LT3055_15 Datasheet, PDF (6/26 Pages) Linear Technology – 500mA, Linear Regulator with Precision Current Limit and Diagnostics

LT3055 Series
TYPICAL PERFORMANCE CHARACTERISTICS T_J = 25°C, unless otherwise noted.
Typical Dropout Voltage
600
550
500
T_J = 150°C
450
400
350
T_J = 125°C
300
250
T_J = 25°C
200
150
100
50
0
0 50 100 150 200 250 300 350 400 450 500
OUTPUT CURRENT (mA)
3055 G01
Quiescent Current
130
120
110
100
90
V_IN = V_SHDN = 12V
V_OUT = 5V
80
I_L = 10µA
70
60
50
40
30
20
V_IN = 12V
10
ALL OTHER PINS = 0V
0
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
3055 G04
Output Voltage-LT3055-5
5.10
I_L = 1mA
5.08
5.06
5.04
5.02
5.00
4.98
4.96
4.94
4.92
4.90
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
3055 G07
Guaranteed Dropout Voltage
700
650
= TEST POINTS
600
550
500
T_J = 150°C
450
400
T_J = 25°C
350
300
250
200
150
100
50
0
0 50 100 150 200 250 300 350 400 450 500
OUTPUT CURRENT (mA)
3055 G02
ADJ Pin Voltage
612
610 ^{IL = 1mA}
608
606
604
602
600
598
596
594
592
590
588
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
3055 G05
Quiescent Current
140
130 ^TJ ^{= 25°C}
120 ^{IL = 0}
110
100
90
80
LT3055-5
70
60
LT3055-3.3
50
40
30
20
10
V_SHDN = 0V, R_L = 0
0
0 1 2 3 4 5 6 7 8 9 10 11 12
V_IN (V)
3055 G08
Dropout Voltage
600
550
500
450
400
I_L = 500mA
350
300
I_L = 100mA
250
I_L = 50mA
200
150
100
I_L = 10mA
50
0
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
3055 G03
Output Voltage-LT3055-3.3
3.366
3.355 ^{IL = 1mA}
3.344
3.333
3.322
3.311
3.300
3.289
3.278
3.267
3.256
3.245
3.234
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
3055 G06
GND Pin Current-LT3055-3.3
12
11
10
R_L = 6.6Ω, I_L = 500mA
9
8
7
6
5
R_L = 13.2Ω, I_L = 250mA
4
3
2
R_L = 33Ω, I_L = 100mA
1
R_L = 330Ω, I_L = 10mA
0
0 1 2 3 4 5 6 7 8 9 10 11 12
V_IN (V)
3055 G09
3055fa
6
For more information www.linear.com/LT3055