LTC3411AEDD

The LTC3411AEDD is a constant frequency, synchronous step-down DC/DC converter from LT, designed for medium power applications. It operates with an input voltage range of 2.5V to 5.5V and offers a user-configurable operating frequency up to 4MHz. This high frequency allows for the use of small, low-cost capacitors and inductors, with heights of 1mm or less.

The converter features internal synchronous power switches for high efficiency, reaching up to 96%. Its current mode architecture and external compensation enable optimized transient response across various loads and output capacitors. The output voltage is adjustable from 0.8V to 5V, and it can deliver up to 1.25A of current.

For power saving, the LTC3411AEDD can be configured for Burst Mode operation, reducing quiescent current to 40µA when load current is low. It also supports forced continuous operation or pulse skipping for reduced noise. In shutdown mode, the device draws less than 1µA. The P-channel MOSFET remains on continuously in dropout conditions (100% duty cycle) to maximize battery life.

Available in a compact 10-lead 3mm x 3mm DFN or MSOP package, the LTC3411AEDD is suitable for applications such as notebook computers, digital cameras, cellular phones, handheld instruments, and board-mounted power supplies.