?The LTC3891HUDC#PBF is a low-IQ, 60V synchronous step-down switching voltage regulator manufactured by Analog Devices. This device features an adjustable frequency, user-selectable pulse-width modulation (PWM) or burst-mode operation, and a wide 4V to 60V input voltage range. It also includes programmable current limit and soft-start capabilities. In addition, the LTC3891HUDC#PBF includes a low shutdown current (<1µA) and a low operating current (typically 36µA) under active conditions. This device offers excellent transient response and excellent thermal performance. The LTC3891HUDC#PBF is suitable for a wide variety of applications such as power supplies for industrial, consumer, LED lighting, battery-powered systems, and automotive applications.