JAJSIO5B July 2019 – February 2020 LMR36506-Q1
ADVANCE INFORMATION for pre-production products; subject to change without notice.
At light output current loads, Pulse Frequency Modulation (PFM) mode is activated for the highest possible efficiency. When the inductor current does not reach IPEAK-MIN during a switching cycle, the on-time is increased and the switching frequency reduces as needed to maintain proper regulation. The on-time has a maximum value of approximately 8 µs to avoid large output voltage ripple in dropout conditions. Efficiency is greatly improved by reducing switching and gate drive losses. During this mode of operation, the LMR36506-Q1 can convert with a minimum quiescent current of 6.5 µA (typical) when unloaded.