BU26154MUV Datasheet, PDF (30/89 Pages) Rohm – High PSRR is attained by built-in regulator

BU26154MUV
Datasheet
In addition, it is necessary to operate LDO for headphone amplifier when operating headphones amplifier. The power up of
headphones amplifier and LDO for headphone set in Analog Reference Power Management Register. Please power up the
headphones amplifier after 1mS waiting time for LDO for headphones. At the time of the power down, please power down
HPVDD after the power down of the headphones amplifier.
HPVDD Power UP/DOWN Sequence
HPVDD ( 0V )
Power Up
HP Power Down
Regout Level
HPVDD Power Down
Power Down
HPVDD Power up
HP Power up and Playback HP Power Down HPVDD Power Down
HPVDDEN
HPLEN or HPREN
Min 1ms
Figure 35
About HPCOM pin
HPCOM pin is a signal ground pin of the headphones amplifier.
Min TBD
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23.Jun.2014 Rev.001