A POSITIVE VOLTAGE REGULATORS
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Maker  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
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LM7812A Datasheet(HTML) 24 Page - Fairchild Semiconductor

 
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LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
Fig. 8 Fixed Output Regulator
Fig. 9 Constant Current Regulator
Notes:
(1) To specify an output voltage. substitute voltage value for "XX."
A common ground is required between the input and the Output
voltage. The input voltage must remain typically 2.0V above the output
voltage even during the low point on the input ripple voltage.
(2) CI is required if regulator is located an appreciable distance from
power Supply filter.
(3) CO improves stability and transient response.
Fig. 10 Circuit for Increasing Output Voltage
Fig. 11 Adjustable Output Regulator (7 to 30V)
IRI
≥ 5 I
Q
VO = VXX (1+R2/R1)+IQR2


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