LT8641ARUDCM#PBF

LT8641ARUDCM#PBF is a LT®8641A step-down regulator that features Silent Switcher architecture designed to minimize EMI emissions while delivering high efficiency at frequencies up to 3MHz. Assembled in a side wettable QFN, the monolithic construction with integrated power switches and inclusion of all necessary circuitry yields a solution with a minimal PCB footprint. An ultralow 2.5μA quiescent current - with the output in full regulation-enables applications requiring the highest efficiency at very small load currents. Transient response remains excellent and output voltage ripple is below 10mVP-P at any load, from zero to full current. It allows high VIN to low VOUT conversion at high frequency with a fast minimum top switch-on time of 35ns. Essential features are included and easy to use: an open-drain PG pin signals when the output is in regulation. Typical applications are automotive and industrial supplies, and general-purpose step-down.

• Ultralow EMI emissions, spread spectrum frequency modulation
• Wide input voltage range from 3V to 65V
• 3.5A maximum continuous, 5A peak transient output
• Ultralow quiescent current Burst Mode® operation
• Fast minimum switch on-time: 35ns, true 2MHz operation for 24VIN systems
• Low dropout under all conditions: 130mV at 1A
• Safely tolerates inductor saturation in overload, output soft-start and tracking
• VIN quiescent current in shutdown is 0.75µA typ (VEN/UV = 0V, VIN = 12V, TA = +25°C)
• 18-lead plastic QFN package
• Temperature range from -40°C to +150°C

注释

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