The LTC1622CS8#PBF is a step-down (buck) switching regulator controller from Analog Devices, designed to drive an external N-channel MOSFET. It operates from a supply voltage (Vcc/Vdd) range of 2V to 10V and delivers a single positive output with a transistor driver output type. Key control features include enable and soft start, and the device supports clock synchronization for noise-sensitive multi-rail systems. The maximum duty cycle is 100%, allowing dropout-free operation near the input rail. The part is housed in an 8-SOIC package (0.154", 3.90mm width) with surface-mount mounting. The commercial temperature grade of 0°C to 70°C suits indoor power supplies, telecom line cards, and office equipment where ambient conditions are controlled.
Sourcing and Lifecycle Status
It is ROHS3 compliant, so no exemption issues for global BOMs. No stock-holding claim is made here; we source per RFQ from authorized and vetted supply chains.
Key Parametric Decisions for the BOM
The 2V to 10V supply range means this controller can be biased from a 3.3V or 5V rail without an extra regulator. The 100% duty cycle capability is useful when the output must track the input closely, such as in battery-powered systems near end-of-discharge. Clock synchronization (Clock Sync: Yes) allows the switching frequency to be locked to an external clock, reducing beat-frequency noise in multi-phase or multi-rail designs. The absence of synchronous rectification (Synchronous Rectifier: No) means an external Schottky diode is needed for the low-side path, adding a component but keeping the controller simple and cost-effective.