DESCRIPTION
The LX1684 is a monolithic, voltage mode pulse-width modulator controller. It is designed to implement a flexible, low cost buck (step-down) regulator supply with a minimal of external components.

KEY FEATURES
▪ Fixed 175kHz Switching Frequency
▪ Constant Frequency Voltage
   Mode Control Requires No External Compensation
▪ Hiccup-Mode Over-Current Protection
▪ High Efficiency
▪ Output Voltage Set By Resistor Divider
▪ Under-Voltage Lockout
▪ Soft-Start And Enable
▪ Synchronous Rectification
▪ Small, 14-pin Surface Mount Package

APPLICATIONS
▪ 12V to 3.3V Or Less Buck Regulators
▪ 3.3/5V to 2.5V Or Less Buck Regulators
▪ Hard Disk Drives
▪ Computer Add-on Cards