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The LM5005 high voltage switching regulator features all ofthe funcTIons necessary to implement an efficient high voltagebuck regulator using a minimum of external components. Thiseasy to use regulator includes a 75V N-Channel buck switchwith an output current capability of 2.5 Amps. The regulatorcontrol method is based upon current mode control uTIlizingan emulated current ramp. Current mode control provides inherentline feed-forward, cycle-by-cycle current limiTIng andease of loop compensaTIon. The use of an emulated controlramp reduces noise sensitivity of the pulse-width modulationcircuit, allowing reliable control of very small duty cycles necessaryin high input voltage applications. The operating frequencyis programmable from 50kHz to 500kHz. An oscillatorsynchronization pin allows multiple LM5005 regulators to selfsynchronizeor to be synchronized to an external clock. Additionalprotection features include: current limit, thermalshutdown and remote shutdown capability. The device isavailable in a power enhanced TSSOP-20 package featuringan exposed die attach pad to aid thermal dissipation.
