DESCRIPTION
The LT®3579 is a PWM DC/DC converter with built-in fault protection features to aid in protecting against output shorts, input/output overvoltage, and overtemperature conditions. The part consists of a 42V master switch, and a 42V slave switch that can be tied together for a total current limit of 6A.

FEATURES
■ 6A, 42V Combined Power Switch
■ Output Short Circuit Protection
■ Wide Input Range: 2.5V to 16V Operating, 40V Maximum Transient
■ LT3579-1: Dual-Phase Capable
■ Master/Slave (3.4A/2.6A) Switch Design
■ User Confi gurable Undervoltage Lockout
■ Easily Confi gurable as a Boost, SEPIC, Inverting, or Flyback Converter
■ Low VCESAT Switch: 250mV at 5.5A (Typical)
■ Can be Synchronized to External Clock
■ Can Synchronize other Switching Regulators
■ High Gain SHDN Pin Accepts Slowly Varying Input Signals
■ 20-Lead TSSOP and 20-Pin 4mm × 5mm QFN Packages

APPLICATIONS
■ Local Power Supply
■ Vacuum Flourescent Display (VFD) Bias Supplies
■ TFT-LCD Bias Supplies
■ Automotive Engine Control Unit (ECU) Power