LTC3858IUH#PBF

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The LTC3858IUH#PBF is a high input voltage, high frequency synchronous buck controller that provides a cost-effective current-mode control solution optimized for applications requiring up to 3A of output current. It integrates high-side and low-side FETs and a switching controller, ensuring reliable dynamic behavior with minimal external components. Its design integrates true differential remote sensing, PWM input control with output voltage trim capability, accurate current limit and thermal shutdown functions, and direct high-side gate-drive capability for output voltages greater than the battery voltage. Additionally, its unique current-mode approach allows for the use of smaller inductors and capacitors, providing higher efficiency and better transient response.The LTC3858IUH#PBF is used in a wide variety of applications including industrial and automotive power supplies, LED lighting controllers, power supplies for portable equipment, distributed power systems, and telecom/datacom systems. In automotive systems, it can be used to power dashboard displays, alternate fuel injectors, electric vehicle chargers, and other electronic peripherals. In industrial applications, it can be used to power a variety of applications including point-of-load regulators, uninterruptible power supplies, fuel cell power supplies, and 12V to 5V converters.The LTC3858IUH#PBF\'s unique current-mode approach allows for the efficient transfer of power from the input voltage to the output voltage without the need for an additional filter capacitor. It features simple connection with a two-wire input connector and two-wire output connector for compatibility with many standard load types. The LTC3858IUH#PBF\'s wide input voltage range of 4.5V to 60V and its high switching frequency of up to 800kHz allows for the design of small, efficient, and high-performance power supplies.The LTC3858IUH#PBF\'s operating principle is based on a current-mode buck controller with an integrated high-side and low-side FET driver. A voltage signal is applied to the PWM input which controls the duty cycle of the synchronous MOSFETs. An external resistor sets the frequency of the PWM signal and the sensing resistor sets the peak inductor current limit. The input voltage and output voltage are monitored by the controller and if any of these parameters exceed the predefined thresholds, the controller will shut down.The LTC3858IUH#PBF\'s integrated differential remote sense amplifier along with its PWM input control with output voltage trim capability provide high precision and excellent dynamic response. The LTC3858IUH#PBF can operate in either continuous-conduction mode (CCM) or discontinuous-conduction mode (DCM) and it supports multiple operating modes such as Burst Mode™ and skip-cycle mode. Its versatile design and excellent performance make it ideal for a wide variety of applications.In conclusion, the LTC3858IUH#PBF is a high input voltage, high frequency synchronous buck controller that provides a cost-effective current mode control solution optimized for applications requiring up to 3A of output current. Its wide input voltage range and its high switching frequency make it suitable for a variety of applications. Its exclusive features such as true remote sensing, PWM input with output voltage trim, current limit and thermal shutdown functions, and gate drive capability for output voltages higher than the battery voltage make it an excellent choice for industrial and automotive power supplies, LED lighting controllers, power supplies for portable equipment, distributed power systems, and telecom/datacom systems.

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