LM317T 参数 Datasheet PDF下载

LM317T (KA317)

Typical Application

V

I

VI

KA317

Vadj

Vo

R

1

C

i

0.1µF

I

adj

R

2

adj

C

o

0.1µF

Vo = 1.25V (1 + R

2

/R

1

) + I

adj

R

2

Fig. 5 Programmable Regulator

C

i

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

C

o

improves transient response by reducing AC noise which is present at the output.

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

©2000 Fairchild Semiconductor International

Rev. B, May 2000