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LM2587: typical boost regulator application

Part Number: LM2587

Hi, 

Recently I bought several LM2587-ADJ/NOPB, and now I meet some problems with application provided by datasheet.

Input 6V, 1A, DC source. The output side we connect 100ohms power resistor.

Actually, the circuit behaves well with no load, the output voltage is exactly like what we set 12V. However, as 100ohms resistor connect to the output side, the output voltage drop significantly, like 6-8V, and sometimes the chip gets hot and burns out.

Ask for help! How to set the output voltage when we get a load.