Buck-boost topology with a 2.2V to 40V input window
The LTC3114IDHC-1#PBF is a single-inductor buck-boost regulator from Analog Devices that steps up or steps down the input voltage to a regulated adjustable output. Its 2.2V minimum input lets it run from a deeply discharged Li-ion cell, while the 40V maximum input covers 24V industrial rails and automotive load-dump transients without an external clamp. Output current is rated 1A continuous, and the synchronous rectifier (internal FETs for both high-side and low-side) eliminates the external Schottky diode, keeping the BOM count low for a 1.2 MHz switcher.
16-DFN exposed pad — thermal design matters
The 16-WFDFN package with exposed pad (supplier device package 16-DFN 5x3 mm) demands a thermal via array under the paddle to pull heat into the PCB ground plane. Without a low-thermal-resistance board layout, the 125°C junction temperature limit is reached at lower ambient or higher output current. Surface-mount assembly with a standard reflow profile works for the DFN; the tube packaging (50 per tube typical) suits hand-assembly or low-volume pick-and-place without reel fees.
Active lifecycle — no end-of-life risk
The adjustable output range spans 2.7V to 40V, set by an external resistor divider. The single-output positive configuration with internal compensation simplifies the loop — a standard ceramic output cap and inductor complete the design.