LTC3727-1 Linear Technology, LTC3727-1 Datasheet - Page 5

• Manufacturer Part Number: LTC3727-1
• Description: 2-Phase Synchronous Step-Down Switching Regulators
• Manufacturer: Linear Technology

TYPICAL PERFOR A CE CHARACTERISTICS
1000
800
600
400
200
150
125
100
125
100
–25
–50
150
75
50
25
0
75
50
25
0
0
Supply Current vs Input Voltage
and Mode (Figure 13)
0
0
Maximum Current Sense Threshold
vs Duty Factor
Current Sense Threshold
vs I
0
TH
20
Voltage
0.5
10
INPUT VOLTAGE (V)
DUTY FACTOR (%)
40
BOTH
CONTROLLERS ON
1.0
SHUTDOWN
V
ITH
20
(V)
60
1.5
W
80
2.0
30
3727 G04
3727 G07
3727 G10
U
100
2.5
–0.2
–0.3
–0.4
–0.1
140
120
160
100
150
135
120
105
0.0
80
60
40
20
60
45
30
15
90
75
0
0
0
EXTV
0
0
Maximum Current Sense Threshold
vs Percent of Nominal Output
Voltage (Foldback)
PERCENT ON NOMINAL OUTPUT VOLTAGE (%)
Load Regulation
V
EXTVCC
CC
10
20
1
= 8.5V
Voltage Drop
LOAD CURRENT (A)
CURRENT (mA)
20
40
2
30
60
3
FCB = 0V
V
FIGURE 1
40
80
IN
4
= 15V
3727 G05
3727 G11
3727 G08
100
50
5
LTC3727/LTC3727-1
125
7.7
7.6
7.5
7.4
7.3
7.2
7.0
150
100
7.1
6.9
6.8
2.5
2.0
1.5
1.0
0.5
75
50
0
0
Internal 7.5V LDO Line Regulation
0
0
Maximum Current Sense Threshold
vs V
V
I
V
V
LOAD
ITH
OSENSE
SENSE(CM)
RUN/SS
5
vs V
= 1mA
1
1
= 0.7V
www.DataSheet4U.com
10
RUN/SS
INPUT VOLTAGE (V)
= 1.6V
2
2
(Soft-Start)
V
V
15
RUN/SS
RUN/SS
3
3
20
(V)
(V)
4
4
25
5
30
5
3727 G06
3727 G09
3727 G12
5
3727f
35
6
6