Hi,
I have a simple circuit to light a LED when pin 2 of a 7555 timer receives a trigger pulse. The LED stays on for about a minute, then shuts off until another trigger pulse is received. This circuit is battery-powered, and the smaller the battery, the better. The supply current for the 7555 is 60 micro-amps. This is good, but not great. Drawing less current in the quiet state would be better. This is a link to the 7555 datasheet: https://www.renesas.com/eu/en/document/dst/icm7555-icm7556-datasheet
I've been looking at the TPL5110, but the datasheet is difficult for me to understand: https://www.ti.com/lit/ds/symlink/tpl5110.pdf
It says this IC is for "power gating" applications, which (I guess) is different from what I'm doing above (lighting a LED for a minute). It seems to draw only ~35 nano-amps, which would be great. I bought a few breakout boards (Adafruit, Sparkfun, and LowPowerLab) for testing, for example TPL5110 Breakout (lowpowerlab.com) I also have some discrete 5110's. But at this point, I don't know if the 5110 can be used as a replacement for a 7555 in my application, or how. Any guidance would be greatly appreciated.
Thanks,
Joe
I have a simple circuit to light a LED when pin 2 of a 7555 timer receives a trigger pulse. The LED stays on for about a minute, then shuts off until another trigger pulse is received. This circuit is battery-powered, and the smaller the battery, the better. The supply current for the 7555 is 60 micro-amps. This is good, but not great. Drawing less current in the quiet state would be better. This is a link to the 7555 datasheet: https://www.renesas.com/eu/en/document/dst/icm7555-icm7556-datasheet
I've been looking at the TPL5110, but the datasheet is difficult for me to understand: https://www.ti.com/lit/ds/symlink/tpl5110.pdf
It says this IC is for "power gating" applications, which (I guess) is different from what I'm doing above (lighting a LED for a minute). It seems to draw only ~35 nano-amps, which would be great. I bought a few breakout boards (Adafruit, Sparkfun, and LowPowerLab) for testing, for example TPL5110 Breakout (lowpowerlab.com) I also have some discrete 5110's. But at this point, I don't know if the 5110 can be used as a replacement for a 7555 in my application, or how. Any guidance would be greatly appreciated.
Thanks,
Joe