DESCRIPTION
The LT®3980 is an adjustable frequency (100kHz to 2.4MHz) monolithic buck switching regulator that accepts input voltages up to 58V (80V transient). A high efficiency 200mΩ switch is included on the die along with a boost Schottky diode and the necessary oscillator, control, and logic circuitry.

FEATURES
■ Wide Input Range: Operation from 3.6V to 58V
■ Overvoltage Lockout Protects Circuits Through 80V Transients
■ 2A Maximum Output Current
■ Low Ripple (<15mVP-P) Burst Mode® Operation: IQ = 85µA at 12VIN to 3.3VOUT
■ Adjustable Switching Frequency: 100kHz to 2.4MHz
■ Low Shutdown Current: IQ < 1µA
■ Catch Diode Current Sense Protects Circuit Through Short-Circuit and Input Overvoltage
■ Synchronizable Between 250kHz to 2MHz
■ Power Good Flag
■ Saturating Switch Design: 200mΩ On-Resistance
■ Thermal Protection
■ Soft-Start Capability
■ Small 16-Pin Thermally Enhanced MSOP and 3mm × 4mm DFN Packages

APPLICATIONS
■ Automotive Battery Regulation
■ Distributed Supply Regulation
■ Industrial Supplies
■ Wall Transformer Regulation