Hi DAniel,
You can follow app note snva803 for power stage layout. Also, the comprehensive layout guidelines in the LM5145 datasheet apply to all buck controllers.
The LM5145 and LM5146-Q1 EVM layouts are also instructive, and the Altium source…
Atharva,
If Q grade is not required, you can check the commercial version (LM5141). Also, the LM25141-Q1 is the same IC as the LM5141-Q1 except Vin-max is 42V.
And if your design is not finalized, you can also consider the LM5146-Q1 (Vin-max …
Hi Daniel,
Take a look at the LM5146-Q1 and LM25149-Q1 EVMs for our latest layout recommendations. These are effectively single-sided designs. Placing the EMI filter on the board is beneficial as the filter is then shielded from the radiating SW node…
I spoke with the application engineer for this device.
This device may not be the best choice for you application.
He has suggested the LM5145 or the LM5146.
You could use the LM5146 EVM as a starting point.
Part Number: LM5164-Q1 Other Parts Discussed in Thread: LM5146 Hi team,
What would be expected behavior with the following condition?
Would it operate, or would there be no output?
EN/UVLO open
RON open
FB open
I tried to see the behavior…
Part Number: LM5145 Other Parts Discussed in Thread: CSD19534Q5A , LM5146-Q1 Hi,
The customer wants to change the vin capacitor due to supply and demand issue.
Please give us your opinion on the choice of Spec.
2744.201013_Main_Power_LM5145 Schematic…
Hey Tim,
I removed the tantalum and just have 100uf and 47uf ceramics which is what is on the board. I then replaced the RCOMP2 from the 35.7K value recommneded by webench to 49.9 Ohms and everything started to work properly. I had one board that I…
Hi Emanuele,
The temperature rise doesn't sound excessive, but it shouldn't increase at light loads.
Please send the schematic and a completed quickstart calculator file for review. It's possible the selected MOSFETs are switching loss dominant…
Hi Phil,
Given the Fsw of 550kHz, try 2.2 Ohms and 220pF for the snubber. Also, take a look at the rising edge of the SW voltage to see if it rings - if so, the snubber should help that, but you can also increase the Rboot resistor if needed.
…
