Seme LAB LT1085220M05 Low dropout 3 amp positive voltage regulator Datasheet

LT1085–220M–05
LT1085–05–220M
LT1085–12–220M
MILITARY VERSION
LOW DROPOUT
3 AMP POSITIVE
VOLTAGE REGULATOR
TO–220 Isolated Metal Package
4.70
5.00
0.70
0.90
FEATURES
3.56
Dia.
3.81
10.41
10.92
13.39
13.64
16.38
16.89
10.41
10.67
12.70
19.05
1 2 3
0.89
1.14
2.54
BSC
2.65
2.75
•
•
•
•
•
•
•
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 +150°C)
BLOCK DIAGRAM
VIN
Pinouts
Pin
1
2
3
Fixed
Adjustable
GROUND
ADJUST
OUTPUT
OUTPUT
INPUT
INPUT
Case is ISOLATED
THERMAL
LIMIT
Ordering Information
LT1085–220M
LT1085–05–220M
LT1085–12–220M
Positive Adjustable Regulator
Fixed +5V Regulator
Fixed +12V Regulator
VADJ
VOUT
ABSOLUTE MAXIMUM RATINGS (Tcase = 25°C unless otherwise stated)
VIN
Input Voltage
5V, 12V
30V
VI-O
Input–Output Differential Voltage
Adjustable
35V
PD
Power Dissipation
VIN
Operating Input Voltage
TJ
Operating Junction Temperature Range
TSTG
Storage Temperature Range
TLEAD
Lead Temperature (for 10 sec.)
Internally limited
Adjustable
5 Volt
12 Volt
25V
20V
25V
Control
Power
–55 to 150°C
–55 to 200°C
–65 to 150°C
300°C
* 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.
E-mail: [email protected]
Website: http://www.semelab.co.uk
Prelim. 10/95
LT1085–220M–05
LT1085–05–220M
LT1085–12–220M
MILITARY VERSION
DESCRIPTION
The LT1085 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 LT1085 is pin compatible with older 3 terminal adjustable regulators. A 10mF 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 LT1085 quiescent
current flows into the load, increasing efficiency.
ELECTRICAL CHARACTERISTICS
Parameter
Output
Voltage Test Conditions
5
VO
Output Voltage
12
VREF
Reference Voltage
ADJ.
5
REG(LINE)
Line Regulation
12
ADJ.
5
REG(LOAD)
Load Regulation
See notes 1,2
12
ADJ.
5
VD
Dropout Voltage
See note 3
Semelab plc.
(TJ = 25°C unless otherwise stated)
12
ADJ.
VIN = 6.5 to 20V
Min.
IO = 0 to 3A
TJ = –55 to 150°C
VIN = 13.5V to 25V
IO = 0 to 3A
TJ = –55 to 150°C
VIN – VOUT = 1.5 to 15V
IO = 10mA to 3A
TJ = –55 to 150°C
VIN = 6.5 to 20V
IO = 0
TJ = –55 to 150°C
VIN = 13.5 to 25V
IO = 0
TJ = –55 to 150°C
VIN – VOUT = 1.5 to 15V
ILOAD = 10mA
TJ = –55 to 150°C
VIN = 8V
IO = 0 to 3A
TJ = –55 to 150°C
VIN = 15V
IO = 0 to 3A
TJ = –55 to 150°C
VIN – VOUT = 3V
IO = 10mA to 3A
TJ = –55 to 150°C
DVOUT = 50mV
IOUT = 3A
TJ = –55 to 150°C
DVOUT = 120mV
IOUT = 3A
TJ = –55 to 150°C
DVREF = 1%
IOUT = 3A
TJ = –55 to 150°C
Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail: [email protected]
Website: http://www.semelab.co.uk
Typ. Max.
4.90
5
5.10
11.76
12
12.24
1.225
1.25
1.270
0.5
10
1
10
1
25
2
25
0.015
0.2
0.035
0.2
5
20
10
35
12
36
24
72
0.1
0.3
0.2
0.4
1.3
1.5
1.3
1.5
1.3
1.5
Unit
V
mV
%
mV
%
V
Prelim. 10/95
LT1085–220M–05
LT1085–05–220M
LT1085–12–220M
MILITARY VERSION
ELECTRICAL CHARACTERISTICS
Parameter
ICL
Current Limit
IQ
Quiescent Current
Minimum Load Current
REG(THERM)
RA
Output
Voltage Test Conditions
VIN – VOUT = 5V
TJ = –55 to 150°C
3.2
4
VIN – VOUT = 25V
TJ = –55 to 150°C
0.2
0.5
£ 20V
VIN £ 25V
TJ = –55 to 150°C
5
10
TJ = –55 to 150°C
5
10
VIN – VOUT = 25V
TJ = –55 to 150°C
5
10
TP = 30ms
TA = 25°C
0.004
0.02
5
TJ = –55 to 150°C
VIN = 8V
60
68
12
COUT = 25mF Tantalum
VIN = 15V
54
60
f = 120Hz
VIN – VOUT = 3V
IO = 3A
CADJ = 25mF
60
75
5
12
4
ADJ.
Thermal Regulation
Ripple Rejection
(TJ = –55 to +150°C unless otherwise stated)
ADJ.
VIN
Min.
Typ. Max.
A
Adjust Pin Current
ADJ.
DIPIN
Adjust Pin Current Change
ADJ.
TS
Temperature Stability
TJ = –55 to 150°C
Long Term Stability
TA = 125°C
T = 1000 Hrs
VN
RMS Output Noise
f = 10Hz to 10kHz
TA = 25°C
0.003
RqJC
Thermal Resistance
Control Circuitry
TBA
Junction – Case
Power Transistor
TBA
TJ = –55 to 150°C
VIN – VOUT = 1.5 to 15V
IO = 10mA to 3A
TJ = –55 to 150°C
120
0.2
5
%/W
mA
mA
%
0.5
0.3
mA
dB
55
IPIN
Unit
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.
E-mail: [email protected]
Website: http://www.semelab.co.uk
Prelim. 10/95
Similar pages