Datasheet

t − Time − 1 ms/div
VDDQ
VTTREF
VTT
S5
I
VDDQ
= I
VTT
= I
VTTREF
= 0 A
t − Time − 200 µs/div
VDDQ
VTTREF
VTT
S5
I
VDDQ
= I
VTT
= I
VTTREF
= 0 A
100
−40
−80
1 k 100 k 1 M
−60
20
−20
0
80
40
60
−90
45
−45
0
180
90
135
−180
−135
f − Frequency − Hz
Gain − dB
Phase − 5
Phase
Gain
I
VDDQ
= 7 A
10 k
Gain − dB
Phase − 5
10 k
−40
−80
100 k
1 M
10 M
−60
20
−20
0
80
40
60
−90
45
−45
0
180
90
135
−180
−135
Phase
Gain
f − Frequency − Hz
I
VTT
= −1 A
TPS51116
www.ti.com ................................................................................................................................................................ SLUS609H – MAY 2004 – REVISED JULY 2009
TYPICAL CHARACTERISTICS (continued)
Figure 32. Soft-Start Waveforms Tracking Discharge Figure 33. Soft-Stop Waveforms Non-Tracking Discharge
VDDQ BODE PLOT (CURRENT MODE) VTT BODE PLOT, SOURCE (DDR2)
GAIN AND PHASE GAIN AND PHASE
vs vs
FREQUENCY FREQUENCY
Figure 34. Figure 35.
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