Datasheet

LM340-N, LM78xx
SNOSBT0J –FEBRUARY 2000–REVISED DECEMBER 2013 www.ti.com
LM340A Electrical Characteristics
I
OUT
= 1A, 0°C ≤ T
J
≤ + 125°C (LM340A) unless otherwise specified
(1)
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
V
O
Output T
J
= 25°C 4.9 5 5.1 11.75 12 12.25 14.7 15 15.3 V
Voltage
P
D
≤ 15W, 5 mA ≤ I
O
≤ 1A 4.8 5.2 11.5 12.5 14.4 15.6 V
V
MIN
≤ V
IN
≤ V
MAX
(7.5 ≤ V
IN
≤ 20) (14.8 ≤ V
IN
≤ 27) (17.9 ≤ V
IN
≤ 30) V
ΔV
O
Line I
O
= 500 mA 10 18 22 mV
Regulation
ΔV
IN
(7.5 ≤ V
IN
≤ 20) (14.8 ≤ V
IN
≤ 27) (17.9 ≤ V
IN
≤ 30) V
T
J
= 25°C 3 10 4 18 4 22 mV
ΔV
IN
(7.5 ≤ V
IN
≤ 20) (14.5 ≤ V
IN
≤ 27) (17.5 ≤ V
IN
≤ 30) V
T
J
= 25°C 4 9 10 mV
Over Temperature 12 30 30 mV
ΔV
IN
(8 ≤ V
IN
≤ 12) (16 ≤ V
IN
≤ 22) (20 ≤ V
IN
≤ 26) V
ΔV
O
Load T
J
= 5 mA ≤ I
O
≤ 1.5A 10 25 12 32 12 35 mV
Regulation 25°C
250 mA ≤ I
O
≤ 15 19 21 mV
750 mA
Over Temperature, 25 60 75 mV
5 mA ≤ I
O
≤ 1A
I
Q
Quiescent T
J
= 25°C 6 6 6 mA
Current
Over Temperature 6.5 6.5 6.5 mA
ΔI
Q
Quiescent 5 mA ≤ I
O
≤ 1A 0.5 0.5 0.5 mA
Current
T
J
= 25°C, I
O
= 1A 0.8 0.8 0.8 mA
Change
V
MIN
≤ V
IN
≤ V
MAX
(7.5 ≤ V
IN
≤ 20) (14.8 ≤ V
IN
≤ 27) (17.9 ≤ V
IN
≤ 30) V
I
O
= 500 mA 0.8 0.8 0.8 mA
V
MIN
≤ V
IN
≤ V
MAX
(8 ≤ V
IN
≤ 25) (15 ≤ V
IN
≤ 30) (17.9 ≤ V
IN
≤ 30) V
V
N
Output Noise T
A
= 25°C, 10 Hz ≤ f ≤ 100 40 75 90 μV
Voltage kHz
Ripple T
J
= 25°C, f = 120 Hz, I
O
= 68 80 61 72 60 70 dB
Rejection 1A
or f = 120 Hz, I
O
= 500 mA, 68 61 60 dB
Over Temperature,
V
MIN
≤ V
IN
≤ V
MAX
(8 ≤ V
IN
≤ 18) (15 ≤ V
IN
≤ 25) (18.5 ≤ V
IN
≤ 28.5) V
R
O
Dropout T
J
= 25°C, I
O
= 1A 2.0 2.0 2.0 V
Voltage
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 Min, T
J
= 0°C, I
O
= 5 mA −0.6 −1.5 −1.8 mV/°C
of V
O
V
IN
Input Voltage T
J
= 25°C
Required to
7.5 14.5 17.5 V
Maintain Line
Regulation
(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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