SNVSB91C July 2019 – June 2020 LMR36506-Q1
PRODUCTION DATA.
Most systems that require more than a single mode of operation from the LMR36506-Q1 are controlled by digital circuitry such as a microprocessor. These systems can generate dynamic signals easily but have difficulty generating multi-level signals. Pulse-Dependent MODE/SYNC pin control is useful with these systems. To initiate Pulse-Dependent MODE/SYNC pin control, a valid sync signal must be applied. Table 1 shows a summary of the pulse dependent mode selection settings.
MODE/SYNC INPUT | MODE |
---|---|
> VMODE_H | FPWM with Spread Spectrum factory setting |
< VMODE_L | Auto Mode with Spread Spectrum factory setting |
Synchronization Clock | SYNC Mode |
Figure 10 shows the transition between AUTO Mode and FPWM Mode while in Pulse-Dependent MODE/SYNC control. The LMR36506-Q1 transitions to a new mode of operation after the time, tMODE. Figure 10 and Figure 11 show the details.
If MODE/SYNC voltage remains constant longer than tMODE, the LMR36506-Q1 enters either Auto mode or FPWM mode with spread spectrum turned on (if factory setting is enabled) and MODE/SYNC continues to operate in Pulse-Dependent scheme.