Typical operating characteristics (continued) – Rainbow Electronics MAX17000 User Manual
Page 10
MAX17000
Complete DDR2 and DDR3 Memory
Power-Management Solution
10
______________________________________________________________________________________
Typical Operating Characteristics (continued)
(MAX17000 Circuit of Figure 1, V
IN
= 12V, V
DD
= V
CC
= 5V, SKIP = GND, T
A
= +25°C, unless otherwise noted.)
OUTPUT OVERLOAD WAVEFORM
MAX17000 toc15
400
μs/div
PGOOD2 : 2V/div
PGOOD1 : 2V/div
I
LX
: 10A/div
DL : 5V/div
VDDQ : 1V/div
VTT : 1V/div
VTTR : 1V/div
VDDQ
VTT
VTTR
DL
I
LX
PGOOD2
PGOOD1
VTT VOLTAGE
vs. SOURCE/SINK LOAD CURRENT
MAX17000 toc16
LOAD CURRENT (A)
VTT VOLTAGE (V)
-0.5
0
0.5
1.5
1.0
-1.5 -1.0
0.74
0.73
0.76
0.75
0.78
0.77
0.79
0.72
-2.0
2.0
V
TTI
= 18V
VTT OFFSET VOLTAGE DISTRIBUTION
AT 300mA LOAD
MAX17000 toc17
OFFSET VOLTAGE (mV)
SAMPLE PERCENTAGE (%)
-10.0
-7.5
-12.5
10
20
30
40
50
0
-15.0
-5.0
SAMPLE SIZE = 150
+85
°C
+25
°C
VTT OVERLOAD FAULT WAVEFORMS
(5ms TIMER)
MAX17000 toc20
1ms/div
VTTR : 1V/div
PGOOD1 : 2V/div
PGOOD2 : 2V/div
DL : 5V/div
I
LX
: 2A/div
VDDQ : 2V/div
VTT : 1V/div
VDDQ
VTT
VTTR
DL
I
LX
PGOOD1
PGOOD2
VTT SOURCE CURRENT LIMIT
MAX17000 toc18
CURRENT LIMIT (A)
SAMPLE PERCENTAGE (%)
3.0
3.5
2.5
10
20
30
40
50
0
2.0
4.0
SAMPLE SIZE = 150
+85
°C
+25
°C
VTT SINK CURRENT LIMIT
MAX17000 toc19
CURRENT LIMIT (A)
SAMPLE PERCENTAGE (%)
-3.0
-2.5
-3.5
10
20
30
40
50
0
-4.0
-2.0
SAMPLE SIZE = 150
+85
°C
+25
°C