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LAB
FEATURES
INPUT SAFE AREA PROTECT ION
SEME
LT1084M
MILITARY VERSION
5 AMP POSITIVE VOLTAGE REGULATOR
* * * * * * * Low Dropout Performance Fixed or Adjustable Voltages Fixed Output Voltages of 3.3V, 5V & 12V Adjustable Output Voltage Range From 1.2V Line Regulation 0.015% / V Typical. Load Regulation 0.01% Typical. Available in Hermetically Sealed TO-3, SMD1 and TO-257 (isolated & non-isolated) Packages. * Military Temperature Range (-55 to +150C)
DEVICE(1) LT1084MK-XX LT1084MG-XX LT1084MIG-XX LT1084MSM-XX PACKAGE TO-3 TO-257 Isolated TO-257 SMD1
CU RR EN T LIMITING AMPLIFIER
L IM I T OU TPUT
SEN SE
T H E R M AL O V ER L O AD
VOL T AGE REGUL ATION AMPLIFIER
VR E F
ADJUST
DESCRIPTION
The LT1084 voltage regulators are monolithic Note integrated circuits designed for use in applications 1) -XX = Voltage Option: 3.3, 5 or 12 requiring a well regulated positive output voltage -XX = Left blank for Adjustable Option. with low input-output differential voltage. Features include full power usage of up to 5A load current, internal current limiting and thermal shutdown. Safe area protection on the die is also included, providing protection of the series pass Darlington transistor under most conditions. The hermetically sealed TO-3 packages are utilised for high reliablitiy and low thermal resistance, whilst the SMD1 package is designed for surface mount applications.
ABSOLUTE MAXIMUM RATINGS (Tcase = 25C unless otherwise stated)
VIN PD RqJC RqJC RqJC TJ TSTG TLEAD Input - Output Voltage Differential Power Dissipation Thermal Resistance Junction To Case Thermal Resistance Junction To Case Thermal Resistance Junction To Case Operating Junction Temperature Range Storage Temperature Range Lead Temperature (for 10 sec.)
Telephone +44(0)1455 556565. Fax +44(0)1455 552612. E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk
35V Internally limited * TO-3 TO-3 SMD1 SMD1 TO-257 TO-257 Control Power Control Power Control Power Control Power 0.76C / W 2.3C / W 0.79C / W 4.0C / W 0.79C / W 4.0C / W -55 to 150C -55 to 200C -65 to 150C 300C
Prelim. 7/00
* These ratings are only applicable for power dissipations of 30 Watts over a limited range of VIN - VOUT.
Semelab plc.
LAB
ELECTRICAL CHARACTERISTICS
Parameter
SEME
LT1084M
MILITARY VERSION
(TJ = 25C Unless otherwise stated)
1,2
Output Voltage Test Conditions
3.3 VIN - VOUT = 6.3V IO = 10mA to 5A VIN - VOUT = 8V IO = 10mA to 5A VIN - VOUT = 15V IO = 10mA to 5A
Min.
IO = 10mA TJ = Over Temp IO = 10mA TJ = Over Temp IO = 10mA TJ = Over Temp IO = 10mA TJ = Over Temp TJ = 25C TJ = Over Temp IO = 10mA TJ = 25C TJ = Over Temp TJ = Over Temp TJ = Over Temp TJ = Over Temp TJ = Over Temp TJ = 25C
3 3 3 3 3 3 3 3 3 3
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
Max.
3.333 3.366 5.05 5.10 12.12 12.24 1.262 1.270 0.2
Unit
3.267 3.234 4.95 4.90 11.88 11.76 1.238 1.225
VO
4
Output Voltage
5
V
12
VREF
4
Reference Voltage
ADJ.
