LTC3831-1 Linear Technology, LTC3831-1 Datasheet - Page 5

• Manufacturer Part Number: LTC3831-1
• Description: High Power Synchronous Switching Regulator Controller
• Manufacturer: Linear Technology

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TYPICAL PERFOR A CE CHARACTERISTICS
100
99
98
97
96
95
93
3.0
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2.0
94
92
91
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
–50
–50
–50
Maximum TG Duty Cycle
vs Temperature
Output Current Limit Threshold
vs Temperature
Undervoltage Lockout Threshold
Voltage vs Temperature
V
REFER TO FRONT PAGE APPLICATION
REFER TO FRONT PAGE APPLICATION
FB
–25
–25
–25
= 0V
0
0
0
TEMPERATURE ( C)
TEMPERATURE ( C)
TEMPERATURE ( C)
25
25
25
50
50
50
75
75
75
W
100
100
100
3831 G11
3831 G14
3831 G17
U
125
125
125
–10
–11
–12
–13
–14
–15
–16
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
20
18
16
14
12
10
–8
–9
8
6
4
– 50
– 50
–50
I
vs Temperature
Soft-Start Source Current
vs Temperature
V
vs Temperature
MAX
FREQSET FLOATING
CC
– 25
– 25
–25
Operating Supply Current
Sink Current
0
0
0
TEMPERATURE ( C)
TEMPERATURE ( C)
TEMPERATURE ( C)
25
25
25
50
50
50
75
75
75
100
100
100
3831 G12
3831 G18
3831 G15
125
125
125
1.75
1.50
1.00
0.75
0.50
2.00
1.25
0.25
60
50
40
20
90
80
70
30
10
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
–150
0
Output Overcurrent Protection
Soft-Start Sink Current
vs (V
PV
vs Oscillator Frequency
0
0
T
T
T
REFER TO FRONT PAGE APPLICATION
A
A
WITH 1000pF,
A
CC
PV
= 25 C
= 25 C
= 25 C
–125
TG AND BG
IFB
2
CC1,2
Supply Current
OSCILLATOR FREQUENCY (kHz)
100
LOADED
– V
= 5V
OUTPUT CURRENT (A)
–100
4
V
IMAX
IFB
TG AND BG LOADED
200
LTC3831-1
– V
6
)
–75
IMAX
WITH 6800pF,
PV
CC1,2
8
300
(mV)
–50
= 12V
WITH 6800pF,
PV
10
TG AND BG
LOADED
CC1,2
400
–25
12
3831 G19
= 5V
3831 G16
3831 G13
38311f
5
500
14
0