SNVA962 December   2020 TPSM5601R5H

 

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6 Summary

The TPSM5601R5H step-down power module can be configured in an IBB topology to generate a negative output voltage by switching the output and ground connections. Converting an original buck topology into an IBB topology reduces the input voltage range and maximum output current. The input voltage range is reduced because the device now has a reference point set to the negative output voltage rather than ground. Additionally, the inductor peak current is much higher, effectively lowering the recommended operating maximum output current range. Additional level-shifting circuitry is required to invert the negative output signal if EN and PGOOD feature utilization is required.