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Problem with driving a circuit using boost converter(LT3580) from Li-ion Battery

Question asked by nitish111 on May 25, 2017
Latest reply on May 31, 2017 by Fil

Hi All,

 

I have a device that runs on 9V battery. It consumes about 100 mA @ 8.5 V. I am trying to replace 9V battery with rechargeable Li - ion battery (1 cell nominal 3.7 V). I have connected Li-ion battery to input of LT3580 (schematic attached). The circuit works fine when the load is not connected. The output of LT3580 is around 9.56 V. When I connect the load output voltage of LT3580 drops to battery voltage. According to data sheet this configuration should give me around 500 mA but I am not getting expected output.  :scared: :scared:

 

http://cds.linear.com/docs/en/datasheet/3580fg.pdf

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