DESCRIPTION
The LTC®3714 is a synchronous step-down switching regulator controller for CPU power. An output voltage between 0.6V and 1.75V is selected by a 5-bit code (Intel mobile VID specification). The controller uses a constant on-time, valley current control architecture to deliver very low duty cycles without requiring a sense resistor. Operating frequency is selected by an external resistor and is compensated for variations in VIN and VOUT.

FEATURES
■ True Current Mode with Ultrafast Transient Response
■ Stable with Ceramic COUT
■ tON(MIN) < 100ns for Operation from High Input
   Ranges
■ Supports Active Voltage Positioning
■ No Sense Resistor Required
■ 5-Bit VID Programmable Output Voltage: 0.6V to 1.75V
■ Dual N-Channel MOSFET Synchronous Drive
■ Programmable Output Offsets
■ Power Good Output Voltage Monitor
■ Wide VIN Range: 4V to 36V
■ ±1% 0.6V Reference
■ Adjustable Frequency
■ Programmable Soft-Start
■ Output Overvoltage Protection
■ Optional Short-Circuit Shutdown Timer
■ Forced Continuous Control Pin
■ Logic Controlled Micropower Shutdown: IQ ≤ 30µA
■ Available in 0.209" Wide 28-Lead SSOP Package

APPLICATIONS
■ Power Supply for Mobile Pentium® Processors and
   Transmeta Processors
■ Notebook and Portable Computers