LTC1705 - Dual 550kHz Synchronous Switching Regulator Controller with 5-Bit VID and 150mA LDO

Features
  • Three Regulated Outputs: Core, I/O and CLK in One Package
  • Integrated Intel Mobile 5-Bit VID DAC
  • No External Current Sense Resistors
  • All N-Channel External MOSFET Architecture
  • 550kHz Switching Frequency Minimizes External Component Size and Cost
  • Integrated 150mA LDO Linear Regulator
  • Excellent DC Accuracy: 1.25% for Core, 2% for I/O and CLK Supplies
  • PGOOD Flag Monitors All Three Outputs
  • High Efficiency Over Wide Load Current Range
  • Low Shutdown Current: < 100µA
  • Switchers Run Out-of-Phase to Minimize CIN
  • Small 28-Pin Narrow SSOP Package
Typical Application
Applications
  • Complete Power Supply Controller for Intel Mobile Pentium® Processors
  • Intel Mobile Pentium Core, I/O, Clock Supplies
  • Multiple Logic Supply Generator
Packaging
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC1705EGN#PBFSSOP-28E$6.00$5.35
LTC1705EGN#TRPBFSSOP-28E$5.36
Demo Boards
Part NumberDescriptionPrice
DC295BLTC1705EGN | Intel Geyserville VRM, Vin = 4.5 - 5.5V, 0.925V - 2V @ 14Amp with 1.5V @ 2.5A and 2.5V @ 150mA Output (Requires DC296A for testing)Contact Factory
Companion Boards
Part NumberDescriptionPrice
DC296ALT1361CS8, LT1210CR | Mobile-CPU VRM Tester, 1 Input, 3 Output with 15A Load PulserContact Factory
Datasheet
Reliability Data
LT Journal
Related Product
LTC1705 - Dual 550kHz Synchronous Switching Regulator Controller with 5-Bit VID and 150mA LDO
R384 Reliability Data
Dec 2001 LTC1705: 2-Step Voltage Conversion Reduces Size and Heat in Notebook Computer Supply
LTC1705 Footprints and Symbols