SLVUBU5A May 2020 – December 2020 LM7481-Q1
To verify the startup behavior, connect the oscilloscope to the evaluation module:
Figure 5-2 Power up: DGATE and HGATE
Figure 5-3 Power Up: Charge Pump and Inrush CurrentAdditional startup information is captured in Figure 5-3. Channel 3 captures the charge pump voltage on VCAP pin during startup. Charge pump turns on when POR threshold on VIN is reached and builds up to 13.5 V above VIN.