LT8643SEV#TRPBF

LT8643S synchronous step-down regulator features second generation Silent Switcher architecture designed to minimize EMI emissions while delivering high efficiency at high switching frequencies. This includes the integration of bypass capacitors to optimize all the fast current loops inside and make it easy to achieve advertised EMI performance by reducing layout sensitivity. This performance makes the LT8643S ideal for noise-sensitive applications and environments. Peak current mode control with a 30ns minimum on-time allows high step-down ratios even at high switching frequencies. It has external compensation to enable current sharing and fast transient response at high switching frequencies. Application includes automotive and industrial supplies general purpose step-down.

• Ultralow EMI emissions on any PCB, eliminates PCB layout sensitivity
• Internal bypass capacitors reduce radiated EMI, high efficiency at high frequency
• Ultralow quiescent current burst Mode® operation
• Forced continuous mode, output soft-start and tracking
• Maximum input voltage is 3.4V (TA=25°C)
• Typical quiescent current in shutdown is 0.75µA (VEN/UV=0V, TA=25°C)
• Feedback reference voltage range from 0.964 to 0.976V (VIN=6V, TA=25°C)
• Typical on-time is 30ns (ILOAD=1.5A, SYNC=0V, TA=25°C)
• Typical top power NMOS on-resistance is 66mohm (SW=1A, TA=25°C)
• 24 lead LQFN package, temperature range from -40°C to 125°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party