LTC1699-80 - SMBus VID Voltage Programmers

The SMBus interface uses Write Word protocol to setup the registers and to turn the DC/DC converters on or off. Read Word protocol is used to verify register contents and to return the On/Off status of the converters. The LTC1699-80, LTC1699-81 and LTC1699-82 incorporate safeguards against errors due to bus conflicts.

Three open-drain N-channel outputs (CPU_ON, IO_ON and CLK_ON) are provided to turn DC/DC converter supplies on or off via their RUB/SS inputs. A global control pin, VRON is used to turn the converters on or off simultaneously. An internal timer pulls the PGOOD pin low for 50?s if the divider setting changes or the converters are turned on via the SMBus and the VRON pin.

特点
  • Fully Compliant with Intel 5-Bit Mobile (LTC1699-80) and Desktop VRM8.4 (LTC1699-81) and VRM9.0 (LTC1699-82) VID Specificatio
  • Precision ±0.35% Programmable Resistor Divider for Use with 0.8V Referenced DC/DC Converters
  • Two Different Divider Settings Can Be Stored Using a 2-Wire SMBus Serial Interface (Rev 1.1)
  • Built-In Safeguards Minimize Misprogramming Due to Bus Conflicts
  • Three Open-Drain Pins (CPU_ON, IO_ON, CLK_ON) and a Global Control Pin (VRON) to Shutdown or Soft-Start 3 DC/DC Converters Simul
  • PGOOD Pin and 50?s PGOOD Timer
  • Available in MSOP-8 and SSOP-16 Package
典型应用
LTC1699 Typical Application
应用
  • Intel Desktop Pentium? III Power Supply
  • Intel Mobile Pentium? Power Supply with Intel SpeedStep? Technology
  • Desktop AMD Athlon? Power Supply
  • Software Programmable Remote Power Supply
  • Power Supplies with Voltage Margining
封装信息
LTC1699 Package Drawing
LTC1699 Package Drawing
Order Information 订购型号
器件型号封装温度价格 (以 1 ~ 99 片为批量)价格 (以 1000 片为批量) *
LTC1699EGN-80#PBFSSOP-16E$2.80$2.50
LTC1699EGN-80#TRPBFSSOP-16E$2.61
LTC1699EGN-81#PBFSSOP-16E$2.80$2.50
LTC1699EGN-81#TRPBFSSOP-16E$2.61
LTC1699EGN-82#PBFSSOP-16E$2.80$2.50
LTC1699EGN-82#TRPBFSSOP-16E$2.61
LTC1699EMS8-80#PBFMS-8E$2.40$2.15
LTC1699EMS8-80#TRPBFMS-8E$2.21
LTC1699EMS8-81#PBFMS-8E$2.40$2.15
LTC1699EMS8-81#TRPBFMS-8E$2.21
LTC1699EMS8-82#PBFMS-8E$2.40$2.15
LTC1699EMS8-82#TRPBFMS-8E$2.21
数据表
设计要点
可靠性数据
LT Journal
CAD 符号
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