Hi there,
We are using LM2733X to boost VCC12V to Vout(24V), output current load is small, like 10~20mA.
When LM2733 is enabled, VCC12V has momentary drop down, which is not we want to see. As VCC12V is generated from upstream LDO TPS7A4901, whose I_out capacity is max. 150mA. So I think this drop down problem may be caused by inrush current when Vout is ramping.
We do not want to change TPS7A4901. Is there any way to add soft-start to LM2733 circuit, so VCC12V will hold on? SCH and test wave below.
Thanks!
Channel 2 and Channel 3 is VCC12V and Vout(24V) respectively.