ltc3831egn-trpbf Linear Technology Corporation, ltc3831egn-trpbf Datasheet - Page 5

• Manufacturer Part Number: ltc3831egn-trpbf
• Description: High Power Synchronous Switching Regulator Controller For Ddr Memory Termination
• Manufacturer: Linear Technology Corporation

TYPICAL PERFORMANCE CHARACTERISTICS
100
3.0
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2.0
99
98
97
96
95
94
93
91
92
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
REFER TO FIGURE 1
V
REFER TO FIGURE 3
FB
–25
–25
–25
= 0V
0
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
25
25
25
50
50
50
75
75
75
100
100
100
3831 G11
3831 G14
3831 G17
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
–8
–9
20
18
16
14
12
10
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 G15
3831 G18
3831 G12
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
70
60
50
40
20
80
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
WITH 1000pF,
A
A
CC
PV
= 25°C
= 25°C
= 25°C
–125
TG AND BG
CC1,2
IFB
OSCILLATOR FREQUENCY (kHz)
Supply Current
100
LOADED
2
– V
OUTPUT CURRENT (A)
= 5V
–100
V
IMAX
IFB
TG AND BG LOADED
200
4
– V
)
–75
LTC3831
WITH 6800pF,
PV
IMAX
CC1,2
300
6
(mV)
–50
= 12V
WITH 6800pF,
PV
TG AND BG
LOADED
CC1,2
400
8
–25
= 5V
3831 G19
3831 G13
3831 G16
3831fa
5
500
10
0