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LED Driver implementing analog dimming by adjusting the internal reference voltage

Hello,

I'm looking for an LED driver which implements analog dimming by adjusting the internal reference voltage based on the duty cycle of a PWM input, similar to TI's TPS54201. I can't use this part though, as I want to simulate the circuit in LTSpice, so I'm looking for a part with an LTSpice model available. The maximum supply voltage in my design is 5 V and the continuous output current should be around 1 A. Could you please recommend a part that satisfies these requirements? Alternatively, if there is no such part in the portfolio, could you suggest a way to implement this dimming functionality using an available part?

Any advice is highly appreciated.

Best regards,
Laura

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