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LT1085M Datasheet, PDF (2/3 Pages) Seme LAB – 3 AMP POSITIVE VOLTAGE REGULATOR
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LT1085M
MILITARY VERSION
ELECTRICAL CHARACTERISTICS (TJ = 25°C Unless otherwise stated)
Parameter
Output
Voltage Test Conditions 1,2
Min.
3.3
VIN – VOUT = 6.3V
IO = 10mA to 3A
IO = 10mA
TJ = Over Temp 3
3.267
3.234
VO 4
Output Voltage
5
VIN – VOUT = 8V
IO = 10mA to 3A
IO = 10mA
TJ = Over Temp 3
4.95
4.90
12
VIN – VOUT = 15V
IO = 10mA to 3A
IO = 10mA
TJ = Over Temp 3
11.88
11.76
VREF 4
Reference Voltage
ADJ.
VIN – VOUT = VO + 3V
IO = 10mA to 3A
IO = 10mA
TJ = Over Temp 3
1.238
1.225
VIN – VOUT = 1.5 to 15V TJ = 25°C
REG(LINE) 4 Line Regulation
IO = 10mA
VIN – VOUT = 1.5 to 35V
TJ = Over Temp 3
IO = 10mA
TJ = Over Temp 3
REG(LOAD) 4 Load Regulation
VD
Dropout Voltage
VIN – VOUT = 3V
VIN – VOUT = 3V
DVOUT , DVREF = 1%
TJ = 25°C
TJ = Over Temp 3
TJ = Over Temp 3
ICL
Current Limit
VIN – VOUT = 5V
VIN – VOUT = 25V
TJ = Over Temp 3
3.2
TJ = Over Temp 3
0.2
IQ
Quiescent Current
VIN – VOUT = 35V
TJ = Over Temp 3
REG(THERM) Thermal Regulation
tp = 30ms
TJ = 25°C
IPIN
DIPIN
Adjust Pin Current
Adjust Pin Current Change
TJ = 25°C
TJ = Over Temp 3
TJ = Over Temp 3
TS
Temperature Stability
VIN – VOUT = 5V
TJ = Over Temp 3
IO = 0.5A
IO
Minimum Load Current
VIN – VOUT = 25V
TJ = Over Temp 3
IO = 0.5A
VN
RMS Output Noise 5
TJ = 25°C
RA
Ripple Rejection Ratio 6
VIN – VOUT = 3V
TJ = Over Temp 3
IO = 3A
60
Typ.
3.3
3.3
5
5
12
12
1.25
1.25
0.015
0.035
0.05
0.1
0.2
1.3
4.0
0.002
55
0.2
0.5
5
0.003
75
Max.
3.333
3.366
5.05
5.10
12.12
12.24
1.262
1.270
0.2
Unit
V
V
%
0.6
%
0.3
%
0.4
1.5
V
A
0.5
10
mA
0.01 % / W
mA
120
5
mA
%
10
mA
%VO
dB
Notes
1. Test Conditions unless otherwise stated: VIN = 1.5 to 35V, or Maximum Input, whichever is less.
IO = 10mA to 3A.
2. These specifications are only applicable for power dissipations of 30 Watts over a limited range of VIN – VOUT.
3. Over Temp. = Over specified Junction Temperature Range (See Absolute Maximum Ratings).
4. Low duty cycle pulse test with Kelvin connections required. Changes in output voltage are covered under the specification
for thermal regulation.
5. Bandwidth of 10Hz to 10kHz.
6. 120Hz input ripple, 15V = 64dB min. COUT (CADJ) = 25mF.
Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk
Prelim. 4/95
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