DC Booster IC - Help Needed
I'm trying to make use of the LT1303 IC to boost 5v to 9v but I've come into a couple of problems, the first is that unless I add a small resistor to Vin the chip gets very hot and the ouput voltage drops. The second is that the output voltage drops depending on the load.
The goal is to power 2 2.3" 7-segment displays from 4 aa batteries, but as more segments come on the volage from the IC drops and the displays dim (or potentially go off).
Does anybody know of something i've missed, I've not done a lot of electronics stuff some I'm not entitrely certain.
I'm following the circuit at the top of Pg 9 from the datasheet ( http://cds.linear.com/docs/Datasheet/lt1303.pdf) with R2 at 120k and R1 at 18k which should give me around 9.5v but with a 10 ohm resitor on Vin I get 8.5v and as more segments on the display are lit the voltage drops further.
I'm trying to make use of the LT1303 IC to boost 5v to 9v but I've come into a couple of problems, the first is that unless I add a small resistor to Vin the chip gets very hot and the ouput voltage drops. The second is that the output voltage drops depending on the load.
The goal is to power 2 2.3" 7-segment displays from 4 aa batteries, but as more segments come on the volage from the IC drops and the displays dim (or potentially go off).
Does anybody know of something i've missed, I've not done a lot of electronics stuff some I'm not entitrely certain.
I'm following the circuit at the top of Pg 9 from the datasheet ( http://cds.linear.com/docs/Datasheet/lt1303.pdf) with R2 at 120k and R1 at 18k which should give me around 9.5v but with a 10 ohm resitor on Vin I get 8.5v and as more segments on the display are lit the voltage drops further.
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