KA317TU 데이터 시트보기 (PDF) - Fairchild Semiconductor

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KA317TU

3-Terminal Positive Adjustable Regulator

Fairchild Semiconductor 

LM317

Typical Application

VI

Input

Ci

0. 1µF

VI LKMA331177 Vo

Vadj

R1

Iadj

R2 Iadj

Output

Co

1µF

VO = 1.25V (1+ R 2/ R1)+Iadj R2

Figure 5. Programmable Regulator

Ci is required when regulator is located an appreciable distance from power supply filter.

Co is not needed for stability, however, it does improve transient response.

Since IADJ is controlled to less than 100µA, the error associated with this term is negligible in most applications.

4

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