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Linear Voltage Regulator – 7809

Rev

2.0

18/07/25

Pad Layout and Functions

Typical Application

VOUT

7809

CI

0.33µf

CO

≥0.1µf

VIN

CI is required if the regulator is located an appreciable distance from power supply filter. CO is not required for stability; however it does improve

transient response. For optimum stability and transient response locate CI CO as close as possible to the regulator. A common ground is required

between the input and the output voltages. The input voltage must remain typically 2.0 V above the output voltage even during the low point on the

input ripple voltage.

3, 4

2

1

1860µm (73.23mils)

(0,0)

PAD

FUNCTION

COORDINATES (µm)

X

Y

1

VIN

-400.5

526.5

2

GND

730.5

567

3

VOUT

-345.5

-657.5

4

VOUT

-554.5

-541.5

CONNECT CHIP BACK TO GND

1

2

3

4

DIE ID