L7809AB datasheet(9/17 Pages) STMICROELECTRONICS

9 / 17 page

ELECTRICAL CHARACTERISTICS FOR L7812A (Vi = 19V, Io = 1 A, Tj = 0 to 125

oC (L7812AC),

Tj = -40 to 125

oC (L7812AB) unless otherwise specified)

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Output Voltage

Tj =25

11.75

12.25

Output Voltage

Io = 5 mA to 1 A

≤ 15 W

Vi = 14.8 to 27 V

11.5

12.5

∆Vo*

Line Regulation

Vi = 14.8 to 30 V

Io = 500 mA

Vi =16 to 22 V

Tj =25

Vi = 14.5 to 27 V

Tj =25

120

∆Vo*

Load Regulation

Io = 5 mA to 1 A

Io = 5 mA to 1.5 A

Tj =25

Io = 250 to 750 mA

100

Quiescent Current

Tj =25

oC4.4

∆Id

Quiescent Current Change

Vi =15 to 30 V

Io = 500 mA

Vi = 14.8 to 27 V

Tj =25

Io = 5 mA to 1 A

0.8

0.5

SVR

Supply Voltage Rejection

Vi = 15 to 25 V

f = 120 Hz

Io = 500 mA

Dropout Voltage

Io =1 A

Tj =25

oC2

Output Noise Voltage

B = 10Hz to 100KHz

Tj =25

oC10

µV/Vo

Output Resistance

f = 1KHz

Ω

Isc

Short Circuit Current

Vi =35 V

Tamb =25

oC0.2

Iscp

Short Circuit Peack Current

Tj =25

oC2.2

∆Vo

∆T

Output Voltage Drift

-1

mV/

* Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into account

separately. Pulse testing with low duty cycle is used.

L7800AB/AC

9/17

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