General Control and LDO Settings
Individual enable register for each power rail, default are all enabled.
6.4
System Control
Figure 12.
Two dropdown boxes for selecting buck power operating mode PWM Only or Auto (note the default is
PWM mode) — please contact TI sales office if the auto/PFM mode is needed. The third dropdown box is
used for selecting power up/down sequence delay when EN_T control is used.
6.5
LDO Output Control
Figure 13.
Two slide bars are used to change the LDO outputs.
6.6
Buck Voltage & Ramp Rate Control
Figure 14.
These four drop-down boxes are used to select target voltage and ramp for both buck regulators, please
read the LP8731Q datasheet link for detail information. Read button is for updating/reading the latest
register values.
10
LP8731-Q1 Evaluation Board
SNVU458 – November 2014
Copyright © 2014, Texas Instruments Incorporated
