The LM5164DDAR synchronous buck converter isdesigned to regulate over a wide input voltage range, minimizing the need for external surgesuppression components. A minimum controllable on-time of 50 ns facilitates large step-downconversion ratios, enabling the direct step-down from a 48-V nominal input to low-voltage rails forreduced system complexity and solution cost. The LM5164DDAR operates during input voltage dips as low as 6 V, at nearly 100%duty cycle if needed, making it an excellent choice for wide inputsupply range industrial and high cell count battery pack applications.

With integrated high-side and low-side power MOSFETs, the LM5164DDAR delivers up to1-A of outputcurrent. A constant on-time (COT) control architecture provides nearly constant switching frequencywith excellent load and line transient response. Additional features of the LM5164DDAR include ultra-lowIQ and diode emulation mode operation for high light-load efficiency,innovative peak and valley overcurrent protection, integrated VCC bias supply and bootstrap diode,precision enable and input UVLO, and thermal shutdown protection with automatic recovery. Anopen-drain PGOOD indicator provides sequencing, fault reporting, and output voltagemonitoring.

The LM5164DDAR is available in a thermally-enhanced, 8-pin SOPowerPAD package. Its 1.27-mm pin pitch providesadequate spacing for high-voltage applications.

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