We at Flex in Linköping mostly do wearable and IoT products, and it is also here we have the most issues finding low leakage parts. As the system typically is in deep sleep most of the time we need power supply parts that have a very low leakage, but when it is active it may consume 40-200mA (or more) on BLE/GNSS/LoRa/Sigbee/WiFi/etc.
We have both supply in the form of LiPo rechargeable and Li primary cells.
Normally the MCU is the only chip with constant supply, it typically uses about 2uA while in sleep.
We would like to see what TI would recommend for topology for such a product. Could for instance a LDO in parallel to a step down be an effective solution?
