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 < 0.5μA
■ 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