Datasheet

5
LTC1628/LTC1628-PG
1628fb
Internal 5V LDO Line Reg
Maximum Current Sense Threshold
vs Duty Factor
Maximum Current Sense Threshold
vs Percent of Nominal Output
Voltage (Foldback)
INPUT VOLTAGE (V)
0
4.8
4.9
5.1
15 25
1628 G07
4.7
4.6
510
20 30 35
4.5
4.4
5.0
INTV
CC
VOLTAGE (V)
I
LOAD
= 1mA
DUTY FACTOR (%)
0
0
V
SENSE
(mV)
25
50
75
20 40 60 80
1628 G08
100
PERCENT ON NOMINAL OUTPUT VOLTAGE (%)
0
V
SENSE
(mV)
40
50
60
100
1628 G09
30
20
0
25
50
75
10
80
70
Maximum Current Sense Threshold
vs V
RUN/SS
(Soft-Start)
V
RUN/SS
(V)
0
0
V
SENSE
(mV)
20
40
60
80
1234
1628 G10
56
V
SENSE(CM)
= 1.6V
Maximum Current Sense Threshold
vs Sense Common Mode Voltage
COMMON MODE VOLTAGE (V)
0
V
SENSE
(mV)
72
76
80
4
1628 G11
68
64
60
1
2
3
5
Current Sense Threshold
vs I
TH
Voltage
V
ITH
(V)
0
V
SENSE
(mV)
30
50
70
90
2
1628 G12
10
–10
20
40
60
80
0
–20
–30
0.5
1
1.5
2.5
TYPICAL PERFOR A CE CHARACTERISTICS
UW
INTV
CC
and EXTV
CC
Switch
Voltage vs Temperature
Supply Current vs Input Voltage
and Mode (Figure 13)
INPUT VOLTAGE (V)
05
0
SUPPLY CURRENT (µA)
400
1000
10
20
25
1628 G04
200
800
600
15
30
35
BOTH
CONTROLLERS ON
STANDBY
SHUTDOWN
EXTV
CC
Voltage Drop
CURRENT (mA)
0
EXTV
CC
VOLTAGE DROP (mV)
150
200
250
40
1628 G05
100
50
0
10
20
30
50
TEMPERATURE (°C)
–50
INTV
CC
AND EXTV
CC
SWITCH VOLTAGE (V)
4.95
5.00
5.05
25 75
1628 G06
4.90
4.85
–25 0
50 100 125
4.80
4.70
4.75
INTV
CC
VOLTAGE
EXTV
CC
SWITCHOVER THRESHOLD