The LM5141-Q1 is a synchronous buck controller, intended for high voltage wide
VIN step-down converter applications. The control method is peak current
mode control. Current mode control provides inherent line feed-forward, cycle-by-cycle current
limiting, and ease-of-loop compensation. The LM5141-Q1 features slew rate control to simplify the
compliance with CISPR and automotive EMI requirements.
The LM5141-Q1 has two selectable switching frequencies: 2.2 MHz and 440 kHz. Gate drivers
with slew rate Control that can be adjusted to reduce
In light or no-load conditions, the LM5141-Q1 operates in skip cycle mode for improved
low power efficiency. The LM5141-Q1 has a high voltage bias regulator with automatic switch-over to
an external bias to reduce the IQ current from VIN.
Additional features include frequency synchronization, cycle-by-cycle current limit, hiccup mode
fault protection for sustained overload, and power good output.