LX1668CDW

The LX1668 is a Monolithic Switching Regulator Controller IC designed to provide a low cost, high performance adjustable power supply for advanced microprocessors and other applications requiring a very fast transient response and a high degree of accuracy. It provides a programmable switching regulator output, together with one internal linear low dropout regulator and one adjustable linear regulator driver.
The LX1668 offers a triple-output single-chip power supply for Pentium® II and other processors.KEY
FEATURES
• 5-Bit Programmable Output For CPU Core Supply
• Internal Fixed 2.5V Low Dropout Regulator
• Adjustable Linear Regulator Driver
• Complete Single-Chip Power Solution For Pentium II Processors
• No Sense Resistor Required For Short-Circuit Current Limiting
• Soft-Start And Hiccup-Mode Current Limiting Functions
• Modulated Constant Off-Time Control Mechanism For Fast Transient Response And Simple System Design
• Power Good Flag
• Over-Voltage Pin & SCR
• Digital-Compatible Inputs (Including VID Pins)
• Output Disable Function Shuts Off PWM While Keeping 2.5V LDO Active - Compatible With "Green PC" And "Instant On" Requirements
• Compatible to VRM8.2 - 8.4 SpecificationsAPPLICATIONS
• Pentium II & Pentium III Processor Supplies
• Voltage Regulator Modules
• General Purpose And Microprocessor DC:DC Supplies