LTC3728 Linear Technology, LTC3728 Datasheet - Page 5

• Manufacturer Part Number: LTC3728
• Description: 2-Phase Synchronous Step-Down Switching Regulator
• Manufacturer: Linear Technology

TYPICAL PERFOR A CE CHARACTERISTICS
1000
800
600
400
200
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 Regulation
Maximum Current Sense Threshold
vs V
0
Supply Current vs Input Voltage
and Mode (Figure 13)
I
V
LOAD
SENSE(CM)
RUN/SS
5
5
SHUTDOWN
1
= 1mA
10
10
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
= 1.6V
(Soft-Start)
2
BOTH
CONTROLLERS ON
V
15
RUN/SS
15
3
20
20
(V)
4
25
25
W
5
30
30
3728 G07
3728 G04
3728 G10
U
35
35
6
250
200
100
150
75
50
25
64
50
80
76
72
68
60
0
0
0
0
EXTV
Maximum Current Sense Threshold
vs Duty Factor
0
Maximum Current Sense Threshold
vs Sense Common Mode Voltage
CC
20
10
COMMON MODE VOLTAGE (V)
1
Voltage Drop
DUTY FACTOR (%)
CURRENT (mA)
40
20
2
60
30
3
80
40
4
3728 G05
3728 G08
3728 G11
100
50
5
5.05
5.00
4.85
4.75
4.70
4.95
4.90
4.80
–10
–20
–30
80
70
60
50
40
30
20
10
90
80
70
60
50
40
10
30
20
0
0
– 50
0
0
Maximum Current Sense Threshold
vs Percent of Nominal Output
Voltage (Foldback)
PERCENT ON NOMINAL OUTPUT VOLTAGE (%)
Current Sense Threshold
vs I
INTV
Voltage vs Temperature
– 25
TH
CC
0.5
Voltage
EXTV
and EXTV
25
www.DataSheet4U.com
0
TEMPERATURE (°C)
CC
SWITCHOVER THRESHOLD
INTV
1
25
V
ITH
LTC3728
50
CC
CC
(V)
50
VOLTAGE
1.5
Switch
75
75
2
100
3728 G06
3728 G09
3728 G12
3728fb
5
100
125
2.5