Hi,
I'm working with the TPS61041 and TPS7A4901 to power an audio amp. The TPS61041 steps up a single cell lithium battery to around 5.85V and the TPS7A4901 regulates and cleans this down to 5.5V. Op amps in the audio chain are single supply (OPA4314) and their virtual ground is derived from the 5.5V supply hence 5.5V must be very clean.
The TPS61041 reference design calls for a 10uF output capacitor and the TPS7A4901 reference design calls for a 10uF input capacitor. Since these two IC's are right next to each other on the board, do I really need both these capacitors? Will one suffice? Typical output current from the TPS7A4901 is 50mA.
Finally, is there a different IC combination that you would recommend that is preferred to the above approach?
Kind regards,
ac