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Original question:

LP3906: SW1 and SW2

LP3906: solution recommendation

Brian Chan
Expert 6880 points
Part Number: LP3906
Other Parts Discussed in Thread: TPS65217

Tool/software:

Hi Team

below is my customer side requirement

  Input Vbat=3V to 4.3 or 4.4V,always output is 1.8V or 1.9V.For the other three power rail,the VLED can be switch power source depend on charging or not,if on the charging this power rail will be from VBAT,but when charging is from VBUS.

The VPOD is 2V and other V30 for current source is 3.0V. and TYPE C input,but input power voltage is 5V level. Thanks!

do you have any recommendation ?

BRs

Brian

  • 0
    TI__Expert 6880 points

    Hi Team

    add reference SCH as below.

    BRs

    Brian

  • 0
    TI__Genius 11517 points

    Hello Brian, 

    I may recommend looking at the TPS652170 / TPS65217x  family, which can support Battery and USB input. 
    (TPS652170 is the programmable option)

    DCDC1 or LDO1 can be fixed to output 1.8V, and LDO1 & LDO2 can be adjusted to support outputs 1 V - 3.3 V. 
    If I understood correctly and VPOD and V30 are desired voltage rails, then the LDOs can support this.

    Please take a closer look and let me know if there are further specifications / questions you have.

    Best Regards, 
    Sarah