We see lot of battery operated devices in the market and some devices operating on coin cell battery operates for years. It is interesting to understand some of the options which can help extend the battery life. Let us list some of the options.
- Dynamic voltage Frequency Scaling (DVFS) in devices like microcontroller to reduce power consumption by controlling the voltage and frequency.
- Keeping the device in ultra low power mode. Waking a device at regulator intervals and going back to sleep is must
- Use power switch in the HW design to control circuit power
- under active mode of devices of microcontrollers, disable various peripherals which are not in use
- In most circuits PU/PD resistors on lines are the leakage points. Ensure that resistors are scaled to reduce as much power consumption as possible during static and dynamic conditions
- Selecting devices in the circuit which have low quiescent current
- No LDO definitely, instead use DC-DC converter with best efficiency
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