LM5146QRGYRQ1 Description

The LM5146QRGYRQ1 100-V synchronous buck controller regulates either a high input voltage source or a high voltage transient-prone input rail, reducing the need for external surge suppression components. Large step-down ratios are enabled by a high-side switch minimum on-time of 40 ns, allowing direct step-down conversion from a 48-V nominal input to low-voltage rails for decreased system complexity and solution cost. The LM5146QRGYRQ1 operates at approximately 100 percent duty cycle with input voltage dips as low as 5.5 V, making it a great choice for high-performance 48-V battery automotive applications, ADAS (surround view ECU), and HEV/EV systems.

LM5146QRGYRQ1 Features

For a high VIN/VOUT ratio, a 40-ns tON(min) is required.

tOFF(min) 140 ns for low dropout

Shunt current sensing or lossless RDS(on)

- CISPR 25 Class 5 requirements optimized

LM5146QRGYRQ1 Applications

? Automotive DC/DC regulator with high power

? ADAS, automotive motor drives

? Hybrid/electric powertrains

? Cluster and infotainment