DESCRIPTION
The LT ®3431 is a 500kHz monolithic buck switching regulator that accepts input voltages up to 60V. A high efficiency 3A, 0.1Ωswitch is included on the die along with all the necessary oscillator, control and logic circuitry. A current mode architecture provides fast transient response and good loop stability.

FEATURES
■ Wide Input Range: 5.5V to 60V
■ 3A Peak Switch Current
■ Small Thermally Enhanced 16-Pin TSSOP Package
■ Constant 500kHz Switching Frequency
■ Saturating Switch Design: 0.1Ω
■ Peak Switch Current Maintained Over Full Duty Cycle Range
■ Effective Supply Current: 2.5mA
■ Shutdown Current: 30µA
■ 1.2V Feedback Reference Voltage
■ Easily Synchronizable
■ Cycle-by-Cycle Current Limiting

APPLICATIONS
■ Industrial and Automotive Power Supplies
■ Portable Computers
■ Battery Chargers
■ Distributed Power Systems