Linear Technology announces LTC3854, Wide Input Voltage Range Synchronous Step-Down Switching DC/DC Controller

Mon, May 25th, 2009. In Microcontroller, Microprocessor, Semiconductor

The LTC3854 is a high performance synchronous stepdown switching regulator controller that drives an all N-channel synchronous power MOSFET stage. The LTC3854 features a 400kHz constant frequency current mode architecture. The LTC3854 operates from a 4.5V to
38V (40V absolute maximum) input voltage range and regulates the output voltage from 0.8V to 5.5V. The RUN/SS pin provides both soft-start and enable features. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. Current foldback limits MOSFET dissipation during short circuit conditions. Current foldback functions are disabled during soft-start. The LTC3854 has a minimum on-time at 75ns, making it well suited for high step-down ratios. The strong onboard MOSFET drivers allow the use of high power external MOSFETs to produce output currents up to 20A…

LTC3854---Typical-Application

LTC3854---DDB-Package

LTC3854---MSE-Package

LTC3854
(Pictures: Linear)

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