LM7818I 查看數據表（PDF） - Fairchild Semiconductor

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LM7818I

3-TERMINAL 1A POSITIVE VOLTAGE REGULATORS

Fairchild Semiconductor 

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 IQ

VO = VXX (1+R2/R1)+IQR2

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