Part Number: TPS63001
Currently we are using TPS63001 fixed 3.3V output DC-DC Converter. As per the TPS63001 DC-DC converter datasheet, module taking Quiescent current (Iq) is less than 50uA. This quiescent current is applicable for without load?. In my design the module is taking 6mA current without connecting load. This 6mA current taking the module is correct for the without load?. If it is correct, can you please suggest me alternative Buck/Boost DC-DC converter for same footprint. I have attached the reference circuit also, this circuit i took it from datasheet.
Yusuf Siddik S
In the above schematic, the PS/SYNC pin is connected to VIN. If this is the case, the device is not allowed to go into power save mode. This means the converter needs to switch with a fixed frequency hence dissipates more power causing higher input current.
Please connect the PS/SYNC pin to GND and check if the converter then works as you expect it.
In addition these app notes might be interesting according to your question:
IQ: What it is, what it isn’t, and how to use it
Performing Accurate PFM Mode Efficiency Measurements
For more information on buck-boost devices have a look at www.ti.com/buckboost
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In reply to Brigitte:
Thanks for your reply. I will check.
In reply to yusufs siddik:
Sorry for the delay. I was ordered TPS63000 Evaluation board. From this eval board i got the Iq is 50uA as per the data sheet without load connection. Same circuit i was used in my own board, i got the Iq is 1mA without connecting load. One thing is tps63000 evaluation board they are used LPS3015-222ML (coil craft) inductor. But this coil craft inductor is not available in digikey and mouser. Can you please suggest alternate 2.2uH inductor available in mouser and digikey. Currently we have using below the inductor. This inductor is correct one? Or can I change any other inductor?
In reply to Milos:
Issue resolved ☺️. Thanks for your support.
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