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LTC3831 Datasheet(PDF) 5 Page - Linear Technology

Part # LTC3831
Description  High Power Synchronous Switching Regulator Controller for DDR Memory Termination
PDF  20 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3831 Datasheet(HTML) 5 Page - Linear Technology

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LTC3831
3831f
TYPICAL PERFOR A CE CHARACTERISTICS
Maximum TG Duty Cycle
vs Temperature
IMAX Sink Current
vs Temperature
Output Overcurrent Protection
Output Current Limit Threshold
vs Temperature
Soft-Start Source Current
vs Temperature
Soft-Start Sink Current
vs (VIFB – VIMAX)
TEMPERATURE (
°C)
–50
91
92
94
95
96
50
100
3831 G11
93
0
–25
75
100
25
125
97
98
99
VFB = 0V
REFER TO FIGURE 3
TEMPERATURE (
°C)
–50
18
25
3831 G12
12
8
–25
0
50
6
4
20
16
14
10
75
100
125
OUTPUT CURRENT (A)
0
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
610
3831 G13
24
8
TA = 25°C
REFER TO FIGURE 1
TEMPERATURE (
°C)
–50
0
1
3
4
5
10
7
0
50
75
3831 G14
2
8
9
6
–25
25
100
125
REFER TO FIGURE 1
TEMPERATURE (
°C)
–50
–9
25
3831 G15
–12
–14
–25
0
50
–15
–16
–8
–10
–11
–13
75
100
125
VIFB – VIMAX (mV)
–150
0.75
1.00
1.25
–75
–25
3831 G16
0.50
0.25
0
–125
–100
–50
1.50
1.75
2.00
0
TA = 25°C
Undervoltage Lockout Threshold
Voltage vs Temperature
VCC Operating Supply Current
vs Temperature
PVCC Supply Current
vs Oscillator Frequency
TEMPERATURE (
°C)
–50
2.0
2.1
2.3
2.4
2.5
3.0
2.7
0
50
75
3831 G17
2.2
2.8
2.9
2.6
–25
25
100
125
TEMPERATURE (
°C)
–50
0.8
1.4
1.5
1.6
0
50
75
3831 G18
0.6
1.2
1.0
0.7
1.3
0.5
0.4
1.1
0.9
–25
25
100
125
FREQSET FLOATING
OSCILLATOR FREQUENCY (kHz)
0
0
10
30
40
50
200
400
500
90
3831 G19
20
100
300
60
70
80
TA = 25°C
TG AND BG LOADED
WITH 6800pF,
PVCC1,2 = 12V
TG AND BG
LOADED
WITH 1000pF,
PVCC1,2 = 5V
TG AND BG
LOADED
WITH 6800pF,
PVCC1,2 = 5V



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