Datasheet

5
LT1528
1528fa
SHDN Pin Current
Current Limit
Reverse Output Current
SHDN Pin Input Current
TEMPERATURE (°C)
–50
SHDN PIN THRESHOLD (V)
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
50
75
LT1528 • TPC10
–25
25
100
125
I
LOAD
= 3A
I
LOAD
= 1mA
TEMPERATURE (°C)
–50
SHDN PIN CURRENT (µA)
100
90
80
70
60
50
40
30
20
10
0
0
50
75
LT1528 • TPC11
–25
25
100
125
V
SHDN
= 0V
SHDN PIN VOLTAGE (V)
0
0
SHDN PIN INPUT CURRENT (mA)
5
15
20
25
2
4
59
LT1528 • TPC12
10
13
6
7
8
SENSE Pin Current
TEMPERATURE (°C)
–50
SENSE PIN CURRENT (µA)
25
LT1528 • TPC13
–25 0 50
200
175
150
125
100
75
50
25
0
75 100 125
CURRENT FLOWS INTO SENSE PIN
TEMPERATURE (°C)
–50
OUTPUT CURRENT (µA)
300
250
200
150
100
50
0
25 75
LT1528 • TPC14
–25 0
50 100 125
V
IN
= 0V
V
OUT
= V
SENSE
INPUT VOLTAGE (V)
0
SHORT-CIRCUIT CURRENT (A)
6
5
4
3
2
1
0
35
LT1528 • TPC15
12
467
V
OUT
= 0V
Reverse Output CurrentCurrent Limit Ripple Rejection
TEMPERATURE (°C)
–50
SHORT-CIRCUIT CURRENT (A)
6
5
4
3
2
1
0
25 75
LT1528 • TPC16
–25 0
50 100 125
V
IN
= 7V
V
OUT
= 0V
OUTPUT VOLTAGE (V)
0
OUTPUT CURRENT (µA)
1000
900
800
700
600
500
400
300
200
100
0
8
LT1528 • TPC17
213579
4
6
10
T
J
= 25°C, V
IN
= 0V
V
OUT
=V
SENSE
CURRENT FLOWS
INTO DEVICE
TEMPERATURE (°C)
–50
64
66
70
25 75
LT1528 • TPC18
62
60
–25 0
50 100 125
58
56
68
RIPPLE REJECITON (dB)
V
IN(AVG)
= 4.3V
V
RIPPLE
= 0.5V
P-P
AT f = 120Hz
I
L
= 1.5A
SHDN Pin Threshold
(Off-to-On)
TYPICAL PERFOR A CE CHARACTERISTICS
UW