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DRV8305-Q1: BOOSTXL-DRV8305EVM under 5V Operation

Part Number: DRV8305-Q1
Other Parts Discussed in Thread: BOOSTXL-DRV8305EVM, LMR16006

Dear, Sir.

My customer is evaluating DRV8305-Q1 with 5V MCU for their system.

At this time, They would like to makesure the function using 5V MCU interface

includes SPI.

I think BOOSTXL-DRV8305EVM could be utiliized applying following modification.

1) Remove U2(LMR16006) & L1.

2) Supply 5V from L1 output pad.

D1, D2 & Capacitors are mounted on this EVM and BOM is not sure.

I would like to double-confirm 5V operation will be possible taking above modifaction

without any component breakdown.

Please give your advice.

Best Regards,

H. Sakai

  • The device should work regardless of removing the LDO. However, if the LDO is removed, there should be no problem powering the device. Looking at the other components' ratings, the LEDs and TVS are rated for 5V so they should continue to operate without damage. However, you may need to check the current sense amplifiers and Rsense due to changing Vvref (section 7.3.5.3 and 8.2.2.4).

    Regards,

    Mostafa