LTC3731 Linear Technology, LTC3731 Datasheet - Page 7

• Manufacturer Part Number: LTC3731
• Description: Synchronous Buck Switching Regulator Controller
• Manufacturer: Linear Technology

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TYPICAL PERFOR A CE CHARACTERISTICS
80
70
60
50
40
30
20
10
80
70
60
50
40
30
20
10
5
4
3
2
0
0
0
1
–50
PERCENTAGE OF NOMINAL OUTPUT VOLTAGE (%)
0
0
Maximum I
Percentage of Nominal Output vs
Peak I
Short-Circuit Arming and Latchoff
vs Temperature
ARMING
LATCHOFF
10
–25
1
SENSE
20
V
0
TEMPERATURE (°C)
30
RUN/SS
SENSE
2
(Foldback)
40
25
VOLTAGE (V)
50
3
vs V
50
60
RUN/SS
4
70
75
W
80
5
100
3731 G10
3731 G13
90
3731 G16
U
100
125
6
2.4
2.0
1.6
1.2
0.8
2.8
0.4
0
–50
100
Supply Current vs Temperature
98
96
94
90
75
50
25
92
0
–50
V
CC
Maximum Current Sense
Threshold vs Duty Factor
0
Maximum Duty Factor vs
Temperature
–25
= 5V
–25
20
TEMPERATURE (°C)
0
0
TEMPERATURE (°C)
DUTY FACTOR (%)
25
40
25
50
50
60
75
V
PLLFLTR
75
100
80
3731 G11
100
= 0V
3731 G17
3731 G14
125
100
80
60
40
20
0
100
125
–15
–10
–20
–30
2.5
2.0
1.5
1.0
0.5
40
30
20
10
75
60
45
30
15
0
0
0
–50
RUN/SS Pull-Up Current vs
Temperature
0
Peak Current Threshold vs V
0
I
SENSE
V
RUN/SS
–25
Pin Current vs V
1
0.6
= 1.9V
TEMPERATURE (°C)
0
2
25
V
V
OUT
ITH
1.2
LTC3731
(V)
(V)
50
3
OUT
75
1.8
4
100
ITH
3731 G12
3731 G15
3731 G18
3731fa
7
125
2.4
5