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CS8121

5V, 1A Linear Regulator with RESET and ENABLE

ON Semiconductor 

PACKAGE LEAD #

7 Lead

D2PAK

5 Lead TO-220

1

2

1

3

2

4

3

5

4

6

5

7

Package Lead Description

LEAD SYMBOL

FUNCTION

NC

VIN

ENABLE

Gnd

RESET

VOUT

VOUT(SENSE)

No Connection.

Supply voltage to IC, usually direct from the battery.

CMOS compatible logical. VOUT is disabled i.e. placed in a

high impedance state when ENABLE is high.

Ground connection.

CMOS compatible output lead. RESET goes low whenever

VOUT falls out of regulation. The RESET delay is externally

programmed.

Regulated output voltage, 5V (typ).

Remote sensing of output voltage.

Typical Performance Characteristics

Output Voltage vs. Temperature

Load Regulation vs. Output Current Over Temperature

5.02

5.01

5

4.99

4.98

5.00V @ 25˚C

IOUT = 100mA

4.97

4.96

4.95

-40 -20 0

20 40 60 80 100 120 140 150

Junction Temperature (˚C)

0

-5

-10

-15

-20

-25

-30

-35

-40

-45

-50

0

125°C

–40°C

25°C

VIN =14V

200

400

600

800

1A

IOUT (A)

Line Regulation vs. Output Current Over Temperature

50

VIN = 7 to 26V

40

30

20

125˚C

25˚C

10

-40˚C

0

-10

0

0.2

0.4

0.6

IOUT(A)

0.8

1A

Dropout Voltage vs. Output Current Over Temperature

1.5

1.4

1.3

1.2

1.1

1.0

0.9

-40°C

0.8

0.7

25°C

0.6

125°C

0.5

0.4

0.3

0.2

0.1

0.0

0

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

IOUT (A)

3

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