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LM1085-220M-05 LM1085-05-220M LM1085-12-220M
MILITARY VERSION
TO-220 Isolated Metal Package
10.41 10.67 4.70 5.00 0.70 0.90 3.56 Dia. 3.81 10.41 10.92
LOW DROPOUT 3 AMP POSITIVE VOLTAGE REGULATOR
FEATURES * * * * * * * Low Dropout Performance Fixed or Adjustable Voltages Fixed Output Voltages of 5V & 12V Output Current 3A Line Regulation 0.015% / V Typical. Load Regulation 0.1% Typical. Military Temperature Range (-55 to +150C)
16.38 16.89
13.39 13.64
123
12.70 19.05
0.89 1.14 2.54 BSC 2.65 2.75
BLOCK DIAGRAM
VIN
Pinouts
Pin 1 2 3 Fixed Adjustable GROUND ADJUST OUTPUT OUTPUT INPUT INPUT Case is ISOLATED
THERMAL LIMIT
Ordering Information
LM1085-220M LM1085-05-220M LM1085-12-220M Positive Adjustable Regulator Fixed +5V Regulator Fixed +12V Regulator
VADJ VOUT
ABSOLUTE MAXIMUM RATINGS (Tcase = 25C unless otherwise stated)
VIN VI-O PD VIN Input Voltage Input-Output Differential Voltage Power Dissipation Operating Input Voltage Adjustable 5 Volt 12 Volt Control Power 5V, 12V Adjustable 30V 35V Internally limited 25V 20V 25V -55 to 150C -55 to 200C -65 to 150C 300C
TJ TSTG TLEAD
Operating Junction Temperature Range Storage Temperature Range Lead Temperature (for 10 sec.)
* Although the devices' maximum operating voltage is limited (20V for the 5V device, and 25V for the 12V and adjustable devices) the devices are guaranteed to withstand transient input voltages up to 30V. For input voltages greater than the maximum operating input voltage, some degradation of specifications will occur. For 5V and 12V devices operating at input-output voltage differentials >15V, a minimum external load of 5mA is required to maintain regulation.
Semelab plc.
Telephone +44(0)1455 556565. Fax +44(0)1455 552612. Website: http://www.semelab.co.uk E-mail: sales@semelab.co.uk
Prelim. 10/95
LM1085-220M-05 LM1085-05-220M LM1085-12-220M
MILITARY VERSION DESCRIPTION
The LM1085 is designed to provide 3A with higher efficiency than currently available devices. All internal circuitry is designed to operate down to 1V input to output differential and the dropout voltage is fully specified as a function of load current. Dropout is guaranteed at a maximum of 1.5V at maximum output current, decreasing at lower load currents. On-chip trimming adjusts the reference output voltage to 1%. Current limit is also trimmed, minimising the stress on both the regulator and power source circuitry under overload conditions. The LM1085 is pin compatible with older 3 terminal adjustable regulators. A 10m F output capacitor is required on these new devices; however, this is usually included in most regulator designs. Unlike PNP regulators, where up to 10% of the output current is wasted as quiescent current, the LM1085 quiescent current flows into the load, increasing efficiency.
ELECTRICAL CHARACTERISTICS
Parameter
(TJ = 25C unless otherwise stated)
Min.
IO = 0 to 3A IO = 0 to 3A IO = 10mA to 3A 4.90
Output Voltage Test Conditions
5 VIN = 6.5 to 20V TJ = -55 to 150C VIN = 13.5V to 25V TJ = -55 to 150C VIN - VOUT = 1.5 to 15V TJ = -55 to 150C VIN = 6.5 to 20V IO = 0 VIN = 13.5 to 25V IO = 0 VIN - VOUT = 1.5 to 15V ILOAD = 10mA VIN = 8V IO = 0 to 3A VIN = 15V IO = 0 to 3A VIN - VOUT = 3V IO = 10mA to 3A TJ = -55 to 150C TJ = -55 to 150C TJ = -55 to 150C TJ = -55 to 150C TJ = -55 to 150C TJ = -55 to 150C TJ = -55 to 150C TJ = -55 to 150C TJ = -55 to 150C
Typ. Max.
5 5.10
Unit
VO
Output Voltage 12
11.76
12
12.24
V
VREF
Reference Voltage
ADJ.
1.225
1.25 0.5 1 1 2 0.015 0.035 5 10 12 24 0.1 0.2 1.3
1.270 10 10 25 25 0.2 0.2 20 35 36 72 0.3 0.4 1.5 % mV % mV
5
REG(LINE)
Line Regulation
12
ADJ.
5
REG(LOAD)
Load Regulation
12
See notes 1,2
ADJ.
5
DVOUT = 50mV
IOUT = 3A
VD
Dropout Voltage
12
DVOUT = 120mV
IOUT = 3A
1.3
1.5
V
See note 3
ADJ.
DVREF = 1%
IOUT = 3A
1.3
1.5
Semelab plc.
Telephone +44(0)1455 556565. Fax +44(0)1455 552612. Website: http://www.semelab.co.uk E-mail: sales@semelab.co.uk
Prelim. 10/95
LM1085-220M-05 LM1085-05-220M LM1085-12-220M
MILITARY VERSION ELECTRICAL CHARACTERISTICS
Parameter
ICL IQ Current Limit Quiescent Current Minimum Load Current REG(THERM)
4
(TJ = -55 to +150C unless otherwise stated)
Min.
TJ = -55 to 150C TJ = -55 to 150C TJ = -55 to 150C TJ = -55 to 150C TJ = -55 to 150C TA = 25C VIN = 8V VIN = 15V VIN - VOUT = 3V CADJ = 25mF TJ = -55 to 150C
60 54 60 3.2 0.2
Output Voltage Test Conditions VIN - VOUT = 5V
VIN - VOUT = 25V
5 12 ADJ.
Typ. Max.
4 0.5 5 5 5 0.004 68 60 75 55 120 0.2 0.5 5 10 10 10 0.02
Unit
A
20V VIN 25V
VIN VIN - VOUT = 25V TP = 30ms TJ = -55 to 150C COUT = 25mF Tantalum f = 120Hz IO = 3A
mA
Thermal Regulation
5 12 ADJ.
%/W
RA
Ripple Rejection
dB
IPIN
Adjust Pin Current Adjust Pin Current Change Temperature Stability Long Term Stability RMS Output Noise Thermal Resistance Junction - Case
ADJ.
mA mA
%
DIPIN
TS VN RqJC
ADJ.
VIN - VOUT = 1.5 to 15V IO = 10mA to 3A TJ = -55 to 150C TA = 125C f = 10Hz to 10kHz T = 1000 Hrs TA = 25C Control Circuitry Power Transistor TJ = -55 to 150C
0.3 0.003 TBA TBA
1
% % C/W
Notes:
1. See thermal regulation specifications for changes in output voltage due to heating effects. Load and line regulation are measured at a constant junction temperature by low duty cycle pulse testing. Load regulation is measured at the output lead 1/8" from the package. 2. Line and load regulation are guaranteed up to the maximum power dissipation of 30W. Power dissipation is determined by the input - output differential and the output current. Guaranteed maximum power dissipation will not be available over the full input - output voltage range. 3. Dropout voltage is specified over the full output current range of the device.
Semelab plc.
Telephone +44(0)1455 556565. Fax +44(0)1455 552612. Website: http://www.semelab.co.uk E-mail: sales@semelab.co.uk
Prelim. 10/95

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