DESCRIPTION
The LT®3680 is an adjustable frequency (200kHz to 2.4MHz) monolithic buck switching regulator that accepts input voltages up to 36V. A high efficiency 95m switch is included on the die along with a boost Schottky diode and the necessary oscillator, control, and logic circuitry. Current mode topology is used for fast transient response and good loop stability. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping output ripple below 15mV in a typical application.

FEATURES
■ Wide Input Voltage Range: 3.6V to 36V
■ 3.5A Maximum Output Current
■ Low Ripple (<15mVP-P) Burst Mode® Operation:
   IQ = 75μA at 12VIN to 3.3VOUT
■ Adjustable Switching Frequency: 200kHz to 2.4MHz
■ Low Shutdown Current: IQ < 1μA
■ Integrated Boost Diode
■ Synchronizable Between 250kHz to 2MHz
■ Power Good Flag
■ Saturating Switch Design: 95m On-Resistance
■ 0.790V Feedback Reference Voltage
■ Output Voltage: 0.79V to 30V
■ Thermal Protection
■ Soft-Start Capability
■ Small 10-Pin Thermally Enhanced MSOP and
   (3mm × 3mm) DFN Packages

APPLICATIONS
■ Automotive Battery Regulation
■ Power for Portable Products
■ Distributed Supply Regulation
■ Industrial Supplies
■ Wall Transformer Regulation