AK4955 Datasheet, PDF (67/117 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/SPK/Cap-less VIDEO-AMP/ LDO & DSP

[AK4955]
■ Regulator Block
The AK4955 integrates a regulator. The 3.3V (typ) power supply voltage from the AVDD pin is converted to 2.3V (typ)
by the regulator and supplied to the analog blocks (MIC-Amp, ADC, DAC, MIN, Video-Amp). The regulator is powered
up by PMVCM bit = “1”, and powered down by PMVCM = “0”. Connect a 2.2µF (± 50%) capacitor to the REGFIL pin
to reduce noise on AVDD.
AK4955
Power-up: PMVCM bit =“1”
Power-down: PMVCM bit = “0”
AVDD
Regulator
typ 2.3V
REGFIL
2.2μF ± 50%
Figure 54 Regulator Block
To Analog Block
MS1343-E-00
- 67 -
2011/12