VIN - VOUT = VO + 3V IO = 10mA to 5A VIN - VOUT = 1.5 to 15V IO = 10mA VIN - VOUT = 1.5 to 35V TJ = Over Temp
3
V
%
REG(LINE)
4
Line Regulation
0.5 0.3 0.4 1.5
%
REG(LOAD) VD ICL IQ
4
Load Regulation Dropout Voltage Current Limit Quiescent Current
VIN - VOUT = 3V VIN - VOUT = 3V
% V A mA %/W
DVOUT , DVREF = 1%
VIN - VOUT = 5V VIN - VOUT = 25V VIN - VOUT = 35V tp = 30ms TJ = 25C TJ = Over Temp TJ = Over Temp VIN - VOUT = 5V TJ = Over Temp TJ = Over Temp TJ = 25C
6 3 3 3
5.5 0.3
6.5 0.6 10 0.002 55 120 0.2 5 0.01
REG(THERM) Thermal Regulation IPIN Adjust Pin Current Adjust Pin Current Change Temperature Stability
mA mA
%
DIPIN
TS IO VN RA
IO = 0.5A IO = 0.5A
0.5
Minimum Load Current RMS Output Noise
5
VIN - VOUT = 25V
3
5 0.003
10
mA %VO dB
Ripple Rejection Ratio
VIN - VOUT = 3V TJ = Over Temp
3
IO = 3A
60
75
Notes
1. Test Conditions unless otherwise stated: VIN = 1.5 to 35V, or Maximum Input, whichever is less. IO = 10mA to 5A.
2. These specifications are only applicable for power dissipations of 45 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. 7/00
LAB
K Package (TO-3)
40.01 (1.575) Max.
10.41 (0.410) 10.72 (0.422)
SEME
LT1084M
MILITARY VERSION G & IG Packages (TO-257)
4.83 (0.190) 5.46 (0.215) 0.89 (0.035) 1.14 (0.045)
26.67 (1.050) Max.
1 0.4 1 (0.4 1) 1 0.9 2 (0.4 3)
4.47 (0.176) Rad. 2 Pls.
1 3.39 (0.5 27) 1 3.64 (0.5 37)
3.05 (0.120) O 3.30 (0.130)
11.43 (0.450) 6.35 (0.250) 1.09 (0.043) 0.97 (0.038) Dia. 30.40 (1.197) 29.90 (1.177) 12.19 (0.48) 11.18 (0.44)
1.63 (0.064) 1.52 (0.060)
12.70 (0.50) 19.05 (0.75)
22.23 (0.875) Max.
123
0.64 (0.025) 0.89 (0.035)
2.54 0.08 (0.10 0.003)
3.05 0.08 (0.12 0.003)
SMD1 Package
2
11.18 (0.440) 10.67 (0.420) 4.09 (0.161) 3.84 (0.151) 2 Pls
4 .1 4 (0 .1 6 3 ) 3 .8 4 (0 .1 5 1 ) 3 .7 0 (0 .1 4 6 ) 3 .4 1 (0 .1 3 4 ) 0 .8 9 (0 .0 3 5 ) m in . 3 .7 0 (0 .1 4 6 ) 3 .4 1 (0 .1 3 4 ) 3 .6 0 (0 .1 4 2 ) M ax.
1
3
0 .7 6 (0 .0 3 0 ) m in .
1
1 0 .6 9 (0 .4 2 1 ) 1 0 .3 9 (0 .4 0 9 )
2
16.97 (0.668) 16.87 (0.664)
9 .6 9 .3 1 1 .5 1 1 .2
7 (0 8 (0 8 (0 8 (0
.3 8 .3 6 .4 5 .4 4
1)
9) 6) 4)
1 6 .0 2 (0 .6 3 1 ) 1 5 .7 3 (0 .6 1 9 )
1 6.3 8 (0 .64 5) 1 6.8 9 (0 .66 5)
0 .5 0 (0 .0 2 0 ) 0 .2 6 (0 .0 1 0 )
LT1084MK
Pin 1 2 Fixed Adjustable COMMON ADJUST INPUT INPUT Case is OUTPUT Pin 1 2 3
LT1084MSM
Fixed COMMON OUTPUT INPUT Adjustable ADJUST OUTPUT INPUT
LT1084MG
Pin 1 2 3 Fixed Adjustable COMMON ADJUST OUTPUT OUTPUT INPUT INPUT Case is OUTPUT Pin 1 2 3
LT1084MIG
Fixed Adjustable COMMON ADJUST OUTPUT OUTPUT INPUT INPUT Case is ISOLATED
Prelim. 7/00
Semelab plc.
Telephone +44(0)1455 556565. Fax +44(0)1455 552612. E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk

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