LMR33620-Q1: Please recommend a Low EMI device

robin Moon

Part Number: LMR33620-Q1
Other Parts Discussed in Thread: LMR33620, LMR43620, LMR33630-Q1, LM76002, TPS7A91, TPS7A47, TPS7A20

Tool/software:

hi experts,

Please recommend the two products below.

1. Low EMI Step down converter

- input voltage: 12 - 28VDC

- output voltage : 5V

- Current : 1.5~2A

- Please recommend a product with excellent EMI performance among LMR33620 and LMR43620.
Or please recommend another better device

2. LDO

- Input Voltage : 5V

- Output Voltage : 3.3V

- Current : 0.5A

- Please recommend LDO that has less impact from EMI

thanks,

0 Naresh Adepu 19 days ago

Thanks for your question. we will look into it and get back to you

Thanks and Regards,

naresh

0 Naresh Adepu 19 days ago in reply to Naresh Adepu

Hi,

For your buck converter requirement (12–28 V → 5 V, 1.5–2 A):

Both LMR33620 and LMR43620 are good options.
If EMI performance is the main concern, the LMR43620 is preferred. It includes spread spectrum modulation and improved packaging for lower radiated EMI compared to the LMR33620.
If you need more margin, you can also look at LMR33630-Q1 (3 A).
For even stricter EMI requirements, the LM76002/03-Q1 family is another good candidate.

For the LDO (5 V → 3.3 V, 0.5 A):

A good balance of performance and availability is the TLV76733 (up to 1 A).
For higher PSRR and lower noise/EMI sensitivity, consider TPS7A91 or TPS7A47 families depending on your noise requirements.
If current <200 mA, the TPS7A20 is an ultra-low noise option.

Hope this helps!

Thanks and Regards,

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