LM120, LM320-N
SNVS756C –APRIL 1998–REVISED APRIL 2013
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LM320T-15 ELECTRICAL CHARACTERISTICS
Power Plastic Package
Order Numbers
LM320T-15
(TO-220)
Units
Design Output Current (ID)
1A
Device Dissipation (PD)
15W
(1)
Parameter
Output Voltage
Conditions
TJ = 25°C, VIN = 20V,
Min
Typ
Max
−15.5
−15
−14.5
V
ILOAD = 5 mA
Line Regulation
TJ = 25°C, ILOAD = 5 mA,
5
20
mV
VMIN ≤ VIN ≤ VMAX
Input Voltage
−35
−17.5
80
V
Ripple Rejection
f = 120 Hz
56
80
30
dB
mV
Load Regulation,
(2)
TJ = 25°C, VIN = 20V,
5 mA ≤ ILOAD ≤ ID
Output Voltage,
(1)
17.5V ≤ VIN ≤ VMAX
5 mA ≤ ILOAD ≤ ID, P ≤ PD
MIN ≤ VIN ≤ VMAX
TJ = 25°C
MIN ≤ VIN ≤ VMAX
,
−15.7
−14.3
4
V
Quiescent Current
Quiescent Current
Change
V
2
mA
V
0.1
0.1
400
0.4
0.4
mA
mA
μV
5 mA ≤ ILOAD ≤ ID
Output Noise Voltage
TA = 25°C, CL = 1 μF, IL = 5 mA,
VIN = 20V, 10 Hz ≤ f ≤ 100 kHz
Long Term Stability
Thermal Resistance
Junction to Case
30
mV
4
°C/W
°C/W
Junction to Ambient
50
(1) This specification applies over −55°C ≤ TJ ≤ +150°C for the LM120 and 0°C ≤ TJ ≤ +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 PD.
8
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