XCL101 Datasheet, PDF (12/19 Pages) Torex Semiconductor – Inductor Built-in Step-up “micro DC/DC” Converter

XCL101Series
■NOTE ON USE (Continued)
13. If the CL capacity or load current becomes excessively large, the output voltage start-up time, when the power is turned on, will increase, so
the coil current might be superimposed during the time it takes for the output voltage to become sufficiently higher than the VBAT voltage.
14. If the input voltage is higher than the output voltage, then the circuit automatically enters the through mode. When the input voltage becomes
close to the output voltage, there could be repeated switching between the boost mode and through mode causing the ripple voltage to
fluctuate. (Refer to the graphic below)
VBAT=VCE=3.316V,VOUT=3.412V,IOUT=3mA,L=4.7μH,CL=10μF,Ta=25℃
VOUT
V_BAT
V_LX
VOUT:100mV/div
V_BAT:100mV/div
VLX:2.0V/div
200[μs/div]
15. If a different power supply is connected from an external source to the XCL101A/XCL101C, the IC could be destroyed.
16. For temporary, transitional voltage drop or voltage rising phenomenon, the IC is liable to malfunction should the ratings be exceeded.
17. Torex places an importance on improving our products and their reliability. We request that users incorporate fail-safe designs and post-aging
protection treatment when using Torex products in their systems.
18. With the XCL101A, when the VBAT or VCE power supply is input, if the VOUT pin voltage does not exceed VBAT -0.35V, which can happen due to
the load current being more than the inrush protection current, step-up mode or through mode operations won’t function correctly.
19. With the XCL101C, when the VBAT power supply is input, if the VOUT pin voltage does not exceed VBAT -0.35V, which can happen due to the
load current being more than the inrush protection current, by pass mode operations won’t function correctly.
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