ltc3728legn-1-tr Linear Technology Corporation, ltc3728legn-1-tr Datasheet - Page 6

• Manufacturer Part Number: ltc3728legn-1-tr
• Description: Dual, 550khz, 2-phase Synchronous Regulator
• Manufacturer: Linear Technology Corporation

LTC3728L-1
TYPICAL PERFORMANCE CHARACTERISTICS
6
V
5V/DIV
5V/DIV
2A/DIV
RUN/SS
V
–0.1
–0.2
–0.3
–0.4
OUT
0.0
76
70
80
78
74
72
I
L
–50 –25
0
Load Regulation
Maximum Current Sense
Threshold vs Temperature
Soft-Start Up (Figure 13)
V
V
IN
OUT
= 15V
= 5V
1
0
LOAD CURRENT (A)
TEMPERATURE (°C)
2
25
5ms/DIV
50
3
75
FCB = 0V
V
FIGURE 13
IN
4
100
= 15V
3728L1 G13
3728L1 G17
3728L1 G19
125
5
200mV/DIV
2A/DIV
V
OUT
2.5
2.0
1.5
1.0
0.5
I
4
3
2
1
0
0
L
V
Dropout Voltage vs Output Current
(Figure 14)
0
Load Step (Figure 13)
0
V
V
V
LOAD STEP = 0A TO 3A
Burst Mode OPERATION
V
V
IN
OUT
PLLFLTR
ITH
OSENSE
OUT
= 15V
0.5
= 5V
vs V
= 5V
1
= 50V
= 0.7V
1.0
RUN/SS
OUTPUT CURRENT (A)
2
R
1.5
SENSE
V
RUN/SS
20μs/DIV
R
SENSE
2.0
3
= 0.010Ω
(V)
2.5
= 0.015Ω
4
3.0
5
3.5
3728L1 G14
3728L1 G18
3728L1 G20
4.0
6
200mV/DIV
2A/DIV
–100
V
100
–50
1.0
0.8
0.4
OUT
1.8
1.6
1.4
1.2
0.6
0.2
50
I
0
0
L
–50
0
SENSE Pins Total Source Current
RUN/SS Current vs Temperature
Load Step (Figure 13)
V
V
V
LOAD STEP = 0A TO 3A
CONTINUOUS MODE
IN
OUT
PLLFLTR
= 15V
V
–25
SENSE
= 5V
= 50V
COMMON MODE VOLTAGE (V)
0
TEMPERATURE (°C)
2
25
20μs/DIV
50
4
75
100
3728L1 G25
3728L1 G15
3728L1 G21
3728l1fc
125
6