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TIDA-01371: floating posistive regulator 55V 6A continuous service

Part Number: TIDA-01371
Other Parts Discussed in Thread: CSD19533KCS


I would like to use the TIDA-01371 to have +55V @6A at the output, continuous service.

I am expecting high PSRR and Low Drop Voltage.

The circuit will be placed after an industrial SMPS with 200mVpp of ripple and I have to clean and isolate the output.

I would like to avoid the use of LCR filters. 

I planned to add a heatsink at the CSD19533KCS.

Can I have the TINA file about the schematic reported at "TIDA-01371_E2_Positive-Regulator.SchDoc" pag 2 of 5?

So I can simulate the behaviours ... unfortunately I am not so skilled with TINA and I scare to introduce mistakes. 



  • Hello Mario,

    Thank you for your interest in TIDA-01371.

    TIDA-01371 is targeted for pulsed operation (1ms high current pulses as highlighted in the design guide of TIDA-01371). It will not be able to handle such high continuous power.

    As you might know, the MOSFETs have Safe Operating Area (SOA) curves which restrict them to have very high overall power dissipation (depends on voltage, current and time). Please check the datasheet of MOSFET and also the calculations as we have provided in TIDA-01371 design guide.

    Also, I would like to highlight that TIDA-01371 will not help improving the PSRR because it uses floating ground concept. The ground needs to be low-impedance to get good PSRR. You can use some power filter techniques for filtering, if you don't want to use LC filters at the outputs.

    Nevertheless, I am attaching TINA files for positive regulator circuit. Hope it helps.




    Sanjay R. Pithadia

  • Thank you.

    Finally I descigned a 2 stages filter, one passive  and the seocnd one active and I solved the matter.

    Best regards.