LTC3864IDE#PBF

LTC®3864 is a robust, high voltage step-down DC/DC controller optimized for automotive and industrial applications. It drives a P-channel power MOSFET switch allowing 100% duty cycle operation. The wide input and output voltage ranges cover a multitude of applications. This device has been verified with the failure mode and effects analysis (FMEA) procedure for operation during failure conditions. Its peak current mode, constant frequency PWM architecture provides for good control of switching frequency and output current limit. The switching frequency can be programmed from 50kHz to 850kHz with an external resistor and can be synchronized to an external clock from 75kHz to 750kHz. This offers programmable soft-start or output tracking. Safety features include overvoltage protection, overcurrent and short-circuit protection including frequency foldback and a power good output signal.

• Drawing only 40µA quiescent current in a user programmable Burst Mode operation
• Offers excellent light load efficiency, strong high voltage MOSFET gate driver
• Wide operating VIN range from 3.5V to 60V, wide VOUT range from 0.8V to VIN
• Very low dropout operation is 100% duty cycle, power good output voltage monitor
• Constant frequency current mode architecture, verified FMEA for adjacent pin open/short
• Selectable high efficiency Burst Mode® operation or pulse-skipping mode at light loads
• Programmable soft-start or voltage tracking, internal soft-start guarantees smooth start-up
• 12-lead (4mm × 3mm) plastic DFN package
• Temperature range from –40°C to 125°C

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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