LTC3589_1 Datasheet, PDF (42/46 Pages) Linear Technology – 8-Output Regulator with Sequencing and I2C

LTC3589
APPLICATIONS INFORMATION
to select between run and standby voltages and using
minimal software overhead to set the overdrive voltage
in I²C command registers.
The default DAC reference value in all xxBTVx registers
is 0x19. This accommodates i.MX processors and others
requiring an overdrive voltage. The value can be increased
up to 0x1F for overdrive or supply margining above the
nominal run voltage. Once programmed into the I²C com-
mand registers xxBTVx two voltage outputs are selected
by the VSTB pin. All voltage levels and changes are fully
controllable using the I²C serial port.
OMAP3 and DaVinci Processor Support
The OMAP3 family of ARM processors has similar require-
ments to the processors described above. The LTC3589 I²C
control can fully accommodate the smart reflex dynamic
voltage control with proper embedded software drivers
tailored to the LTC3589 register mapping. The LTC3589
demo board demonstrates configuring and dynamically
slewing and sequencing the outputs using I²C control. The
same provisions can be incorporated into embedded soft-
ware drivers for the OMAP3 or any other target processor.
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