Abstract

LM(Q)64408(-Q1), LM(Q)644A0(-Q1) and LM(Q)644A2(-Q1) Dual Buck DC/DC Converter family provides flexibility, scalability, and optimized solution size for a wide range of applications. With integrated power MOSFETs, the device is stackable up to 6-phases for higher output currents up to 36 A, and uses a current-mode control architecture for easy loop compensation. The device supports input voltage surge up to 36 V and dip as low as 3 V. The switching frequency is adjustable from 100 kHz to 2.2 MHz using the RT pin and also can be synchronized to an external clock to eliminate beat frequencies in noise-sensitive applications. The output regulation target is programmed to a fixed 3.3 V, 5 V or adjustable using external feedback resistors. Available EMI mitigation features include spread spectrum, integrated input bypass capacitors and low package parasitic with enhanced QFN package.