L6731B 데이터시트 - STMicroelectronics

Summary description
   The controller is an integrated circuit realized in BCD5 (BiCMOS-DMOS, version 5) fabrication that provides complete control logic and protection for high performance step-down DC-DC and niPOL converters.
   It is designed to drive N-Channel MOSFETs in a synchronous rectified buck topology. The output voltage of the converter can be precisely regulated down to 600mV with a maximum tolerance of ±0.8%. If an external reference is used, it will be trasferred divided by 2 to the N.I. input of the error-amplifier, in accordance to the DDR memory specifications.

FEATUREs
◾ Input voltage range from 1.8V to 14V
◾ Supply voltage range from 4.5V to 14V
◾ Adjustable output voltage down to 0.6V with
   ±0.8% accuracy over line voltage and
   temperature (0°C~125°C)
◾ Fixed frequency voltage mode control
◾ TON lower than 100ns
◾ 0% to 100% duty cycle
◾ VDDR input sense
◾ Regulates VTT and VTTREF within 1% of VDDQ
◾ Soft-start and inhibit
◾ High current embedded drivers
◾ Predictive anti-cross conduction control
◾ Programmable high-side and low-side RDS(on)
   sense over-current-protection
◾ Selectable switching frequency 250KHz/
   500KHz
◾ Power good output
◾ Sink/source capability for ddr memory and
   termination supply
◾ Over voltage protection
◾ Thermal shut-down
◾ Package: HTSSOP16

APPLICATIONs
◾ High performance / high density DC-DC
   modules
◾ Low voltage distributed DC-DC
◾ niPOL converters
◾ DDR memory supply
◾ DDR termination supply
◾ Graphic cards