Datasheet
LM340-N, LM78xx
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SNOSBT0J –FEBRUARY 2000–REVISED DECEMBER 2013
LM340-N Electrical Characteristics
(1)
(continued)
0°C ≤ T
J
≤ +125°C unless otherwise specified
Output Voltage 5V 12V 15V
Symbol Input Voltage (unless otherwise noted) 10V 19V 23V Units
Parameter Conditions Min Typ Max Min Typ Max Min Typ Max
R
O
Dropout Voltage T
J
= 25°C, I
O
= 1A 2.0 2.0 2.0 V
Output f = 1 kHz 8 18 19 mΩ
Resistance
Short-Circuit T
J
= 25°C 2.1 1.5 1.2 A
Current
Peak Output T
J
= 25°C 2.4 2.4 2.4 A
Current
Average TC of 0°C ≤ T
J
≤ +125°C, I
O
= 5 −0.6 −1.5 −1.8 mV/°C
V
OUT
mA
V
IN
Input Voltage T
J
= 25°C, I
O
≤ 1A
Required to
7.5 14.6 17.7 V
Maintain Line
Regulation
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
(1)
LM7808C Units
Min Typ Max
V
O
Output Voltage T
J
= 25°C 7.7 8.0 8.3 V
ΔV
O
Line Regulation T
J
= 25°C 10.5V ≤ V
I
≤ 25V 6.0 160 mV
11.0V ≤ V
I
≤ 17V 2.0 80
ΔV
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
ΔI
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
ΔV
I
/ΔV
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
ΔV
O
/ΔT Average Temperature Coefficient of I
O
= 5.0 mA
0.8 mV/°C
Output Voltage
(1) 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.
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