ACT8810
Active- Semi
Rev 4, 01-Oct-09
STEP-DOWN DC/DC CONVERTERS
REGISTER DESCRIPTIONS CONT’D
Table 6:
REG1/VSETx[ ] Output Voltage Setting
REG1/VSETx[5:4]
REG1/VSETx[3:0]
REG1/VRANGE[ ] = [0]ꢀ
REG1/VRANGE[ ] = [1]
00
Adjustableꢁ
0.800
0.800
0.800
0.800
0.800
0.800
0.800
0.825
0.850
0.875
0.900
0.925
0.950
0.975
1.000
01
10
11
00
Adjustable
1.300
1.350
1.400
1.450
1.500
1.550
1.600
1.650
1.700
1.750
1.800
1.850
1.900
1.950
2.000
01
10
11
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
1.025
1.050
1.075
1.100
1.125
1.150
1.175
1.200
1.225
1.250
1.275
1.300
1.325
1.350
1.375
1.400
1.425
1.450
1.480
1.500
1.525
1.550
1.575
1.600
1.625
1.650
1.675
1.700
1.725
1.750
1.775
1.800
1.825
1.850
1.875
1.900
1.925
1.950
1.975
2.000
2.025
2.050
2.075
2.100
2.125
2.150
2.175
2.200
2.050
2.100
2.150
2.200
2.250
2.300
2.350
2.400
2.450
2.500
2.550
2.600
2.650
2.700
2.750
2.800
2.850
2.900
2.950
3.000
3.050
3.100
3.150
3.200
3.250
3.300
3.350
3.400
3.450
3.500
3.550
3.600
3.650
3.700
3.750
3.800
3.850
3.900
3.950
4.000
4.050
4.100
4.150
4.200
4.250
4.300
4.350
4.400
ꢀ: Care must be taken when adjusting the VRANGE[ ] selection at address 13h bit-6 to avoid undesired output voltage selections. The
VRANGE bit allows selection of the two output voltage ranges available for REG1, REG2 and REG3 (VRANGE = 0 – VOUT range 0.8V
to 2.2V, VRANGE = 1 – VOUT range 1.3V to 4.4V). It is recommended that the user first establishes if the new VOUT voltage is within the
current selected voltage range (selected by VRANGE) prior to changing the value of the VRANGE bit.
ꢁ: Refer to the Output Voltage Programming section for more information.
Innovative PowerTM
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