LT1083 LINER [Linear Technology], LT1083 Datasheet - Page 4

• Manufacturer Part Number: LT1083
• Description: 3A, 5A, 7.5A Low Dropout Positive Fixed Regulators
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFORMANCE CHARACTERISTICS
LT1083/84/85 Fixed
ELECTRICAL CHARACTERISTICS
PARAMETER
Ripple Rejection
Temperature Stability
Long Term Stability
RMS Output Noise
(% of V
Thermal Resistance
Junctrion-to-Case
The
temperature range.
Note 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.
Note 2: Line and load regulation are guaranteed up to the maximum power
dissipation (60W for the LT1083, 45W for the LT1084 (K, P), 30W for the
LT1084 (T) and 30W for the LT1085). 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 range.
Note 3: I
curve is defined as the minimum value of current limit as a function of
4
2
1
0
denotes the specifications which apply over the full operating
LT1083 Dropout Voltage
0
OUT
FULL LOAD
1
)
INDICATES GUARANTEED TEST POINT
0°C T
2
T
J
OUTPUT CURRENT (A)
J
is defined in the current limit curves. The I
= –55°C
3
–40°C T
125°C
T
J
4
= 25°C
LT1085-3.3
LT1085-3.6
LT1083/4/5-5
LT1083/4/5-12
T
T
10Hz = f 10kHz
Control Circuitry/Power Transistor (See Applications Information)
LT1083
LT1084
LT1085
CONDITIONS
A
A
T
J
5
= 125 C, 1000 Hrs.
= 25 C,
J
= 150°C
150°C
6
7
LT1083/4/5 FIXED G01
W
8
9
f = 120Hz, C
f = 120Hz, C
V
V
K Package
P Package
K Package
P Package
T Package
K Package
T Package
DD Package
U
IN
IN
10
= 8V (Note 5)
= 15V (Note 5)
OUT
OUT
12
10
0
8
6
4
2
= 25 F Tantalum, V
= 25 F Tantalum, V
0
LT1083 Short-Circuit Current
FULLLOAD
5
INPUT/OUTPUT DIFFERENTIAL (V)
–55°C
GUARANTEED
I
FULL LOAD
10
15
25°C
150°C
IN
IN
input to output voltage. Note that the 60W power dissipation for the
LT1083 (45W for the LT1084 (K, P), 30W for the LT1084 (T), 30W for the
LT1085) is only achievable over a limited range of input to output voltage.
Note 4: Dropout voltage is specified over the full output current range of
the device. Test points and limits are shown on the Dropout Voltage curve.
Note 5: For LT1083 I
T
Note 6: 1.7V (V
Note 7: Dropout voltage 1.7V maximum for LT1084 at – 55 T
Note 8: Full load current is not available at all input-output voltages.
See Notes 2,3,5.
= 6.3V, I
= 6.6V, I
20
J
– 40 C.
25
LT1083/4/5 FIXED G02
OUT
OUT
30
= 3A
= 3A
IN
35
– V
FULL LOAD
OUT
) 25V for LT1084 at – 55 C T
–0.05
–0.15
–0.20
–0.10
is 5A for – 55 C T
0.10
0.05
0
–50
LT1083 Load Regulation
I = 7.5A
–25
MIN
60
60
60
54
0
TEMPERATURE (°C)
25
0.003
0.03
J
TYP
0.5
72
72
68
60
– 40 C and 7.5A for
50
0.75/2.3
0.65/2.3
0.65/2.7
0.6/1.6
0.5/1.6
0.9/3.0
0.7/3.0
0.7/3.0
MAX
75
J
1.0
J
– 40 C.
100
LT1083/4/5 FIXED G03
– 40 C.
UNITS
125
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
dB
dB
dB
dB
%
%
%
150