Two-phase synchronous buck DC/DC controller for high current outputs
The LM5143-Q1 from Texas Instruments is a 65V synchronous buck DC/DC controller for high-current single or dual outputs. The device uses an interleaved, stackable, peak current-mode control architecture for easy loop compensation, fast transient response, excellent load and line regulation, and accurate current sharing with parallelled phases for higher output current.
A high-side switch minimum on-time of 65 ns gives large step-down ratios, enabling the direct conversion from 12, 24 or 48V automotive inputs to low-voltage rails for reduced system complexity and solution cost. The LM5143-Q1 continues to operate during input voltage dips as low as 3.5 V, at nearly 100% duty cycle if needed.
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