Datasheet

5
LTC1628-SYNC
1628syncfa
Internal 5V LDO Line Regulation
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
Load Regulation
LOAD CURRENT (A)
0
NORMALIZED V
OUT
(%)
0.2
0.1
4
1628 G13
0.3
0.4
1
2
3
5
0.0
FCB = 0V
V
IN
= 15V
FIGURE 1
V
ITH
vs V
RUN/SS
V
RUN/SS
(V)
0
0
V
ITH
(V)
0.5
1.0
1.5
2.0
2.5
1
234
1628 G14
56
V
OSENSE
= 0.7V
SENSE Pins Total Source Current
V
SENSE
COMMON MODE VOLTAGE (V)
0
I
SENSE
(µA)
0
1628 G15
–50
100
24
50
100
6
TYPICAL PERFOR A CE CHARACTERISTICS
UW