5
LTC1735-1
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Maximum Current Sense Threshold
vs Normalized Output Voltage
(Foldback)
Maximum Current Sense Threshold
vs V
RUN/SS
Maximum Current Sense Threshold
vs Sense Common Mode Voltage
NORMALIZED OUTPUT VOLTAGE (%)
0
MAXIMUM CURRENT SENSE THRESHOLD (mV)
40
50
60
100
1735-1 G10
30
20
0
25
50
75
10
80
70
V
RUN/SS
(V)
0
0
MAXIMUM CURRENT SENSE THRESHOLD (mV)
20
40
60
80
1234
1735-1 G11
56
V
SENSE(CM)
= 1.6V
COMMON MODE VOLTAGE (V)
0
MAXIMUM CURRENT SENSE THRESHOLD (mV)
72
76
80
4
1735-1 G12
68
64
60
1
2
3
5
Maximum Current Sense Voltage
vs I
TH
Voltage
V
ITH
(V)
0
MAXIMUM CURRENT SENSE VOLTAGE (V)
30
50
70
90
2
1735-1 G13
10
–10
20
40
60
80
0
–20
–30
0.5
1
1.5
2.5
Output Current vs Duty Cycle
DUTY CYCLE (%)
0
0
AVERAGE OUTPUT CURRENT I
OUT
/I
MAX
(%)
20
40
60
80
100
20
40 60 80
1735-1 G14
100
f
SYNC
= f
O
I
OUT
/I
MAX
(SYNCHRONIZED)
I
OUT
/I
MAX
(FREE RUN)
V
ITH
vs V
RUN/SS
V
RUN/SS
(V)
0
0
V
ITH
(V)
0.5
1.0
1.5
2.0
2.5
1
234
1735-1 G15
56
V
OSENSE
= 0.7V
SENSE Pins Total Source Current
V
SENSE
COMMON MODE VOLTAGE (V)
0
I
SENSE
(µA)
0
1735-1 G16
–50
–100
24
50
100
6
I
TH
Voltage vs Load Current
LOAD CURRENT (A)
0
0
I
TH
VOLTAGE (V)
0.5
1.0
1.5
2.0
2.5
1
234
1735-1 G17
56
V
IN
= 10V
V
OUT
= 3.3V
R
SENSE
= 0.01Ω
f
O
= 300kHz
CONTINUOUS
MODE
Burst Mode
OPERATION
SYNCHRONIZED f = f
O
Maximum Current Sense Threshold
vs Temperature
TEMPERATURE (°C)
–40
60
MAXIMUM CURRENT SENSE THRESHOLD (mV)
65
70
75
80
–15 10 35 60
1735-1 G18
85 110 135
V
SENSE(CM)
= 1.6V
