LMR14030-Q1: Hardware review_LMR14030SQDDARQ1

Hello

Please double check your design using Webench.

A 0.1uF ceramic is required on the input, in addition to the 10uF you have.

This capacitor must be placed close to the VIN and GND pins of the device.

The 100uF output capacitor must have low ESR.  Two 47uF ceramics can be substituted for the 100uF Al.

Be sure that the inductor and diode are rated for the current limit of the device.

Thanks

Hi Frank,

Thanks for the Quick review comments.

My Answers are inlined below.

1. Please double check your design using Webench.

Manjunth : Okay, I have designed this circuit using Webench and verified it.

2. A 0.1uF ceramic is required on the input, in addition to the 10uF you have.

Manjunth : Webench doesn't contain 0.1uF in addition to  10uF, any specific reason for you to say.

3. This capacitor must be placed close to the VIN and GND pins of the device.

Manjunth : Yes Noted

4. The 100uF output capacitor must have low ESR.  Two 47uF ceramics can be substituted for the 100uF Al.

Manjunth : I kept same Part number suggest by the Webench with low ESR. I can keep 100uF?

5. Be sure that the inductor and diode are rated for the current limit of the device.

Manjunth : Okay noted, I have followed same as Webench

6. When placing the multiple decoupling capacitors near the input and output pins of an IC, smaller vale capacitor should be placed near the supply pins first or larger value Cap placed near the supply pins?

Thanks

Hello

The data sheet recommends a 0.1uF on the input.

The smaller values of input capacitor should go near the device.

The larger values of output capacitor should go near the inductor.

The FB point should be closer to the output capacitors.

I think the schematic is OK.  When you are ready please send your PCB

layout for us to review.

Also, you can get an EVM for this device to use as a guide and testing platform.

Thanks

Hi Frank,

Thanks, Please find the updated schematic.