LT8646SIV#WPBF

LT8646S 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 eliminating layout sensitivity. 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 40ns minimum on-time allows high step-down ratios even at high switching frequencies. Burst mode operation enables ultralow standby current consumption, pulse-skipping mode allows full switching frequency at lower output loads, or spread spectrum operation can further reduce EMI emissions. Applications includes automotive and industrial supplies, general purpose step-down and GSM power supplies.

• Internal caps, external VC COMP, AEC-Q100 qualified for automotive applications
• Ultralow EMI emissions on any PCB, eliminates PCB layout sensitivity
• Internal bypass capacitors reduce radiated EMI, optional spread spectrum modulation
• High efficiency at high frequency, up to 95% at 1MHz, 12VIN to 5VOUT, 94% at 2MHz, 12VIN to 5VOUT
• Wide input voltage range from 3.4V to 65V
• Ultralow quiescent current burst mode operation, output soft-start and tracking
• Fast minimum switch on-time of 40ns, low dropout under all conditions: 60mV at 1A
• 200KHz to 2.2MHz adjustable and synchronizable frequency, peak current mode operation
• External compensation to enable current sharing, fast transient response at high switching frequency
• LQFN package, -40°C to 125°C temperature range

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