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NCP5211ADR2
Low Voltage Synchronous Buck Controller
NCP5211A
Low Voltage Synchronous
Buck Controller
The NCP5211A is a low voltage synchronous buck controller. It
contains all required circuitry for a synchronous buck converter using
external N−Channel MOSFETs. High current internal gate drivers are
capable of driving low RDS(on) NFETs for better efficiency. The
NCP5211A is in a 14 pin package to minimize PCB area.
The NCP5211A provides overcurrent protection, undervoltage
lockout, soft start and built in adaptive nonoverlap. The NCP5211A is
adjustable over a frequency range of 150 kHz to 750 kHz. This gives
the designer more flexibility to make efficiency and component size
compromises. The NCP5211A will operate on a single supply or a
separate boost supply.
Features Switching Regulator Controller N−Channel Synchronous Buck Design 1.0 Amp Gate Drive Capability 200 ns Transient Response Programmable Operating Frequency of 150 kHz−750 kHz 0.8 V 1% Internal Reference Lossless Inductor Sensing Overcurrent Protection Cycle−by−Cycle Short Circuit Protection Programmable Soft Start 40 ns GATE Rise and Fall Times (3.3 nF Load) 70 ns Adaptive FET Nonoverlap Time Differential Remote Sense Capability System Power Management Operation with a Conversion Rail of 5.0 V or 12 V Undervoltage Lockout On/Off Control Through Use of the COMP Pin Max Duty Cycle Clamped to 70% for Forward Converter Control
Applications Set Top Devices Forward Converters Buck Converters Point of Load Regulation
