How to use LT1073 to provide 5V and 100mA output - Electronic Circuits Projects Diagrams Free

chesskin · 2nd April 2007, 07:59 AM

when i use the 120uH inductor and 470uF capacitor, the output can't provide 80mA.I follow the table 1 of the LT1073 data sheet

justDIY · 2nd April 2007, 01:18 PM

try a bigger (higher value) inductor, and make sure your inductor has sufficient current handling abilities. if it's going into saturation, that will mess everything up. also make sure you have a lot of capacitance on the input and output.

mneary · 3rd April 2007, 11:45 PM

Did you include the 68 ohm resistor from Vin to Ilim? It's important. See page 12 for the location of that resistor.

I'm assuming that you're using line 5 of the chart, and your input is a pair of Alkalines.

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2nd April 2007, 01:18 PM	(permalink)
justDIY	try a bigger (higher value) inductor, and make sure your inductor has sufficient current handling abilities. if it's going into saturation, that will mess everything up. also make sure you have a lot of capacitance on the input and output. __________________ If you don't have a planet, what good are gold bars? want to contact me directly? gmail gordonthree check out my project website: http://projects.dimension-x.net Favorite numbers: 09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0

3rd April 2007, 11:45 PM	(permalink)
mneary	Did you include the 68 ohm resistor from Vin to Ilim? It's important. See page 12 for the location of that resistor. I'm assuming that you're using line 5 of the chart, and your input is a pair of Alkalines. Last edited by mneary; 3rd April 2007 at 11:48 PM.