LTC3831 LINER [Linear Technology], LTC3831 Datasheet - Page 4

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

LTC3831
TYPICAL PERFOR A CE CHARACTERISTICS
4
1.270
1.265
1.260
1.255
1.250
1.245
1.240
1.235
1.230
1.270
1.265
1.260
1.255
1.250
1.245
1.240
1.235
1.230
250
230
220
210
200
180
240
190
170
160
–50
–50
–6
Oscillator Frequency
vs Temperature
Output Temperature Drift
Load Regulation
FREQSET FLOATING
REFER TO FIGURE 1
OUTPUT = NO LOAD
T
REFER TO FIGURE 1
NEGATIVE OUTPUT CURRENT
INDICATES CURRENT SINKING
A
–25
= 25 C
–25
–4
0
TEMPERATURE ( C)
OUTPUT CURRENT (A)
TEMPERATURE ( C)
–2
0
25
25
0
50
50
2
75
W
100
75
4
3831 G08
3831 G04
3831 G02
U
125
100
6
20
15
10
5
0
–5
–10
–15
–20
1.260
1.258
1.256
1.254
1.252
1.250
1.248
1.246
1.244
1.242
1.240
600
500
400
300
200
100
3
Line Regulation
0
T
–40
200
180
160
140
120
100
A
Oscillator Frequency
vs FREQSET Input Current
80
60
40
= 25 C
–50
Error Amplifier Sink/Source
Current vs Temperature
–30
4
FREQSET INPUT CURRENT ( A)
–25
SUPPLY VOLTAGE (V)
–20
5
0
TEMPERATURE ( C)
–10
25
6
50
0
7
75
T
A
10
3831 G03
= 25 C
3831 G09
100
8
3831 G06
10
8
6
4
2
0
–2
–4
–6
–8
–10
20
125
800
750
650
600
550
500
700
1.1
0.5
1.5
1.4
1.3
1.2
1.0
0.9
0.8
0.7
0.6
60
55
50
45
40
–50
–50
100
Error Amplifier Open-Loop Gain
vs Temperature
Oscillator (V
vs External Sync Frequency
Error Amplifier Transconductance
vs Temperature
T
A
= 25 C
–25
–25
EXTERNAL SYNC FREQUENCY (kHz)
200
0
0
TEMPERATURE ( C)
TEMPERATURE (˚C)
SAWH
25
25
300
– V
50
50
SAWL
75
75
400
)
100
100
3831 G05
3831 G07
3831 G10
3831f
125
500
125