LM1085 Datasheet, PDF (4/22 Pages) National Semiconductor (TI) – 3A Low Dropout Positive Regulators

LM1085
SNVS038G – JULY 1999 – REVISED MARCH 2013
www.ti.com
Electrical Characteristics (continued)
Limits in standard type are for T_J = 25°C only; limits in boldface type apply over the operating junction temperature (T_J)
range of -40°C to +125°C. Minimum and Maximum limits are ensured through test, design, or statistical correlation. Typical
values represent the most likely parametric norm at T_J = 25°C, and are provided for reference purposes only.
Symbol
Parameter
Conditions
Min
(1)
Typ
(2)
Max
(1)
Units
ΔV_OUT
ΔV_OUT
V_DO
I_LIMIT
I_GND
I_ADJ
ΔI_ADJ
θ_JC
LM1085-ADJ, I_OUT =10mA, 1.5V≤ (V_IN-V_OUT) ≤ 15V
Line Regulation
(4)
LM1085-3.3, I_OUT = 0mA, 4.8V ≤ V_IN ≤ 15V
LM1085-5.0, I_OUT = 0mA, 6.5V ≤ V_IN ≤ 20V
Load Regulation
(4)
LM1085-12, I _OUT =0mA, 13.5V ≤ V_IN ≤ 25V
LM1085-ADJ, (V_IN-V _OUT) = 3V, 10mA ≤ I_OUT ≤ I_FULL
LOAD
LM1085-3.3, V_IN = 5V, 0 ≤ I_OUT ≤ I_{FULL LOAD}
LM1085-5.0, V_IN = 8V, 0 ≤ I_OUT ≤ I_{FULL LOAD}
LM1085-12, V_IN = 15V, 0 ≤ I_OUT ≤ I_{FULL LOAD}
Dropout Voltage ⁽⁵⁾
Current Limit
Minimum Load
Current ⁽⁶⁾
Quiescent Current
Thermal Regulation
Ripple Rejection
Adjust Pin Current
Adjust Pin Current
Change
Temperature Stability
Long Term Stability
RMS Output Noise
(% of V_OUT)
Thermal Resistance
(Junction-to-Case)
LM1085-ADJ, 3.3, 5, 12
ΔV_REF, ΔV_OUT = 1%, I_OUT = 3A
LM1085-ADJ, V_IN−V_OUT = 5V
LM1085-ADJ, V_IN−V_OUT = 25V
LM1085-3.3, V_IN = 8.0V
LM1085-5.0, V_IN = 10V
LM1085-12, V_IN = 17V
LM1085-ADJ, V_IN −V_OUT = 25V
LM1085-3.3, V_IN ≤ 18V
LM1085-5.0, V_IN ≤ 20V
LM1085-12, V_IN ≤ 25V
T_A = 25°C, 30ms Pulse
f_RIPPLE = 120Hz, C_OUT = 25µF Tantalum, I_OUT = 3A
LM1085-ADJ
C_ADJ = 25µF, (V_IN−V_O) = 3V
LM1085-3.3, V_IN = 6.3V
LM1085-5.0, V_IN = 8.0V
LM1085-12, V_IN = 15V
LM1085–ADJ
LM1085–ADJ
10mA ≤ I_OUT ≤ I_{FULL LOAD}, 1.5V ≤ V_IN−V_OUT ≤ 25V
T_A= 125°C, 1000 Hrs
10Hz ≤ f ≤ 10 kHz
3-Lead DDPAK/TO-263
3-Lead TO-220
0.015
0.035
0.5
1.0
0.5
1.0
1.0
2.0
0.1
0.2
3
7
5
10
12
24
0.2
0.2
%
6
6
mV
10
10
mV
25
25
mV
0.3
0.4
%
15
20
mV
20
35
mV
36
72
mV
1.3
1.5
V
3.2
5.5
A
0.2
0.5
3.2
5.5
A
3.2
5.5
A
3.2
5.5
A
5.0
10.0
mA
5.0
10.0
mA
5.0
10.0
mA
5.0
10.0
mA
.004
0.02
%/W
60
75
dB
60
72
dB
60
68
dB
54
60
dB
55
120
µA
0.2
5
µA
0.5
%
0.3
1.0
%
0.003
%
-
0.7
-
°C/W
-
0.7
-
(4) Load and line regulation are measured at constant junction temperature, and are ensured up to the maximum power dissipation of 30W.
Power dissipation is determined by the input/output differential and the output current. Ensured maximum power dissipation will not be
available over the full input/output range.
(5) Dropout voltage is specified over the full output current range of the device.
(6) The minimum output current required to maintain regulation.
4
Submit Documentation Feedback
Product Folder Links: LM1085
Copyright © 1999–2013, Texas Instruments Incorporated