95-V synchronous DC/DC buck controller

The LV5144

95-V, synchronous,

buck controller regulates from a high input voltage source or from an input rail

subject to high-voltage transients, minimizing the need for external surge

suppression components. A high-side switch minimum on-time of 45 ns gives large

step-down ratios, enabling the direct step-down conversion from a 48-V nominal input

to low-voltage rails for reduced system complexity and design cost. The LV5144 continues to operate during input voltage dips

as low as 6 V, at nearly 100% duty cycle if needed, making an excellent choice for

high-performance industrial controls,

robotics, datacom, and RF applications.

Forced-PWM (FPWM) operation eliminates switching frequency variation to minimize EMI, while user-selectable diode emulation lowers current consumption at light-load conditions. The adjustable switching frequency as high as 1 MHz can be synchronized to an external clock source to eliminate beat frequencies in noise-sensitive applications.