The LM5143A-Q1 is a
65-V
DC/DC synchronous buck controller for high-current single or dual
outputs. Deriving from a family of wide-VIN range
controllers, 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 paralleled phases for higher output current. A high-side switch
minimum on time of 65 ns provides large step-down ratios, enabling
the direct conversion from 12-V, 24-V, or 48-V
inputs to low-voltage rails for reduced system complexity and cost.
The LM5143A-Q1 continues to operate
during input voltage dips as low as 3.5 V, at nearly 100% duty cycle
if needed.The 15-µA no-load
quiescent current with the output voltage in regulation extends
operating run-time in battery-powered automotive systems. Power the LM5143A-Q1 from the output of the switching regulator
or another available source for even lower input quiescent current
and power loss.
