Datasheet

LM120, LM320-N
SNVS756C –APRIL 1998–REVISED APRIL 2013 www.ti.com
LM320T-15 ELECTRICAL CHARACTERISTICS
Power Plastic Package
Order Numbers
LM320T-15
(TO-220)
Units
Design Output Current (I
D
) 1A
Device Dissipation (P
D
) 15W
Parameter Conditions
(1)
Min Typ Max
Output Voltage T
J
= 25°C, V
IN
= 20V, −15.5 −15 −14.5 V
I
LOAD
= 5 mA
Line Regulation T
J
= 25°C, I
LOAD
= 5 mA, 5 20 mV
V
MIN
≤ V
IN
≤ V
MAX
Input Voltage −35 −17.5 V
Ripple Rejection f = 120 Hz 56 80 dB
Load Regulation, T
J
= 25°C, V
IN
= 20V, 30 80 mV
(2)
5 mA ≤ I
LOAD
≤ I
D
Output Voltage, 17.5V ≤ V
IN
≤ V
MAX
, −15.7 −14.3 V
(1)
5 mA ≤ I
LOAD
≤ I
D
, P ≤ P
D
Quiescent Current V
MIN
≤ V
IN
≤ V
MAX
2 4 mA
Quiescent Current T
J
= 25°C
Change V
MIN
≤ V
IN
≤ V
MAX
0.1 0.4 mA
5 mA ≤ I
LOAD
≤ I
D
0.1 0.4 mA
Output Noise Voltage T
A
= 25°C, C
L
= 1 μF, I
L
= 5 mA, 400 μV
V
IN
= 20V, 10 Hz ≤ f ≤ 100 kHz
Long Term Stability 30 mV
Thermal Resistance
Junction to Case 4 °C/W
Junction to Ambient 50 °C/W
(1) This specification applies over −55°C ≤ T
J
≤ +150°C for the LM120 and 0°C ≤ T
J
≤ +125°C for the LM320-N.
(2) Regulation is measured at constant junction temperature. Changes in output voltage due to heating effects must be taken into account
separately. To ensure constant junction temperature, low duty cycle, pulse testing is used. The LM120/LM320-N series does have low
thermal feedback, improving line and load regulation. On all other tests, even though power dissipation is internally limited, electrical
specifications apply only up to P
D
.
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