LT1528 Linear Technology, LT1528 Datasheet - Page 4

• Manufacturer Part Number: LT1528
• Description: 3A Low Dropout Regulator for Microprocessor Applications
• Manufacturer: Linear Technology

LT1528
TYPICAL PERFORMANCE CHARACTERISTICS
4
2000
1750
1500
1250
1000
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
100
750
500
250
90
80
70
60
50
40
30
20
10
0
0
0
0
Guaranteed Dropout Voltage
Quiescent Current
0
Ground Pin Current
0
1
1
= TEST POINTS
0.5
2
2
T
OUTPUT CURRENT (A)
J
R
I
3
3
INPUT VOLTAGE (V)
1.0
INPUT VOLTAGE (V)
LOAD
L
V
125 C
= 2.2
SHDN
4
4
= 1.5A*
V
SHDN
1.5
= OPEN (HIGH)
5
5
T
= 0V
T
V
*FOR V
J
6
6
J
OUT
2.0
= 25 C
R
I
LOAD
R
I
25 C
L
LOAD
7
7
= V
L
= 4.7
W
R
= 1.1
OUT
LOAD
I
SENSE
= 700mA*
LOAD
LT1528 • TPC01
8
= 3A*
8
2.5
LT1528 • TPC04
LT1528 • TPC07
= 3.3V
=
= 0
9
9
U
3.0
10
10
3.400
3.375
3.350
3.325
3.300
3.275
3.250
3.225
3.200
100
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
90
80
70
60
50
40
30
20
10
0
0
–50
–50
0
Dropout Voltage
Sense Pin Voltage
Ground Pin Current
I
LOAD
V
DEVICE IS OPERATING
IN DROPOUT
I
LOAD
IN
–25
–25
0.5
= 3.3V
= 700mA
= 1mA
OUTPUT CURRENT (A)
0
0
TEMPERATURE ( C)
TEMPERATURE ( C)
1.0
I
LOAD
I
T
25
25
LOAD
J
1.5
= 25 C
= 3A
= 1.5A
50
50
I
LOAD
2.0
I
T
LOAD
J
75
75
= 300mA
= 125 C
T
J
= –50 C
= 10mA
LT1528 • TPC08
2.5
LT1528 • TPC02
LT1528 • TPC05
100
100
125
125
3.0
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
7
6
5
4
3
2
0
0
1
–50
–50
Quiescent Current
Ground Pin Current
Shutdown Pin Threshold
(On-to-Off)
0
V
R
I
LOAD
1
IN
–25
L
–25
=
= 4.3V
2
= 1mA
V
SHDN
0
0
TEMPERATURE ( C)
V
R
3
INPUT VOLTAGE (V)
TEMPERATURE ( C)
SHDN
L
R
I
R
I
= 330 : I
LOAD
LOAD
= OPEN
L
L
4
25
25
= 33
= 11
= 0V
= 100mA*
= 300mA*
5
50
R
I
50
T
V
*FOR V
LOAD
LOAD
L
J
6
OUT
= 6.6
= 25 C
= 10mA*
= V
= 500mA*
75
75
7
OUT
SENSE
8
LT1528 • TPC09
LT1528 • TPC03
= 3.3V
LT1528 • TPC06
100
100
9
125
125
10