Data Sheet

MC78LXXA / LM78LXXA — 3-Terminal 0.1 A Positive Voltage Regulator
© 2002 Fairchild Semiconductor Corporation www.fairchildsemi.com
MC78LXXA / LM78LXXA Rev. 1.9 7
Electrical Characteristics (MC78L15A)
V
I
= 23 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:
9. 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.
10. Power dissipation P
D
≤ 0.75 W.
Symbol Parameter Conditions Min. Typ. Max. Unit
V
O
Output Voltage T
J
= 25°C 14.4 15.0 15.6 V
ΔV
O
Line Regulation
(9)
T
J
= 25°C
17.5 V ≤ V
I
≤ 30 V 25 300 mV
20 V ≤ V
I
≤ 30 V 20 250 mV
ΔV
O
Load Regulation
(9)
T
J
= 25°C
1 mA ≤ I
O
≤ 100 mA 25 150 mV
1 mA ≤ I
O
≤ 40 mA 12 75 mV
V
O
Output Voltage
17.5 V ≤ V
I
≤ 30 V 1 mA ≤ I
O
≤ 40 mA 14.25 15.75 V
17.5 V ≤ V
I
≤ V
MAX
(10)
1 mA ≤ I
O
≤ 70 mA 14.25 15.75 V
I
Q
Quiescent Current T
J
= 25°C2.16.0mA
ΔI
Q
Quiescent
Current Change
With Line 20 V ≤ V
I
≤ 30 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 90 μV/Vo
ΔV
O
/ΔT Temperature Coefficient of V
O
I
O
= 5 mA -1.3 mV/°C
RR Ripple Rejection f = 120 Hz, 18.5 V ≤ V
I
≤28.5 V, T
J
= 25°C3460 dB
V
D
Dropout Voltage T
J
= 25°C1.7V