XRP7720 Datasheet, PDF (23/28 Pages) Exar Corporation – Quad Output Universal Customizable PMIC with PFM

XRP7720
Quad Output Universal Customizable PMIC with PFM
transitions of a signal applied to the
GPIO/PSIO set to control the group.
Start-up
For each channel within a group a user can
specify the following start-up characteristics:
 Ramp Rate – expressed in milliseconds
per Volt.
 Order –position of a channel to come-up
within the group
 Wait PGOOD? – selecting this option for
a channel means the next channel in the
order will not start ramping-up until this
channel reaches the target level and its
Power Good flag is asserted.
 Delay – an additional time delay a user
can specify to postpone a channel start-up
with respect to the previous channel in the
order. The delay is expressed in
milliseconds with a range of 0 msec to
255 msec.
Shut-down
the Stop Threshold level. The stop
threshold level is fixed at 600mV.
 Delay – additional time delay a user can
specify to postpone a channel shut-down
with respect to the previous channel in the
order. The delay is expressed in
milliseconds with a range of 0 msec to
255 msec.
PROGRAMMING XRP7720
XRP7720ILB-DEV is a FLASH based device
which means its configuration can be
programmed into FLASH NVM and re-
programmed a number of times. The purpose
of this feature is to provide a means to fast
development times.
Programming of FLASH NVM is done through
PA 5.1.
For each channel within a group a user can
specify
the
following
shut-down
characteristics:
 Ramp Rate – expressed in milliseconds
per Volt.
 Order –position of a channel to come-
down within the group
 Wait Stop Thresh? – selecting this
option for a channel means the next
channel in the order will not start
ramping-down until this channel reaches
© 2014 Exar Corporation
23/28
Rev. 1.0.0