2 A synchronous buck in a 3x3 mm DFN
The LTC3624IDD#PBF is a step-down (buck) switching regulator delivering 2 A of continuous output current from a 2.7 V to 17 V input range. It integrates both high-side and low-side MOSFETs for synchronous rectification, which eliminates the external catch diode and improves efficiency at low output voltages. The output is adjustable from 0.6 V up to the input voltage.
1 MHz switching — inductor sizing and BOM
The fixed 1 MHz switching frequency lets you select a small inductor and low-value ceramic output capacitors, keeping the total solution footprint compact. The 1 MHz rate also keeps switching losses manageable at moderate load currents, so the part can run without forced air cooling in many enclosure designs.
Package and thermal handling
Housed in an 8-lead WFDFN with exposed pad (3x3 mm body), the LTC3624IDD#PBF relies on the pad for heat sinking. A proper via pattern under the pad to a ground plane is expected for full 2 A continuous operation at high ambient temperatures. The part is surface-mount only.
Lifecycle and compliance
The LTC3624IDD#PBF carries an Active product status and is ROHS3 compliant per the manufacturer's listing. No end-of-life notification or last-time-buy window has been announced, so it remains a safe selection for new production builds.