Analog Devices LT8646SIV#PBF Synchronous Buck Regulators – LOT OF 17

• The LT8646S family is a synchronous step-down (buck) regulator with the “Silent Switcher 2” architecture, which aims to reduce EMI and layout sensitivity.

• It’s rated for 3.4 V to 65 V input, and up to 8 A output current (single output).

• Because the “S” in the name indicates that this variant requires external compensation (unlike the LT8645S which has internal compensation).

• Typical switching frequency is around ~1.95 MHz for this part (typical fixed or default).

Applications & Considerations

• Good for automotive, industrial power supplies, or any design with a wide input voltage range and need for a compact, efficient buck converter with low EMI.

• Because it uses external compensation, careful loop compensation design is needed to ensure stability and good transient response.

• Layout is still important, though the Silent Switcher architecture helps relax some constraints.