LT1956 LINER [Linear Technology], LT1956 Datasheet - Page 5

• Manufacturer Part Number: LT1956
• Description: High Voltage, 1.5A, 500kHz Step-Down Switching Regulators
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFOR A CE CHARACTERISTICS
575
550
525
500
475
450
425
0.9
2.1
1.9
1.7
1.5
1.3
1.1
0.7
–50
–50
Switching Frequency
V
C
Pin Shutdown Threshold
–25
–25
JUNCTION TEMPERATURE ( C)
JUNCTION TEMPERATURE ( C)
0
0
25
25
50
50
75
75
W
100
100
1956 G13
1956 G10
U
125
125
450
400
350
300
250
200
150
100
7.5
7.0
6.5
6.0
5.5
5.0
50
0
0
Minimum Input Voltage with 5V
Output
0
Switch Voltage Drop
V
L = 18 H
OUT
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
= 5V
VOLTAGE TO START
SWITCH CURRENT (A)
MINIMUM INPUT
LOAD CURRENT (A)
0.5
VOLTAGE TO RUN
MINIMUM INPUT
T
J
= 25 C
T
T
1
J
J
= –40 C
= 125 C
1956 G11
1766 G14
1.5
600
500
400
300
200
100
45
40
35
30
25
20
15
10
0
5
0
–50
0
BOOST Pin Current
Switch Minimum ON Time
vs Temperature
LT1956/LT1956-5
–25
JUNCTION TEMPERATURE ( C)
SWITCH CURRENT (A)
0
0.5
25
50
1
75
100
1956 G15
1956 G12
5
1956f
125
1.5