LTC3831 LINER [Linear Technology], LTC3831 Datasheet - Page 5

• Manufacturer Part Number: LTC3831
• Description: High Power Synchronous Switching Regulator Controller for DDR Memory Termination
• Manufacturer: LINER [Linear Technology]

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
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 FIGURE 3
REFER TO FIGURE 1
FB
–25
–25
–25
= 0V
0
0
TEMPERATURE ( C)
0
TEMPERATURE ( C)
TEMPERATURE ( C)
25
25
25
50
50
50
75
75
75
W
100
100
100
3831 G11
3831 G17
3831 G14
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
1.4
1.2
1.0
0.8
0.6
0.4
0.2
90
80
70
60
50
40
20
30
10
0
0
0
–150
0
0
Output Overcurrent Protection
Soft-Start Sink Current
vs (V
PV
vs Oscillator Frequency
T
T
REFER TO FIGURE 1
T
A
A
WITH 1000pF,
A
CC
= 25 C
PV
= 25 C
= 25 C
TG AND BG
–125
CC1,2
IFB
OSCILLATOR FREQUENCY (kHz)
Supply Current
100
LOADED
2
– V
OUTPUT CURRENT (A)
= 5V
–100
V
IMAX
TG AND BG LOADED
IFB
200
4
– V
)
–75
WITH 6800pF,
PV
IMAX
LTC3831
CC1,2
300
6
(mV)
–50
= 12V
WITH 6800pF,
PV
TG AND BG
LOADED
CC1,2
400
8
–25
3831 G19
= 5V
3831 G13
3831 G16
5
3831f
500
10
0