I am trying to provide a switching mechanism from an MCU to turn on/off a Trico DC-DC Isolator circuit that drives an LDO and 555 Timer. I am attempting to use a BC547 transistor to provide switching capability to the Trico DC-DC isolator. I also tried a 2n7000 Mosfet and have similar results. The Trico TBA1-0311 (Datasheet) takes a 3V input from the transistor and boosts it to 5V. The output is then sent to a LP2950 (Datasheet) LDO to get a clean 3.3V to send to a 555 timer.
The output voltage from the BC547 is measured at ~3.3V but as soon as the DC-DC isolator is added, the voltage drops significantly before the DC-DC isolator drops to 0.5V and the output from DC-DC isolator is about 1V.
Is there a better way to do this? I am very new to Isolators and can't quite figure out why I am not getting the output voltage I need. Attached is a partial schematic of the circuit. Any guidance would be much appreciated!
The output voltage from the BC547 is measured at ~3.3V but as soon as the DC-DC isolator is added, the voltage drops significantly before the DC-DC isolator drops to 0.5V and the output from DC-DC isolator is about 1V.
Is there a better way to do this? I am very new to Isolators and can't quite figure out why I am not getting the output voltage I need. Attached is a partial schematic of the circuit. Any guidance would be much appreciated!