4 References

Texas Instruments, TPS63900 1.8-V to 5.5-V, 400-mA, 75-nA Quiescent Current Buck-Boost Converter Data Sheet
Texas Instruments, Selecting a DC/DC Converter for Maximum Battery Life in Pulsed-Load Applications
Texas Instruments, I_Q: What It Is, What It Isn’t, and How to Use It
Texas Instruments, Adding an LDO for Increased Standby Mode Efficiency
Texas Instruments, Extend Battery Life Using a DC-DC Converter with Programmable Input Current Limit