I put together a simple battery-powered LED circuit using a 5V booster switching regulator. It's powered by two AA rechargeable batteries. At most only two LEDs plus the uC and passive circuit components will be energized at one time, so it's relatively low power. Maybe 60mA max.
I picked up a cheap 5V switching regulator here:
http://search.digikey.com/us/en/products/NJU7261U50-TE1/NJU7261U50-TE1CT-ND/673933
Under near-zero load (uC on, but no LEDs), the regulator holds the promised 5V. When I activate two LEDs, however, it drops to about 4V. Note, only two LEDs are ever on at the same time. That's well within the current rating of the regulator.
Any ideas how to troubleshoot this? The circuit is attached.
Thanks!
-Dan
I picked up a cheap 5V switching regulator here:
http://search.digikey.com/us/en/products/NJU7261U50-TE1/NJU7261U50-TE1CT-ND/673933
Under near-zero load (uC on, but no LEDs), the regulator holds the promised 5V. When I activate two LEDs, however, it drops to about 4V. Note, only two LEDs are ever on at the same time. That's well within the current rating of the regulator.
Any ideas how to troubleshoot this? The circuit is attached.
Thanks!
-Dan