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TPS3700: to watch negative power supplies

Part Number: TPS3700

Hello,

I want to use the TPS3700 IC for measuring negative voltages. i see on figure 5-9 of SLYY167-1pdf (page 28) two diodes connected on the outputs of TPS3700. I run a simulation using model of TPS3700 provided by TI.

Simulation gives the same result with and without. Do we really need those diodes?

Best regards,

Christophe