Data Sheet

Electrical characteristics L78LxxAB, L78LxxAC, L78LxxC
14/33 Doc ID 2145 Rev 21
T
J
= 0 to 125 °C for L78L12AC, T
J
= -40 to 125 °C for L78L12AB.
T
J
= 0 to 125 °C for L78L15AC, T
J
= -40 to 125 °C for L78L15AB.
Table 19. Electrical characteristics of L78L12AB and L78L12AC (V
I
= 19 V)
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
O
Output voltage T
J
= 25 °C 11.5 12 12.5 V
V
O
Output voltage
I
O
= 1 to 40 mA, V
I
= 14.5 to 27 V 11.4 12.6
V
I
O
= 1 to 70 mA, V
I
= 19 V 11.4 12.6
ΔV
O
Line regulation
V
I
= 14.5 to 27 V, T
J
= 25 °C 250
mV
V
I
= 16 to 27 V, T
J
= 25 °C 200
ΔV
O
Load regulation
I
O
= 1 to 100 mA, T
J
= 25 °C 100
mV
I
O
= 1 to 40 mA, T
J
= 25 °C 50
I
d
Quiescent current
T
J
= 25 °C 6.5 mA
T
J
= 125 °C 6 mA
ΔI
d
Quiescent current change
I
O
= 1 to 40 mA 0.1
mA
V
I
= 16 to 27 V 1.5
eN Output noise voltage B =10 Hz to 100 kHz, T
J
= 25 °C 80 µV
SVR Supply voltage rejection
V
I
= 15 to 25 V, f = 120 Hz
I
O
= 40 mA, T
J
= 25 °C
37 42 dB
V
d
Dropout voltage 1.7 V
Table 20. Electrical characteristics of L78L15AB and L78L15AC (V
I
= 23 V)
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
O
Output voltage T
J
= 25 °C 14.4 15 15.6 V
V
O
Output voltage
I
O
= 1 to 40 mA, V
I
= 17.5 to 30 V 14.25 15.75
V
I
O
= 1 to 70 mA, V
I
= 23 V 14.25 15.75
ΔV
O
Line regulation
V
I
= 17.5 to 30 V, T
J
= 25 °C 300
mV
V
I
= 20 to 30 V, T
J
= 25 °C 250
ΔV
O
Load regulation
I
O
= 1 to 100 mA, T
J
= 25 °C 150
mV
I
O
= 1 to 40 mA, T
J
= 25 °C 75
I
d
Quiescent current
T
J
= 25 °C 6.5 mA
T
J
= 125 °C 6 mA
ΔI
d
Quiescent current change
I
O
= 1 to 40 mA 0.1
mA
V
I
= 20 to 30 V 1.5
eN Output noise voltage B =10 Hz to 100 kHz, T
J
= 25 °C 90 µV
SVR Supply voltage rejection
V
I
= 18.5 to 28.5 V, f = 120 Hz
I
O
= 40 mA, T
J
= 25 °C
34 39 dB
V
d
Dropout voltage 1.7 V