I was looking for step-up DC-DC converter with i2c programmable output voltage from 6V to 12V. I found that LT3582 is best fit for my design.Since I don't require negative output, Can I connect passives only to get positive output voltage.
I would like to know, whether LT3582 works fine in single output mode (Positive output voltage) without connecting any passives to negative output voltage part of circuit or Do we have any alternate suggestion?
As I do not know your power or input voltage requirements: How can we suggest a part for you? If you use our LTC7106as Vout control the complete line-up of boost regulators is possible (monolithic or controller).www.analog.com/.../ltc7106.html
Thanks for reply. I've mentioned all the required specs in my last post. However, pls find required specs below:
1. Vin - 2.55 - 5.5V
2. VIO(I2C) - Compatible with 1.8V
3. Output Voltage - Variable 3.2 to 12V.
Thanks for reply. I've mentioned all required specs in my last post. However, pls find required specs below:
4. Iout - 78 to 180mA
Markus suggestion above can be your DAC to control the output voltage and pick one of the boost converters in below link:
Hi, The LT3582 cannot be used for your application, as its switch current is too low for your needs.
Also. the specifications you have provided cannot be met with a boost converter since your output could be lower, or higher than the input.
Your application calls for a SEPIC topology, where the output can be higher, or lower than the input level. Most boost ICs can be connected in SEPIC configuration.
My suggestion is to consider the LT3580, or LT8362, both can be configured as SEPICs. The LT3580 might come in a little short for switch current when your input is at 2.55V, and your output is at 12V 180mA. In my calculation you need a part with at least 1.5A switch current to meet your worst case condition.
Of course, either part you choose will need to use the DAC control suggested by Markus, earlier.