LT1085CT-33 Datasheet, PDF (6/12 Pages) Linear Technology – 3A, 5A, 7.5A Low Dropout Positive Fixed Regulators

LT1083/LT1084/LT1085 Fixed
TYPICAL PERFOR A CE CHARACTERISTICS
LT1083/4/5-5 Ripple Rejection
80
V_RIPPLE ≤ 3V_P-P
V_RIPPLE
70
≤ 0.5V_P-P
60
(V_IN – V_OUT) ≥ 3V
50
(V_IN – V_OUT) ≥ V_DROPOUT
40
30
20
10
I_OUT = I_FULLLOAD
0
10
100
1k
10k
FREQUENCY (Hz)
100k
1083/4/5 FIXED G10
LT1083/4/5-12 Ripple Rejection
80
V_RIPPLE ≤ 3V_P-P
V_RIPPLE
70
≤ 0.5V_P-P
60
50
(V_IN – V_OUT) ≥ 3V
40
(V_IN – V_OUT) ≥ V_DROPOUT
30
20
10
I_OUT = I_FULLLOAD
0
10
100
1k
10k
FREQUENCY (Hz)
100k
1083/4/5 FIXED G13
LT1083/4/5-5 Ripple Rejection
vs Current
100
90
80
70
60 ^fR ^{= 20kHz}
V_RIPPLE ≤ 0.5V_P-P
50
f_R = 120Hz
V_RIPPLE ≤ 3V_P-P
40
30
20
10
0
0
0.2 0.4
0.6 0.8
1.0
OUTPUT CURRENT (0 TO I_FULLLOAD)
1083/4/5 FIXED G11
LT1083/4/5-12 Ripple Rejection
vs Current
100
90
80
70
f_R = 120Hz
V_RIPPLE ≤ 3V_P-P
60
50
f_R = 20kHz
V_RIPPLE ≤ 0.5V_P-P
40
30
20
10
0
0
0.2 0.4
0.6 0.8
1.0
OUTPUT CURRENT (0 TO I_FULLLOAD)
1083/4/5 FIXED G14
Temperature Stability
2.0
1.0
0
–1.0
–2.0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
LT1183/4/5 FIXED G12
LT1083 Maximum Power
Dissipation*
100
90
80
70
LT1083MK
60
50
40
30
LT1083CP
20
10
LT1083CK
0
50 60 70 80 90 100 110 120 130 140 150
CASE TEMPERATURE (°C)
* AS LIMITED BY MAXIMUM JUNCTION TEMPERATURE
LT1083/4/5 FIXED G15
6
LT1084 Maximum Power
Dissipation*
60
50
LT1084MK
40
30
LT1084CT
20
LT1084CP
10
LT1084CK
0
50 60 70 80 90 100 110 120 130 140 150
CASE TEMPERATURE (°C)
* AS LIMITED BY MAXIMUM JUNCTION TEMPERATURE
LT1083/4/5 FIXED G16
LT1085 Maximum Power
Dissipation*
50
40
LT1085MK
30
20
LT1085CT
10
LT1085CK
0
50 60 70 80 90 100 110 120 130 140 150
CASE TEMPERATURE (°C)
* AS LIMITED BY MAXIMUM JUNCTION TEMPERATURE
LT1083/4/5 FIXED G17
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