The LM25141-Q1 is a synchronous buck controller, intended for high-voltage,
wide-VIN, step-down regulator 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 LM25141-Q1 features slew rate control to
simplify the compliance with CISPR and automotive EMI requirements.
The LM25141-Q1 has two selectable switching frequencies: 2.2 MHz and 440 kHz. Gate
drivers with slew rate control can be adjusted to reduce EMI.
In light or no-load conditions, the LM25141-Q1 operates in skip cycle mode for improved
low power efficiency. The LM25141-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.
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