LTC3855IUJ#PBF

LTC®3855 is a dual PolyPhase® current mode synchronous step-down switching regulator controller that drives all N-channel power MOSFET stages. It includes a high speed differential remote sense amplifier. This features a precision 0.6V reference and can produce output voltages up to 12.5V. A wide 4.5V to 38V input supply range encompasses most intermediate bus voltages and battery chemistries. Power loss and supply noise are minimized by operating the two controller output stages out of phase. Burst Mode® operation, continuous or pulse-skipping modes are supported. This can be configured for up to 12-phase operation, has DCR temperature compensation, two power good signals and two current limit set pins. Typical applications are computer systems, telecom systems, industrial and medical instruments, DC power distribution systems.

• Dual, 180° phased controller reduce required input capacitance and power supply induced noise
• High efficiency: up to 95%, RSENSE or DCR current sensing
• Programmable DCR temperature compensation, output overvoltage protection
• ±0.75% 0.6V output voltage accuracy, phase-lockable fixed frequency 250KHz to 770KHz
• True remote sensing differential amplifier, dual N-channel MOSFET synchronous drive
• Clock input and output for up to 12-phase operation
• Adjustable soft-start or VOUT tracking, foldback output current limiting
• Feedback current is –50nA
• 40-lead plastic QFN package
• Temperature rating range from –40°C to 125°C

注意

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