ltc3728legn-trpbf Linear Technology Corporation, ltc3728legn-trpbf Datasheet - Page 6

• Manufacturer Part Number: ltc3728legn-trpbf
• Description: Dual, 550khz, 2-phase Synchronous Step-down Switching Regulator
• Manufacturer: Linear Technology Corporation

LTC3728
TYPICAL PERFORMANCE CHARACTERISTICS
6
–0.3
–0.4
–0.1
–0.2
0.0
60
20
76
70
80
40
80
78
74
72
0
–50 –25
0
Maximum Current Sense Threshold
vs V
0
Load Regulation
Mazimum Current Sense
Threshold vs Temperature
V
SENSE(CM)
RUN/SS
1
1
0
LOAD CURRENT (A)
TEMPERATURE (°C)
= 1.6V
2
(Soft-Start)
V
2
RUN/SS
25
3
50
(V)
3
4
75
FCB = 0V
V
4
IN
100
5
= 15V
3728 G13
3728 G10
3728 G17
125
5
6
2.5
2.0
1.5
1.0
0.5
80
76
68
64
60
72
0
4
3
2
1
0
0
Maximum Current Sense Threshold
vs Sense Common Mode Voltage
V
0
Dropout Voltage vs Output Current
(Figure 14)
0
V
V
ITH
OSENSE
OUT
0.5
vs V
1
= 5V
COMMON MODE VOLTAGE (V)
1
= 0.7V
1.0
RUN/SS
OUTPUT CURRENT (A)
2
R
1.5
SENSE
V
2
RUN/SS
R
SENSE
2.0
3
= 0.010Ω
(V)
3
2.5
= 0.015Ω
4
3.0
4
5
3.5
3728 G11
3728 G14
3728 G18
4.0
5
6
–100
–10
–20
–30
100
–50
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
90
80
70
60
50
40
10
30
20
50
0
0
0
–50
0
0
Current Sense Threshold vs
I
SENSE Pins Total Source Current
RUN/SS Current vs Temperature
TH
V
Voltage
–25
SENSE
0.5
COMMON MODE VOLTAGE (V)
0
TEMPERATURE (°C)
2
1
25
V
ITH
(V)
50
1.5
4
75
2
100
3728 G25
3728 G12
3728 G15
3728fd
125
2.5
6