Table 19. Electrical characteristics of L78L15AB and L78L15AC - Refer to the test circuits, TJ = 0 to 125 °C (AC) TJ = -40

to 125 °C (AB), VI = 23 V,IO= 40 mA, CI = 0.33 μF, CO = 0.1 μF unless otherwise specified

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VO

Output voltage

TJ = 25 °C

14.4

15

15.6

V

VO

Output voltage

IO = 1 to 40 mA, VI = 17.5 to 30 V

14.25

15.75

V

IO = 1 to 70 mA, VI = 23 V

14.25

15.75

∆VO

Line regulation

VI = 17.5 to 30 V, TJ = 25 °C

300

mV

VI = 20 to 30 V, TJ = 25 °C

250

∆VO

Load regulation

IO = 1 to 100 mA, TJ = 25 °C

150

mV

IO = 1 to 40 mA, TJ = 25 °C

75

Id

Quiescent current

TJ = 25 °C

6.5

mA

TJ = 125 °C

6

mA

∆Id

Quiescent current change

IO = 1 to 40 mA

0.1

mA

VI = 20 to 30 V

1.5

eN

Output noise voltage

B = 10 Hz to 100 kHz, TJ = 25 °C

90

µV

SVR

Supply voltage rejection

VI = 18.5 to 28.5 V, f = 120 Hz

IO = 40 mA, TJ = 25 °C

34

39

dB

Vd

Dropout voltage

1.7

V

Table 20. Electrical characteristics of L78L18AC - Refer to the test circuits, TJ = 0 to 125 °C (AC) TJ = -40 to 125 °C

(AB),VI = 27 V, IO = 40 mA, CI = 0.33 μF, CO = 0.1 μF unless otherwise specified

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VO

Output voltage

TJ = 25 °C

17.3

18

18.7

V

VO

Output voltage

IO = 1 to 40 mA, VI = 22 to 33 V

17.1

18.9

V

IO = 1 to 70 mA, VI = 27 V

17.1

18.9

∆VO

Line regulation

VI = 22 to 33 V, TJ = 25 °C

320

mV

VI = 22 to 33 V, TJ = 25 °C

270

∆VO

Load regulation

IO = 1 to 100 mA, TJ = 25 °C

170

mV

IO = 1 to 40 mA, TJ = 25 °C

85

Id

Quiescent current

TJ = 25 °C

6.5

mA

TJ = 125 °C

6

mA

∆Id

Quiescent current change

IO = 1 to 40 mA

0.1

mA

VI = 23 to 33 V

1.5

eN

Output noise voltage

B = 10 Hz to 100 kHz, TJ = 25 °C

120

µV

SVR

Supply voltage rejection

VI = 23 to 33 V, f = 120 Hz

IO = 40 mA, TJ = 25 °C

33

38

dB

Vd

Dropout voltage

1.7

V

L78L

Electrical characteristics

DS0424 - Rev 28

page 13/40