DESCRIPTION
The LTC®1699-80, LTC1699-81 and LTC1699-82 are precision (±0.35% max), digitally programmed resistor dividers that comply with Intel 5-bit mobile (LTC1699-80), desktop VRM8.4 (LTC1699-81) and VRM9.0 (LTC1699-82) VID specifications. Each IC can switch the output of a DC/DC converter between two set voltages. A digital input pin, SEL, selects one of two divider settings stored into registers via a 2-wire SMBus interface.

FEATURES
■ Fully Compliant with Intel 5-Bit Mobile
   (LTC1699-80) and Desktop VRM8.4 (LTC1699-81)
   and VRM9.0 (LTC1699-82) VID Specifications
■ 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 Simultaneously
■ PGOOD Pin and 50µs PGOOD Timer
■ Available in MSOP-8 and SSOP-16 Package

APPLICATIONS
■ Intel Desktop Pentium® III Power Supply
■ Intel Mobile Pentium® Power Supply with Intel
   SpeedStepTM Technology
■ Desktop AMD AthlonTM Power Supply
■ Software Programmable Remote Power Supply
■ Power Supplies with Voltage Margining