AN865 Datasheet, PDF (6/7 Pages) Silicon Laboratories – APPLYING DUTY-CYCLE CONTROL TO SAVE POWER

AN865
VOUT (no optional
cutoff switch)
OP AMP
OUTPUT
˜1.9V 1.8V
˜0.95V
Figure 6. “On-Time” Waveforms (for the Circuit in Figure 5)
In summary, utilizing a low-power analog duty-cycling clock operating as an “always on” timer consuming around
500 nA can be a useful approach for ultra-low power systems, cutting system power by cycling circuitry on with a
very low duty cycle, providing boost capability without a regulator, and even burst-powering a microcontroller.
For additional information, refer to the following:
TS1001 Op Amp Data Sheet
TSM9117-20 Data Sheet
6
Rev. 1.0