Hi, LMR36503-Q1 is rated for 300 mA, but for my design, there are short (20 usec) current spikes that are 400 mA. Is that acceptable and not damaging to the part?
Thanks
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Hi, LMR36503-Q1 is rated for 300 mA, but for my design, there are short (20 usec) current spikes that are 400 mA. Is that acceptable and not damaging to the part?
Thanks
Hi Wen,
The part can handle a DC load current of 300mA but the current limit includes the AC inductor ripple current and the current limit specs are show below:
Ben
Hi Wen,
If there are no further questions, please close the thread by clicking on "resolved". Thank you,
Ben
Hi Wen,
Can you provide me more details of the conditions when you took these scope photos? How are you measuring the current? Are you using a current probe?
Ben
Hi Ben,
Both captures are using current probe. For the one with 2 traces, 1 mV equals 1 mA, the bottom trace zooms into the top trace. Peak is 354 mA, Time scales are 5 ms per division and 200 usec per division. The bottom dotted line is at 300 mA.
For the other capture, it's already in mA scale, it's taken with different condition, so the current is different.
Thank you!
Hi Wen,
At what event did you capture these plots? For example, a short circuit event?
Ben
Hi Wen,
How much capacitance does the output have?
Ben
Hi Ben,
Just to clarify, the captures were with a different DCDC converter and the waveforms are part of device initialization (not a power up sequence). I have not powered my device with a LMR36503-Q1 yet. We will use what the data sheet recommends.
Wen
Hi Wen,
Got it. Go ahead and create a new thread if there are any issues using the LM36503-Q1.
Ben