LT8642 Series

The LT8642-1 synchronous step-down regulator features Silent Switcher architecture designed to minimize EMI emissions while delivering high efficiency at high switching frequencies. This performance makes the LT8642-1 ideal for noise sensitive applications and environments.The fast, clean, low-overshoot switching edges enable high efficiency operation even at high switching frequencies, leading to a small overall solution size. Peak current mode control with a 20ns minimum on-time allows high step-down ratios even at high switching frequencies. External compensation via the VCpin allows for fast transient response at high switching frequencies. The VCpin also enables current sharing and a CLKOUT pin enables synchronizing other regulators to the LT8642-1.Burst Mode operation enables low standby current consumption, forced continuous mode can control frequency harmonics across the entire output load range, or spread spectrum operation can further reduce EMI emissions. Soft-start and tracking functionality is accessed via the SS pin, and an accurate input voltage UVLO threshold can be set using the EN/UV pin.APPLICATIONSServer Power ApplicationsAutomotive and Industrial SuppliesGeneral Purpose Step-DownINTERNAL CAPACITORSPACKAGELT8642SVIN, BST, INTVCC4mm × 4mm LQFNLT8642-1None3mm × 4mm LQFN