TPS543620: TPS543620 spice model encrypted for LTSPICE

Based on the information typically provided by Texas Instruments (TI) for their complex integrated circuits like the TPS543620, and the nature of SPICE model encryption:

1. TI's Provided Models: TI generally provides encrypted SPICE models for their power management ICs, but these are almost exclusively in PSpice format or for their own TINA-TI simulator.
2. Encryption and Simulator Compatibility: Encrypted SPICE models are typically tied to the specific simulator they were encrypted for. PSpice's encryption method is proprietary and different from how LTspice handles encryption. Therefore, an encrypted PSpice model cannot be directly used or decrypted by LTspice.
3. LTspice Specific Models: TI does not typically provide native, encrypted SPICE models specifically for LTspice.

In summary, it is generally not possible to obtain an encrypted SPICE model for the TPS543620 from TI that is directly usable in LTspice.

What you can do:

• Use TI's PSpice Model: TI provides an encrypted PSpice transient model for the TPS543620 on its product page (under "Tools & software" → "Design tools"). You would need to use a PSpice simulator (such as the free "PSpice for TI" version) to run simulations with this model.
• Use TINA-TI: TI also provides encrypted models and reference designs for their free TINA-TI simulator, which is another excellent option for simulating TI parts.
• Behavioral Model (Advanced): If you absolutely must use LTspice and an unencrypted model isn't available (which it typically isn't for complex ICs like this), your only option would be to create a simplified behavioral model of the TPS543620 in LTspice. This is a very complex task, requires a deep understanding of the IC's internal workings, and will likely not be as accurate as the manufacturer's full model.
• Community Models (Unofficial): Occasionally, users might create simplified, unencrypted models for LTspice and share them online. However, these are unofficial, not guaranteed for accuracy, and may not cover all features or operating conditions.

For accurate and reliable simulations of the TPS543620, your best approach is to use the PSpice model provided by TI with a compatible PSpice simulator (like PSpice for TI) or use TINA-TI.