Data Sheet

MC78LXXA / LM78LXXA — 3-Terminal 0.1 A Positive Voltage Regulator
© 2002 Fairchild Semiconductor Corporation www.fairchildsemi.com
MC78LXXA / LM78LXXA Rev. 1.9 6
Electrical Characteristics (MC78L12A / LM78L12A)
V
I
= 19 V, I
O
= 40 mA, -40°C ≤ T
J
≤ 125°C, C
I
= 0.33 μF, C
O
= 0.1 μF, unless otherwise specified.
Notes:
7. The maximum steady-state usable output current and input voltage are very dependent on the heat sinking and/or
lead length of the package. The data above represents pulse test conditions with junction temperature as indicated
at the initiation of tests.
8. Power dissipation P
D
≤ 0.75 W.
Symbol Parameter Conditions Min. Typ. Max. Unit
V
O
Output Voltage T
J
= 25°C 11.5 12.0 12.5 V
ΔV
O
Line Regulation
(7)
T
J
= 25°C
14.5 V ≤ V
I
≤ 27 V 20 250 mV
16 V ≤ V
I
≤ 27 V 15 200 mV
ΔV
O
Load Regulation
(7)
T
J
= 25°C
1 mA ≤ I
O
≤ 100 mA 20 100 mV
1 mA ≤ I
O
≤ 40 mA 10 50 mV
V
O
Output Voltage
14.5 V ≤ V
I
≤ 27 V 1 mA ≤ I
O
≤ 40 mA 11.4 12.6 V
14.5 V ≤ V
I
≤ V
MAX
(8)
1 mA ≤ I
O
≤ 70 mA 11.4 12.6 V
I
Q
Quiescent Current T
J
= 25°C2.16.0mA
ΔI
Q
Quiescent
Current Change
With Line 16 V ≤ V
I
≤ 27 V 1.5 mA
ΔI
Q
With Load 1 mA ≤ I
O
≤ 40 mA 0.1 mA
V
N
Output Noise Voltage T
A
= 25°C, 10 Hz ≤ f ≤ 100 kHz 80 μV/Vo
ΔV
O
/ΔT Temperature Coefficient of V
O
I
O
= 5 mA -1.0 mV/°C
RR Ripple Rejection f = 120 Hz, 15 V ≤ V
I
≤ 25 V, T
J
= 25°C3765 dB
V
D
Dropout Voltage T
J
= 25°C1.7V