Datasheet

4
LTC1698
1698f
TYPICAL PERFOR A CE CHARACTERISTICS
UW
V
FB
vs Temperature
TEMPERATURE (°C)
–50
V
FB
(V)
1.236
1.242
1.248
25 75 150
1698 G01
1.230
1.224
1.218
–25 0
50
100 125
V
DD
= 8V
V
DD
(V)
5
1.218
V
FB
(V)
1.224
1.236
1.242
1.248
7
9
10 14
1698 G02
1.230
68
11
12
13
T
A
= 25°C
V
MARGIN
(V)
0
V
FB
(V)
∆V
FB
(%)
1.245
1.270
1.295
2.64
1698 G03
1.221
1.196
1.233
1.258
1.282
1.208
1.184
1.171
1
3
5
–1
–3
0
2
4
–2
–4
–5
0.660.33
1.320.99
1.98 2.31 2.97
1.65
3.3
V
DD
= 8V
T
A
= 25°C
V
FB
vs V
DD
V
FB
vs V
MARGIN
I
SNS
Threshold vs Temperature I
SNS
Threshold vs V
DD
Current Limit Amplifier g
m
vs Temperature
TEMPERATURE (°C)
–50
–27.5
I
SNS
THRESHOLD (mV)
–27.0
–26.0
–25.5
–25.0
–22.5
–24.0
0
50
75
1698 G04
–26.5
–23.5
–23.0
–24.5
–25 25
100
125
150
V
DD
= 8V
V
DD
(V)
5
–27.5
I
SNS
THRESHOLD (mV)
–27.0
–26.0
–25.5
–25.0
–22.5
–24.0
87
10
11
1698 G05
–26.5
–23.5
–23.0
–24.5
69
12
13
14
T
A
= 25°C
TEMPERATURE (°C)
–50
g
mILIM
(millimho)
3.8
4.2
4.6
100 125
1698 G06
3.4
3.0
–25 250 50 75 150
2.6
2.2
5.0
V
DD
= 8V
OVPIN Threshold vs Temperature OVPIN Threshold vs V
DD
Power Good Threshold
vs Temperature
TEMPERATURE (°C)
–50
OVPIN THRESHOLD (V)
1.24
1.26
1.28
25 75 150
1698 G07
1.22
1.20
1.18
–25 0
50
100 125
V
DD
= 8V
V
DD
(V)
5
1.18
OVPIN THRESHOLD (V)
1.20
1.24
1.26
1.28
7
9
10 14
1698 G08
1.22
68
11
12
13
T
A
= 25°C
TEMPERATURE (°C)
–50
POWER GOOD THRESHOLD (V)
∆V
FB
(%)
1.166
1.181
1.196
25 75 150
1698 G09
1.152
1.137
1.122
–5.4
–4.2
–3.0
–6.6
–7.8
–9.0
–25 0
50
100 125
V
DD
= 8V