L6731B Datasheet, PDF (1/24 Pages) STMicroelectronics – Adjustable step-down controller with synchronous rectification Dedicated to DDR Memory

L6731B
Adjustable step-down controller with synchronous rectification
Dedicated to DDR Memory
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
■ T_ON lower than 100ns
■ 0% to 100% duty cycle
■ V_DDR input sense
■ Regulates V_TT and V_TTREF within 1% of V_DDQ
■ Soft-start and inhibit
■ High current embedded drivers
■ Predictive anti-cross conduction control
■ Programmable high-side and low-side R_DS(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
HTSSOP16 (Exposed Pad)
Applications
■ High performance / high density DC-DC
modules
■ Low voltage distributed DC-DC
■ niPOL converters
■ DDR memory supply
■ DDR termination supply
■ Graphic cards
Order Codes
Part number
L6731B
L6731BTR
June 2006
Package
HTSSOP16
HTSSOP16
Rev 3
Packing
Tube
Tape & Reel
1/24
www.st.com
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