LTC1921 Linear Technology, LTC1921 Datasheet - Page 3

• Manufacturer Part Number: LTC1921
• Description: Dual .48V Supply and Fuse Monitor
• Manufacturer: Linear Technology

TYPICAL PERFOR A CE CHARACTERISTICS
–42.5
–42.6
–42.7
–42.8
–42.9
–43.0
–43.1
–43.2
–43.3
–43.4
–43.5
400
350
300
250
200
150
100
2.7
2.5
2.3
2.1
1.9
1.7
1.5
50
0
–50
–50
0
Supply Current vs Supply Voltage
Fuse Window Positive Threshold
vs Temperature
Undervoltage Recovery Threshold
vs Temperature
V
A
10
= V
–30
–30
B
20
= V
–10
–10
FUSEA
SUPPLY VOLTAGE (V)
30
TEMPERATURE ( C)
TEMPERATURE ( C)
40
10
= V
10
FUSEB
50
30
30
60
70
50
50
W
80
70
70
90
1921 G08
1921 G01
1921 G05
U
100
90
90
–68.0
–68.5
–69.0
–69.5
–70.0
–70.5
–71.0
–71.5
–72.0
–2.0
–2.2
–2.4
–2.6
–2.8
–3.0
–3.2
120
160
140
100
180
80
60
40
20
0
–50
–50
–50
Supply Current vs Temperature
Fuse Window Negative Threshold
vs Temperature
Overvoltage Threshold
vs Temperature
V
V
V
V
A
B
FUSEA
FUSEB
= –48V
= –48V
–30
–30
–30
= –48V
= –48V
–10
–10
–10
TEMPERATURE ( C)
TEMPERATURE ( C)
TEMPERATURE ( C)
10
10
10
I
I
A
A
+ I
, I
B
B
30
30
30
50
50
50
70
70
70
1921 G02
1921 G09
1921 G06
90
90
90
–37.5
–37.7
–37.9
–38.1
–38.3
–38.5
–38.7
–38.9
–39.1
–39.3
–39.5
1.50
1.45
1.40
1.35
1.30
1.25
1.20
1.15
1.10
1.05
1.00
30
25
10
20
15
0
5
–50
–50
–50
Output R
Undervoltage Threshold
vs Temperature
Overvoltage Hysteresis
vs Temperature
OUT A (OUT F = 0V)
V
V
I = –10mA
A
B
–30
–30
= –35V
= –35V
–30
DS(ON)
–10
–10
–10
TEMPERATURE ( C)
TEMPERATURE ( C)
TEMPERATURE ( C)
OUT F, OUT B (OUT A = 0V)
10
10
10
vs Temperature
LTC1921
30
30
30
50
50
50
70
70
70
1921 G03
1921 G07
1921 G04
3
1921i
90
90
90