SNVSBW1C December 2021 – August 2024 LM63440-Q1 , LM63460-Q1
PRODUCTION DATA
The LM634x0-Q1 is an easy-to-use, synchronous, buck DC/DC converter designed for a wide variety of automotive applications where strict reliability and low EMI are of paramount importance. The devices operates over an input voltage range of 3.95V to 36V, with operation down to 3V after start-up and transients as high as 42V. The LM63460-Q1 delivers up to 6A DC while the LM63440-Q1 delivers 4A DC load current with high conversion efficiency and ultra-low input quiescent current in a very small design size.
The LM634x0-Q1 has a programmable switching frequency between 200kHz to 2.2MHz using the RT pin, including sub-AM band at 400kHz and above the AM band at 2.1MHz. The converter includes specific features for optimal EMI performance in noise-sensitive automotive applications, such as:
Together, these features significantly reduce EMI filtering requirements, thus eliminating shielding and other expensive EMI mitigation measures, while helping to meet the CISPR 25 Class 5 automotive EMI standard for conducted and radiated emissions.
The enhanced HotRod QFN package of the LM634x0-Q1 has a carefully designed wettable-flank pinout arrangement that provides additional clearance spacing between adjacent VIN, SW, or PGND power pins to improve reliability and pin FMEA. The converter also incorporates other features for comprehensive system requirements, including:
The LM634x0-Q1 is qualified to AEC-Q100 grade 1 and has electrical characteristics specified up to a maximum junction temperature of 150°C. The following help provide an excellent point-of-load regulator design for automotive applications requiring enhanced reliability and durability: