88PG8227A1-NFE1C000 Marvell, 88PG8227A1-NFE1C000 Datasheet - Page 25

• Manufacturer Part Number: 88PG8227A1-NFE1C000
• Description: MVL88PG8227A1-NFE1C000 1 MHZ DUAL STEP D
• Manufacturer: Marvell

3.2.3
Table 12: AnyVoltage™ Programming Table for 1% Resistors
Copyright © 2008 Marvell
April 23, 2008, 2.00
1 8 .7 k
3 1 .6 k
5 3 .6 k
9 7 .6 k
1 6 5k
2 8 0k
4 7 5k
11 k
Output Voltage – AnyVoltage™ Technology
The output voltage of the step-down switching regulator is programmed by using
to select resistor values for VSET and PSET pin. The VSET pin sets the output voltage and the
PSET pin trims the set voltage to a percentage value. For example, to program 2.25V output, a 165
kΩ resistor is selected for the VSET pin, and an 11 kΩ resistor is selected for the PSET pin. The 165
kΩ resistor sets the output voltage to 2.5V and the 11 kΩ resistor trims the set voltage by -10%.
Using the VSET resistor’s value greater than 619 kΩ or less than 7.68 kΩ disables the step-down
switching regulator and sets the SW pin to high impedance. If the VSET resistor’s value is outside
the 5% tolerance, the output can be either higher or lower than the set voltage.
Using resistor values greater than 619 kΩ or less than 7.68 kΩ for the PSET pin does not affect the
set voltage. When the PSET pin is not used, it must be connected to ground. Like the VSET resistor,
the percent value can be either higher or lower if the PSET resistor’s value is outside the 5%
tolerance.
-10.0%
0.720
0.900
1.080
1.350
1.620
2.250
2.700
2.970
11 k
- 7 . 5 %
1 8. 7 k
0.740
0.925
1.388
1.665
2.313
2.775
3.053
1.110
Document Classification: Proprietary Information
- 5 . 0 %
3 1 . 6 k
0.760
0.950
1.140
1.425
1.710
2.375
2.850
3.135
- 2 . 5 %
5 3 .6 k
0.780
0.975
1.170
1.463
1.755
2.438
2.925
3.218
P SE T
G N D
0.800
1.000
1.200
1.500
1.800
2.500
3.000
3.300
0 %
9 7 . 6 k
2 . 5%
0.820
1.025
1.230
1.538
1.845
2.563
3.075
3.383
5 . 0 %
1 6 5 k
0.840
1.050
1.260
1.575
1.890
2.625
3.150
3.465
Functional Description
Doc. No. MV-S103563-00 Rev. C
Output Voltage Settings
7 . 5 %
2 8 0 k
0.860
1.075
1.290
1.613
1.935
2.688
3.225
3.548
Table 8
or
1 0 .0 %
4 7 5 k
0.880
1.100
1.320
1.650
1.980
2.750
3.300
3.630
Table 9
Page 25