LTC1628 LINER [Linear Technology], LTC1628 Datasheet - Page 5

• Manufacturer Part Number: LTC1628
• Description: High Efficiency, 2-Phase Synchronous Step-Down Switching Regulators
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFOR A CE CHARACTERISTICS
–0.2
–0.3
–0.4
–0.1
5.1
5.0
4.9
4.8
4.7
4.6
4.5
4.4
60
20
80
40
0.0
0
0
Internal 5V LDO Line Reg
Maximum Current Sense Threshold
vs V
0
0
Load Regulation
I
V
LOAD
SENSE(CM)
RUN/SS
5
1
= 1mA
1
10
INPUT VOLTAGE (V)
= 1.6V
LOAD CURRENT (A)
(Soft-Start)
2
V
15
RUN/SS
2
3
20
(V)
3
4
25
W
FCB = 0V
V
FIGURE 1
IN
4
5
30
= 15V
1628 G07
1628 G10
1628 G13
U
35
6
5
2.5
2.0
1.5
1.0
0.5
75
50
25
64
80
76
72
68
60
0
0
0
Maximum Current Sense Threshold
vs Duty Factor
0
Maximum Current Sense Threshold
vs Sense Common Mode Voltage
V
0
V
ITH
OSENSE
vs V
1
20
COMMON MODE VOLTAGE (V)
1
= 0.7V
RUN/SS
DUTY FACTOR (%)
2
40
V
2
RUN/SS
3
(V)
60
3
4
80
4
5
1628 G08
1628 G11
1628 G14
LTC1628/LTC1628-PG
100
5
6
–100
–10
–20
–50
–30
100
50
80
70
60
50
40
30
20
10
90
80
70
60
50
40
10
30
20
0
0
0
0
0
0
Maximum Current Sense Threshold
vs Percent of Nominal Output
Voltage (Foldback)
PERCENT ON NOMINAL OUTPUT VOLTAGE (%)
Current Sense Threshold
vs I
SENSE Pins Total Source Current
V
TH
SENSE
0.5
Voltage
25
COMMON MODE VOLTAGE (V)
2
1
V
ITH
50
(V)
1.5
4
75
2
1628 G09
1628 G15
1628 G12
5
100
2.5
6