J
Jaye Gallagher
- Jan 1, 1970
- 0
Hi there,
I'm certainly a bit at sea when doing analog design, however, I'm trying to figure out a power supply design that can generate a reasonably clean 3.3V from a single AA battery. My search for a suitable part to handle this has lead me to the MAX1706 which combines a step up DC-DC converter, a low drop-out linear regulator, low battery level detection, and exactly the sort of shutdown control pins I need for on/off stuff.
My question is how to design with the beast. Since I don't really need more than [email protected] I'm figuring I'll use it in low power mode (CLK/SEL connected to ground), and since I'm only going to use the LDO regulator output voltage, I'd like to use the device in "Track" mode, where the DC/DC step up output is automatically regulated to 300mV higher (3.6V) than the regulator output for maximum efficiency.
Has anyone done anything like this, and might have an example schematic demonstrating use of the device in Track mode? What should be done with the FB (DC-DC Step Up Feedback) pin in Track mode? I don't really know which bits of the example circuit to ditch, since it's all scary analog
.
I've been over the data sheet (both for the part and the eval kit) and the application notes to no avail.
Any comments at all on the use of the device at all, really.
Thanks,
Jaye.
Remember to fix up my email address if you're replying by email.
I'm certainly a bit at sea when doing analog design, however, I'm trying to figure out a power supply design that can generate a reasonably clean 3.3V from a single AA battery. My search for a suitable part to handle this has lead me to the MAX1706 which combines a step up DC-DC converter, a low drop-out linear regulator, low battery level detection, and exactly the sort of shutdown control pins I need for on/off stuff.
My question is how to design with the beast. Since I don't really need more than [email protected] I'm figuring I'll use it in low power mode (CLK/SEL connected to ground), and since I'm only going to use the LDO regulator output voltage, I'd like to use the device in "Track" mode, where the DC/DC step up output is automatically regulated to 300mV higher (3.6V) than the regulator output for maximum efficiency.
Has anyone done anything like this, and might have an example schematic demonstrating use of the device in Track mode? What should be done with the FB (DC-DC Step Up Feedback) pin in Track mode? I don't really know which bits of the example circuit to ditch, since it's all scary analog
.I've been over the data sheet (both for the part and the eval kit) and the application notes to no avail.
Any comments at all on the use of the device at all, really.
Thanks,
Jaye.
Remember to fix up my email address if you're replying by email
.
