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LP8758-B0: Connection of unused pins

user5064156
Prodigy 110 points
Part Number: LP8758-B0

How to connect NRST, SDA, SCL, nINT, EN2 when controlling ON / OFF of the power supply only with H / L of EN1?
For example, connect to VIN / connect to GND / floating.

  • 0
    TI__Mastermind 33220 points

    Hi, 

      Please make connections as following: 

    1. NRST: connect a  pull-up resistor to VIN and a 0.1uF/16V cap to ground to generate a rising edge slower than VIN rising up to reset the device.
    2. SCL, EN2: connect to GND.
    3. SDA and nINT: floating.

       Depends on your VIN level, the pull-up resistor for NRST should be selected to make sure the final level on the pin should be >1.8V and < 3.3V based on its built-in 1.2M OHm pulldown resistance. Same consideration apples to your on/off control signal EN1; it's should be >1.8V and < 3.3V based on its built-in 0.5M OHm pulldown resistance.

      Please let's know if you have further questions.