ltc1709-7 Linear Technology Corporation, ltc1709-7 Datasheet - Page 6

• Manufacturer Part Number: ltc1709-7
• Description: 2-phase, 5-bit Vid, Current Mode, High Efficiency, Synchronous Step-down Switching Regulator
• Manufacturer: Linear Technology Corporation

LTC1709-7
TYPICAL PERFOR A CE CHARACTERISTICS
50mV/DIV
6
–0.1
–0.2
–0.3
–0.4
0/20A
0.0
76
70
80
78
74
72
V
I
OUT
OUT
–50 –25
0
Load Regulation
Maximum Current Sense
Threshold vs Temperature
Load Step (Figure 12)
V
FCB = 0V
IN
= 15V, V
1
0
TEMPERATURE ( C)
LOAD CURRENT (A)
OUT
2
25
= 1.6V
20 s/DIV
50
3
75
W
FCB = 0V
V
FIGURE 1
4
IN
100
= 15V
17097 G16
17097 G13
U
17097 G19
125
5
20mV/DIV
V
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
OUT(AC)
1A/DIV
1A/DIV
0.2
2.5
2.0
1.5
1.0
0.5
0
0
–50
I
I
L1
L2
V
0
RUN/SS Current vs Temperature
V
ITH
OSENSE
Burst Mode Operation (Figure 12)
V
FCB = OPEN
–25
IN
vs V
1
= 15V, V
= 0.7V
RUN/SS
0
TEMPERATURE ( C)
2
OUT
V
25
RUN/SS
= 1.6V, I
10 s/DIV
3
50
(V)
L
= 200mA
4
75
RMS
100
5
17097 G17
17097 G14
17097 G25
125
6
20mV/DIV
V
V
1V/DIV
2V/DIV
2V/DIV
–100
RUN/SS
OUT(AC)
1A/DIV
1A/DIV
–50
100
V
V
50
OUT
ITH
0
I
I
L1
L2
0
SENSE Pins Total Source Current
Constant Frequency Mode
(Figure 12)
Soft-Start Up (Figure 12)
V
FCB = INTV
IN
V
SENSE
= 15V, V
COMMON MODE VOLTAGE (V)
CC
OUT
2
= 1.6V, I
100ms/DIV
2 s/DIV
L
= 400mA
4
RMS
17097 G15
17097 G18
17097 G26
6