7450 データシートの表示（PDF） - Holtek Semiconductor

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7450

Negative Voltage Regulator

Holtek Semiconductor 

Circuit for increasing output voltage

V IN

V IN

0 6%": :

V OUT

S e r ie s

C1

C2

10mF

GND

10mF

IS S

V OUT

V XX

R1

R2

C om m on

S in g le p o in t G N D

C om m on

VOUT

= VXX

(1+

R2

R1

)

+

I SS R2

Circuit for increasing output voltage

V IN

V IN

C1

10mF

C om m on

0 6%": :

V OUT

S e r ie s

C2

GND

10mF

IS S

D1

S in g le p o in t G N D

V OUT

V XX

R1

C om m on

HT74XX

Constant current regulator

VOUT = VXX + VD1

V IN

V IN

0 6%": :

V OUT

S e r ie s

C1

10mF

GND

C2

10mF

V XX

RA

IS S

IO U T

RL

C om m on

I OUT

= VXX

RA

+ I SS

5

January 26, 2000

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