DESCRIPTION
The LT®3437 is a 200kHz monolithic buck switching regulator that accepts input voltages up to 80V. A high efficiency 500mA, 0.8Ωswitch is included on the die along with all the necessary oscillator, control and logic circuitry. Current mode topology is used for fast transient response and good loop stability.

FEATURES
■ Wide Input Range: 3.3V to 60V
■ Load Dump (Input Transient) Protection to 80V
■ 500mA Peak Switch Current
■ Burst Mode® Operation: 100µA Quiescent Current**
■ Low Shutdown Current: IQ < 1µA
■ Burst Mode Operation Defeat
■ 200kHz Switching Frequency
■ Saturating Switch Design: 0.8Ω On-Resistance
■ Peak Switch Current Maintained Over Full Duty Cycle Range*
■ 1.25V Feedback Reference Voltage
■ Easily Synchronizable
■ Soft-Start Capability
■ Small 10-Pin Thermally Enhanced DFN Package

APPLICATIONS
■ High Voltage Power Conversion
■ 14V and 42V Automotive Systems
■ Industrial Power Systems
■ Distributed Power Systems
■ Battery-Powered Systems
■ Powered Ethernet