• LT8642S LTSpice Simulations

    Hi everyone. I want to analyse the transient and steadt state simulations of LT8642 with requirements 13<Vin<17 Volts, Vout = 12V and maximum output current 10A. I used LTPowerCad for design and I applied same values for LTSpice simulation. When I try…

  • LT8642S AEC Qualification

    Is there any plan to perform AEC-Q100 automotive qualification testing on LT8642S?  It looks like a very useful device, but I need automotive-grade.

  • LT8642S - Enable Pin

    Hi,

    Is there a requirement that the EN pin of the LT8642S must be stable before VIN is applied? I am simulating a 1V, 6A regulator circuit using LTSPICE and I see that if the EN pin is not Up before applying VIN, the regulator does not produce any output…

  • LT8642S- spread spectrum rejection

    I have been testing a new part, the LT8642S. All looks good but I have seen a low frequency signal content on the output ripple.

    This is the test circuit:

    Looking before and after the output ripple filter I can see the ripple due to switching at 1MHz…

  • use LT8642S as inverting Buck Regulator

    I like to design a DCDC Converter that generates a negativ Voltage of 3,3V. The Circuit is supplyed from positiv 12V.

    I'm using at the same PCB a LT8642S as positiv Buck Regulator. To keep the amount of different components small, i like to use a sec…

  • LT8642S Parallel 20A with soft start and mode control

    Hi,

    We intend to connect two LT8642S in parallel as explained in the applications information section of the datasheet.

    However, there is some confusion as to how to connect some of the pins.

    1. TR/SS Soft Start

    Should the TR/SS pin of each regulator…

  • RE: LT8640S - LTspice simulation of synchronous clocking - example jig does not seem to support this modelling

    and LT8642 LTspice jig is the only one from this family I could get to sync to an external clock.

    I am curious to learn what can be the reason.

  • RE: Need to create 5V 7A LDO

    To get a 5V 7A from 12VDC, the power dissipation is 49W, which is too much for LDOs. By using two LT1084s in parallel, the power loss on each LDO is still high,  24.5W. A buck converter is a good choice, such as LT8642S. If using LDO is the only choice…

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