ADP125: Protection diode required?

Hi everyone,

I'm designing a circuit with some ADP125 LDOs for the analog supplies. In the abs. max. ratings, there is a requirement for VOUT:

VOUT to GND | -0.3V to VIN

This would clearly indicate that the regulator needs a reverse diode from VOUT to VIN, however, this is not present on the evaluation board. Since the pass transistor is a P-channel MOSFET, I'd expect there to be an internal diode anyway. So is there still an external Schottky required?

Thanks. Best regards,

Philipp

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  • Hi Doc,

    thanks for your response! I won't supply external power to the output, it's just about the capacitance which is there and must be discharged. Since you mention a body diode and a protection, I suppose that the part has both and hence, I don't need to worry.

    Regards,

    Philipp

Reply
  • Hi Doc,

    thanks for your response! I won't supply external power to the output, it's just about the capacitance which is there and must be discharged. Since you mention a body diode and a protection, I suppose that the part has both and hence, I don't need to worry.

    Regards,

    Philipp

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