NCV8851 Automotive Grade Synchronous Buck Controller
The NCV8851 is an adjustable output, synchronous buck controller,
which drives dual N?channel MOSFETs, ideal for high power
applications. Average current mode control is employed for very fast
transient response and tight regulation over wide input voltage and
output load ranges. The IC incorporates an internal fixed 6.0 V
low?dropout linear regulator (LDO), which supplies charge to the
switch mode power supply’s (SMPS) bottom gate driver, limiting the
power lost to excess gate drive. The IC is designed for operation over a
wide input voltage range (4.5 V to 40 V) and is capable of 10 to 1
voltage conversion at 500 kHz.
Additional controller features include undervoltage lockout,
internal soft start, low quiescent current sleep mode, programmable
frequency, SYNC function, average current limiting, cycle?by?cycle
overcurrent protection and thermal shutdown.