Datasheet

LM7808C
Electrical Characteristics
0˚C ≤ T
J
≤ +150˚C, V
I
= 14V, I
O
= 500 mA, C
I
= 0.33 µF, C
O
= 0.1 µF, unless otherwise specified
Symbol Parameter Conditions (Note 6) LM7808C Units
Min Typ Max
V
O
Output Voltage T
J
= 25˚C 7.7 8.0 8.3 V
∆V
O
Line Regulation T
J
= 25˚C 10.5V ≤ V
I
≤ 25V 6.0 160 mV
11.0V ≤ V
I
≤ 17V 2.0 80
∆V
O
Load Regulation T
J
= 25˚C 5.0 mA ≤ I
O
≤ 1.5A 12 160 mV
250 mA ≤ I
O
≤ 750
mA
4.0 80
V
O
Output Voltage 11.5V ≤ V
I
≤ 23V, 5.0 mA ≤ I
O
≤ 1.0A, P ≤ 15W 7.6 8.4 V
I
Q
Quiescent Current T
J
= 25˚C 4.3 8.0 mA
∆I
Q
Quiescent With Line 11.5V ≤ V
I
≤ 25V 1.0 mA
Current Change With Load 5.0 mA ≤ I
O
≤ 1.0A 0.5
V
N
Noise T
A
= 25˚C, 10 Hz ≤ f ≤ 100 kHz 52 µV
∆V
I
/∆V
O
Ripple Rejection f = 120 Hz, I
O
= 350 mA, T
J
= 25˚C 56 72 dB
V
DO
Dropout Voltage I
O
= 1.0A, T
J
= 25˚C 2.0 V
R
O
Output Resistance f = 1.0 kHz 16 mΩ
I
OS
Output Short Circuit Current T
J
= 25˚C, V
I
= 35V 0.45 A
I
PK
Peak Output Current T
J
= 25˚C 2.2 A
∆V
O
/∆T Average Temperature I
O
= 5.0 mA 0.8 mV/˚C
Coefficient of Output Voltage
Note 6: All characteristics are measured with a 0.22 µF capacitor from input to ground and a 0.1 µF capacitor from output to ground. All characteristics except noise
voltage and ripple rejection ratio are measured using pulse techniques (t
w
≤ 10 ms, duty cycle ≤ 5%). Output voltage changes due to changes in internal temperature
must be taken into account separately.
LM340/LM78XX
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