Rainbow Electronics MAX8720 - Manual (Page 19)

SMPS is active, initiating a transition to a new output
voltage level. If this mode of DAC control is used, con-
nect SUS low. Change D0–D5 together, avoiding
greater than 50ns skew between bits. Otherwise, incor-
rect DAC readings may cause a partial transition to the
wrong voltage level, followed by the intended transition
to the correct voltage level, lengthening the overall tran-
sition time. The available DAC codes and resulting out-
put voltages are shown in Table 4. Suspend Mode (S0, S1, SUS)
When the CPU enters low-power suspend mode, the
processor sets the regulator to a lower output voltage
to reduce power consumption. The MAX8720 includes
a suspend-mode input (S0, S1) and a digital SUS con-
trol input. The suspend voltage is programmed using
the 4-level S0, S1 inputs (Table 5). The suspend volt-
age adjustment range is from 0.275V to 0.650V.
MAX8720
Dynamically Adjustable 6-Bit VID
Step-Down Controller
______________________________________________________________________________________ 19
D5 D4 D3 D2 D1 D0 V OUT D5 D4 D3 D2 D1 D0 V OUT
0 0 0 0 0 0 1.850 1 0 0 0 0 0 1.050
0 0 0 0 0 1 1.825 1 0 0 0 0 1 1.025
0 0 0 0 1 0 1.800 1 0 0 0 1 0 1.000
0 0 0 0 1 1 1.775 1 0 0 0 1 1 0.975
0 0 0 1 0 0 1.750 1 0 0 1 0 0 0.950
0 0 0 1 0 1 1.725 1 0 0 1 0 1 0.925
0 0 0 1 1 0 1.700 1 0 0 1 1 0 0.900
0 0 0 1 1 1 1.675 1 0 0 1 1 1 0.875
0 0 1 0 0 0 1.650 1 0 1 0 0 0 0.850
0 0 1 0 0 1 1.625 1 0 1 0 0 1 0.825
0 0 1 0 1 0 1.600 1 0 1 0 1 0 0.800
0 0 1 0 1 1 1.575 1 0 1 0 1 1 0.775
0 0 1 1 0 0 1.550 1 0 1 1 0 0 0.750
0 0 1 1 0 1 1.525 1 0 1 1 0 1 0.725
0 0 1 1 1 0 1.500 1 0 1 1 1 0 0.700
0 0 1 1 1 1 1.475 1 0 1 1 1 1 0.675
0 1 0 0 0 0 1.450 1 1 0 0 0 0 0.650
0 1 0 0 0 1 1.425 1 1 0 0 0 1 0.625
0 1 0 0 1 0 1.400 1 1 0 0 1 0 0.600
0 1 0 0 1 1 1.375 1 1 0 0 1 1 0.575
0 1 0 1 0 0 1.350 1 1 0 1 0 0 0.550
0 1 0 1 0 1 1.325 1 1 0 1 0 1 0.525
0 1 0 1 1 0 1.300 1 1 0 1 1 0 0.500
0 1 0 1 1 1 1.275 1 1 0 1 1 1 0.475
0 1 1 0 0 0 1.250 1 1 1 0 0 0 0.450
0 1 1 0 0 1 1.225 1 1 1 0 0 1 0.425
0 1 1 0 1 0 1.200 1 1 1 0 1 0 0.400
0 1 1 0 1 1 1.175 1 1 1 0 1 1 0.375
0 1 1 1 0 0 1.150 1 1 1 1 0 0 0.350
0 1 1 1 0 1 1.125 1 1 1 1 0 1 0.325
0 1 1 1 1 0 1.100 1 1 1 1 1 0 0.300
0 1 1 1 1 1 1.075 1 1 1 1 1 1 0.275
Table 4. Output Voltage vs. DAC Codes